UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K Current Report Pursuant To Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): ~~July~~September 2627, 2004 ~~INDYMAC~~(Date ~~MBS,~~of ~~INC.~~earliest asevent ~~Depositor,~~reported) ~~IndyMac~~Indymac ~~Bank,~~MBS ~~F.S.B.~~Inc (as ~~Seller~~Depositor ~~and as Master Servicer, and Deutsche Bank National Trust Company, as trustee~~ under the Pooling and Servicing Agreement, dated as of June 1, 2004, providing for the issuance of ~~IndyMac~~IndyMAc ~~MBS,~~INDX ~~Inc.~~Mortgage ~~Residential~~Loan ~~Asset-Securitization~~ Trust ~~Series~~ 2004-A4AR4 Mortgage Pass-Through Certificates, Series 2004-D.AR4) ~~RESIDENTIAL ASSET SECURITIZATION TRUST 2004-A3~~ (Exact name of ~~Registrant~~registrant as specified in ~~its Charter~~charter) DELAWARE (State or Other Jurisdiction of Incorporation) 333-116470-0305 95-4791925 (Commission File Number) (I.R.S. Employer Identification No.) 155 NORTH LAKE AVENUE PASADENA, CALIFORNIA 91101 (Address of principal executive offices) (Zip Code) Registrant's Telephone Number, Including Area Code: (800) 669-2300 (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): [ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) [ ] Soliciting material pursuant to Rule 14a-12(b) under the Exchange Act (17 CFR 240.14a-12(b)) [ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) [ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Item 58.01 Other Events Attached hereto is a copy of the Monthly Remittance Statements to the Certificateholders which was derived from the monthly information submitted by the Master Servicer of the Trust to the Trustee. Item 79.01 Financial ~~Statement~~Statements and Exhibits (c) Exhibits: ~~(as~~Exhibit ~~noted~~No. inDescription ~~Item~~99.1 ~~5 above)~~ Monthly Remittance Statement to the Certificateholders dated as of ~~July~~September 2627, 2004. ~~SIGNATURE~~Signatures Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized. Deutsche Bank National Trust Company, ~~not~~ in itits ~~individual~~ capacity, ~~but solely~~ as aTrustee ~~duly~~under ~~authorized agent of~~ the ~~Registrant pursuant to the~~ Pooling and Servicing Agreement, ~~dated~~on asbehalf of ~~June~~Indymac 1MBS Inc,~~2004.~~ Registrant Date: ~~Aug~~Sep 1227, 2004 By: /s/ Katherine M. Wannenmacher Katherine M. Wannenmacher Vice President EXHIBIT INDEX DOCUMENT 99.1 Monthly Remittance Statement to the Certificateholders dated as of ~~July~~September 2627, 2004.

	IndyMac Residential Asset Securitization Trust 2004-A4
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	July 26, 2004 Distribution
	September 27, 2004 Distribution
	Contents
			TABLE OF CONTENTS
								Page
			1.	Contents				1
			2.	Certificate Payment Report				2
			3.	Collection Account Report				84
			4.	Credit Enhancement Report				117
			5.	Collateral Report				128
			6.	Delinquency Report				1511
			7.	REO Report				1615
			8.	Prepayment Report				1716
			9.	Prepayment Detail Report				2019
			10.	Realized Loss Report				2120
			11.	Realized Loss Detail Report				2423
			12.	Triggers, Adj. Rate Cert. and Miscellaneous Report				2524
			13.	Other Related Information				2625
			14.	Additional Certificate Report				2726
				Total Number of Pages				2726
			CONTACTS
				Administrator: Brent Hoyler
				Direct Phone Number: (714)247-6322
				Address: Deutsche Bank
				1761 E. St. Andrew Place, Santa Ana, CA 92705
				Web Site: https://www.corporatetrust.db.com/invr
				Factor Information: (800) 735-7777
				Main Phone Number: (714) 247-6000
ISSUANCE INFORMATION
	Seller:		IndyMac Bank					Cut-Off Date: June 1, 2004
	Certificate Insurer(s):							Closing Date: June 29, 2004
								First Payment Date: July 26, 2004
	Servicer(s):		IndyMac Bank Master Servicer
								Distribution Date: July 26, 2004
								Distribution Date: September 27, 2004
	Underwriter(s):		~~Bear,~~Lehman ~~Stearns~~Brothers ~~& Co. Inc~~ Underwriter					Record Date: ~~June~~August 3031, 2004
			Goldman, Sachs & Co. Underwriter
						Page 1 of 26					© COPYRIGHT 2004 Deutsche Bank
						Page 1 of 27					© COPYRIGHT 2004 Deutsche Bank
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	IndyMac Residential Asset Securitization Trust 2004-A4
	Collateralized Asset-Backed Bonds
	Subsidiary REMIC Series 2004-A4
	REMIC I Series 2004-AR4
	Certificate Payment Report for July 26, 2004 Distribution
	Certificate Payment Report for September 27, 2004 Distribution
	Distribution in Dollars - Current Period
					Prior						Current
	Class	Original			Principal			Total	Realized	Deferred	Principal
Class	Type	Face Value			Balance	Interest	Principal	Distribution	Losses	Interest	Balance
					(1)	(2)	(3)	(4)=(2)+(3)	(5)	(6)	(7)=(1)-(3)-(5)+(6)
SUB-REMIC		254,900,638.00			254,900,638.00	1,224,888.63	1,580,626.03	2,805,514.66	-	-	253,320,011.97
1-A		332,882,000.00			325,633,654.87	1,305,649.18	5,903,426.68	7,209,075.86	-	-	319,730,228.19
Total		254,900,638.00			254,900,638.00	1,224,888.63	1,580,626.03	2,805,514.66	-	-	253,320,011.97
2-A		183,084,000.00			180,794,758.33	786,269.86	1,384,221.97	2,170,491.83	-	-	179,410,536.36
3-A		213,509,000.00			209,839,815.76	863,764.84	1,968,696.54	2,832,461.38	-	-	207,871,119.22
A-R		100.00			-	0.00	-	0.00	-	-	-
B-1		30,591,000.00			30,561,893.66	126,095.96	20,391.80	146,487.76	-	-	30,541,501.86
B-2		8,628,000.00			8,619,790.74	35,564.58	5,751.38	41,315.96	-	-	8,614,039.36
B-3		4,706,000.00			4,701,522.39	19,398.11	3,137.00	22,535.11	-	-	4,698,385.40
B-4		5,098,000.00			5,093,149.42	21,013.93	3,398.30	24,412.23	-	-	5,089,751.12
B-5		3,530,000.00			3,526,641.32	14,550.64	2,353.08	16,903.72	-	-	3,524,288.24
B-6		2,353,358.00			2,351,118.87	9,700.53	1,568.74	11,269.27	-	-	2,349,550.13
P		100.00			100.00	6,949.37	-	6,949.37	-	-	100.00
Total		784,381,558.00			771,122,445.37	3,188,957.01	9,292,945.49	12,481,902.49	-	-	761,829,499.88
	Interest Accrual Detail				Current Period Factor Information per $1,000 of Original Face
						Orig. Principal	Prior				Current
	Period	Period				(with Notional)	Principal			Total	Principal
Class	Starting	Ending		Method	Cusip	Balance	Balance	Interest	Principal	Distribution	Balance
							(1)	(2)	(3)	(4)=(2)+(3)	(5)
SUB-REMIC	06/25/04	07/24/04		A-30/360		254,900,638.00	1,000.000000	4.805357	6.200950	11.006307	993.799050
1-A	07/31/04	08/31/04		A-30/360	45660NQ24	332,882,000.00	978.225482	3.922258	17.734292	21.656551	960.491190
							Page 2 of 27				© COPYRIGHT 2004 Deutsche Bank
2-A	07/31/04	08/31/04		A-30/360	45660NQ32	183,084,000.00	987.496222	4.294585	7.560584	11.855169	979.935638
	IndyMac Residential Asset Securitization Trust 2004-A4
3-A	07/31/04	08/31/04		A-30/360	45660NQ40	213,509,000.00	982.814850	4.045566	9.220672	13.266239	973.594177
A-R				A-30/360	45660NQ57	100.00	-	0.002000	-	0.002000	-
B-1	07/31/04	08/31/04		A-30/360	45660NQ65	30,591,000.00	999.048533	4.121995	0.666595	4.788590	998.381938
B-2	07/31/04	08/31/04		A-30/360	45660NQ73	8,628,000.00	999.048533	4.121996	0.666595	4.788591	998.381938
B-3	07/31/04	08/31/04		A-30/360	45660NQ81	4,706,000.00	999.048533	4.121995	0.666595	4.788590	998.381938
B-4	07/31/04	08/31/04		A-30/360	45660NQ99	5,098,000.00	999.048533	4.121995	0.666595	4.788590	998.381938
B-5	07/31/04	08/31/04		A-30/360	45660NR23	3,530,000.00	999.048533	4.121994	0.666595	4.788589	998.381938
B-6	07/31/04	08/31/04		A-30/360	45660NR31	2,353,358.00	999.048537	4.121995	0.666595	4.788590	998.381942
P	07/31/04	08/31/04		F-30/360	IN04A401P	100.00	1,000.000000	69,493.700000	-	69,493.700000	1,000.000000
							Page 2 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Subsidiary REMIC Series 2004-A4
	REMIC I Series 2004-AR4
	Certificate Payment Report for July 26, 2004 Distribution
	Certificate Payment Report for September 27, 2004 Distribution
	Distribution in Dollars - to Date
											Current
	Original				Unscheduled	Scheduled	Total	Total	Realized	Deferred	Principal
Class	Face Value		Interest		Principal	Principal	Principal	Distribution	Losses	Interest	Balance
	(1)		(2)		(3)	(4)	(5)=(3)+(4)	(6)=(2)+(5)	(7)	(8)	(9)=(1)-(5)-(7)+(8)
SUB-REMIC	254,900,638.00		1,224,888.63		2,660,283.55	-	1,580,626.03	2,805,514.66	-	-	253,320,011.97
1-A	332,882,000.00		3,968,800.44		12,820,768.79	331,003.02	13,151,771.81	17,120,572.25	-	-	319,730,228.19
Total	254,900,638.00		1,224,888.63		2,660,283.55	-	1,580,626.03	2,805,514.66	-	-	253,320,011.97
2-A	183,084,000.00		2,374,669.01		3,456,400.99	217,062.65	3,673,463.64	6,048,132.65	-	-	179,410,536.36
3-A	213,509,000.00		2,619,468.75		5,454,433.03	183,447.75	5,637,880.78	8,257,349.53	-	-	207,871,119.22
A-R	100.00		0.00		-	100.00	100.00	100.00	-	-	-
B-1	30,591,000.00		378,875.55		18,574.26	30,923.88	49,498.14	428,373.69	-	-	30,541,501.86
B-2	8,628,000.00		106,859.48		5,238.75	8,721.89	13,960.64	120,820.12	-	-	8,614,039.36
B-3	4,706,000.00		58,284.74		2,857.39	4,757.21	7,614.60	65,899.34	-	-	4,698,385.40
B-4	5,098,000.00		63,139.73		3,095.41	5,153.47	8,248.88	71,388.61	-	-	5,089,751.12
B-5	3,530,000.00		43,719.74		2,143.35	3,568.41	5,711.76	49,431.50	-	-	3,524,288.24
B-6	2,353,358.00		29,146.80		1,428.90	2,378.97	3,807.87	32,954.67	-	-	2,349,550.13
P	100.00		11,824.90		-	-	-	11,824.90	-	-	100.00
Total	784,381,558.00		9,654,789.15		21,764,940.87	787,117.24	22,552,058.12	32,206,847.26	-	-	761,829,499.88
	Interest Detail
	Pass-	Prior Principal				Non-	Prior	Unscheduled		Paid or	Current
	Through	(with Notional)			Accrued	Supported	Unpaid	Interest	Optimal	Deferred	Unpaid
Class	Rate	Balance			Interest	Interest SF	Interest	Adjustments	Interest	Interest	Interest
					(1)	(2)	(3)	(4)	(5)=(1)-(2)+(3)+(4)	(6)	(7)=(5)-(6)
SUB-REMIC	5.97681%	254,900,638.00			1,269,576.13	-	-	-	1,269,576.13	1,224,888.63	0.00
1-A	4.81148%	325,633,654.87			1,305,649.18	-	-	-	1,305,649.18	1,305,649.18	-
Total		254,900,638.00			1,269,576.13	-	-	-	1,269,576.13	1,224,888.63	0.00
2-A	5.21876%	180,794,758.33			786,269.86	-	-	-	786,269.86	786,269.86	-
							Page 3 of 27				© COPYRIGHT 2004 Deutsche Bank
3-A	4.93957%	209,839,815.76			863,764.84	-	-	-	863,764.84	863,764.84	-
	IndyMac Residential Asset Securitization Trust 2004-A4
A-R		-			-	-	-	-	-	0.00	-
B-1	4.95111%	30,561,893.66			126,095.96	-	-	-	126,095.96	126,095.96	-
B-2	4.95111%	8,619,790.74			35,564.58	-	-	-	35,564.58	35,564.58	-
B-3	4.95111%	4,701,522.39			19,398.11	-	-	-	19,398.11	19,398.11	-
B-4	4.95111%	5,093,149.42			21,013.93	-	-	-	21,013.93	21,013.93	-
B-5	4.95111%	3,526,641.32			14,550.64	-	-	-	14,550.64	14,550.64	-
B-6	4.95111%	2,351,118.87			9,700.53	-	-	-	9,700.53	9,700.53	-
P		100.00			-	-	-	-	-	6,949.37	-
Total		771,122,445.37			3,182,007.64	-	-	-	3,182,007.64	3,188,957.01	-
							Page 3 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Master REMIC Series 2004-A4
	Collection Account Report for September 27, 2004 Distribution
	Certificate Payment Report for July 26, 2004 Distribution
	Distribution in Dollars - Current Period
					Prior						Current
	Class	Original			Principal			Total	Realized	Deferred	Principal
Class	Type	Face Value			Balance	Interest	Principal	Distribution	Losses	Interest	Balance
					(1)	(2)	(3)	(4)=(2)+(3)	(5)	(6)	(7)=(1)-(3)-(5)+(6)
A-1		62,906,667.00			62,906,667.00	262,111.11	1,129,601.16	1,391,712.27	-	-	61,777,065.84
A-2		12,581,333.00			12,581,333.00	15,202.44	225,920.22	241,122.66	-	-	12,355,412.78
A-3		-			-	68,673.11	-	68,673.11	-	-	-
A-4		5,000,000.00			5,000,000.00	22,916.67	-	22,916.67	-	-	5,000,000.00
A-5		17,000,000.00			17,000,000.00	77,916.67	-	77,916.67	-	-	17,000,000.00
A-6		255,000.00			255,000.00	1,168.75	-	1,168.75	-	-	255,000.00
A-7		14,618,000.00			14,618,000.00	66,999.17	-	66,999.17	-	-	14,618,000.00
A-8		220,000.00			220,000.00	1,008.33	-	1,008.33	-	-	220,000.00
A-9		9,100,000.00			9,100,000.00	41,708.33	-	41,708.33	-	-	9,100,000.00
A-10		59,076,391.00			59,076,391.00	270,766.79	44,687.50	315,454.29	-	-	59,031,703.50
A-11		9,750,000.00			9,750,000.00	-	-	-	-	-	9,750,000.00
A-12		3,000,000.00			3,000,000.00	13,750.00	-	13,750.00	-	-	3,000,000.00
A-13		23,889,609.00			23,889,609.00	32,848.21	150,612.85	183,461.06	-	-	23,738,996.15
A-14		-			-	126,415.85	-	126,415.85	-	-	-
A-15		21,500,000.00			21,500,000.00	98,541.67	-	98,541.67	-	-	21,500,000.00
PO		2,620,086.00			2,620,086.00	-	18,905.27	18,905.27	-	-	2,601,180.73
A-X		-			-	60,732.51	-	60,732.51	-	-	-
A-R		100.00			100.00	0.46	100.00	100.46	-	-	-
Total		241,517,186.00			241,517,186.00	1,160,760.07	1,569,827.00	2,730,587.07	-	-	239,947,359.00
Interest payments to Class PO represent payments of the Class PO Deferred Amount
	Interest Accrual Detail				Current Period Factor Information per $1,000 of Original Face
						Orig. Principal	Prior				Current
	Period	Period				(with Notional)	Principal			Total	Principal
Class	Starting	Ending		Method	Cusip	Balance	Balance	Interest	Principal	Distribution	Balance
							(1)	(2)	(3)	(4)=(2)+(3)	(5)
A-1	06/25/04	07/24/04		F-30/360	45660NJ22	62,906,667.00	1,000.000000	4.166667	17.956780	22.123446	982.043220
A-2	06/25/04	07/24/04		A-30/360	45660NJ30	12,581,333.00	1,000.000000	1.208333	17.956779	19.165112	982.043221
A-3	06/25/04	07/24/04		A-30/360	45660NJ48	12,581,333.00	1,000.000000	5.458333	-	5.458333	982.043221
A-4	06/25/04	07/24/04		F-30/360	45660NJ55	5,000,000.00	1,000.000000	4.583334	-	4.583334	1,000.000000
A-5	06/25/04	07/24/04		F-30/360	45660NJ63	17,000,000.00	1,000.000000	4.583334	-	4.583334	1,000.000000
A-6	06/25/04	07/24/04		F-30/360	45660NJ71	255,000.00	1,000.000000	4.583333	-	4.583333	1,000.000000
A-7	06/25/04	07/24/04		F-30/360	45660NJ89	14,618,000.00	1,000.000000	4.583334	-	4.583334	1,000.000000
A-8	06/25/04	07/24/04		F-30/360	45660NJ97	220,000.00	1,000.000000	4.583318	-	4.583318	1,000.000000
A-9	06/25/04	07/24/04		F-30/360	45660NK20	9,100,000.00	1,000.000000	4.583333	-	4.583333	1,000.000000
A-10	06/25/04	07/24/04		F-30/360	45660NK38	59,076,391.00	1,000.000000	4.583333	0.756436	5.339769	999.243564
A-11	06/25/04	07/24/04		F-30/360	45660NK46	9,750,000.00	1,000.000000	-	-	-	1,000.000000
A-12	06/25/04	07/24/04		F-30/360	45660NK53	3,000,000.00	1,000.000000	4.583333	-	4.583333	1,000.000000
A-13	06/25/04	07/24/04		A-30/360	45660NK61	23,889,609.00	1,000.000000	1.375000	6.304534	7.679534	993.695466
A-14	06/25/04	07/24/04		A-30/360	45660NK79	23,889,609.00	1,000.000000	5.291667	-	5.291667	993.695466
A-15	06/25/04	07/24/04		F-30/360	45660NK87	21,500,000.00	1,000.000000	4.583333	-	4.583333	1,000.000000
PO	06/25/04	07/24/04		F-30/360	45660NK95	2,620,086.00	1,000.000000	-	7.215515	7.215515	992.784485
A-X	06/25/04	07/24/04		A-30/360	45660NL29	254,900,538.00	1,000.000000	0.238260	-	0.238260	596.094072
A-R	06/25/04	07/24/04		F-30/360	45660NL37	100.00	1,000.000000	4.600000	1,000.000000	1,004.600000	-
							Page 4 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A4
	Collateralized Asset-Backed Bonds
	Master REMIC Series 2004-A4
	Certificate Payment Report for July 26, 2004 Distribution
	Distribution in Dollars - to Date
											Current
	Original				Unscheduled	Scheduled	Total	Total	Realized	Deferred	Principal
Class	Face Value		Interest		Principal	Principal	Principal	Distribution	Losses	Interest	Balance
	(1)		(2)		(3)	(4)	(5)=(3)+(4)	(6)=(2)+(5)	(7)	(8)	(9)=(1)-(5)-(7)+(8)
A-1	62,906,667.00		262,111.11		950,591.52	179,009.64	1,129,601.16	1,391,712.27	-	-	61,777,065.84
A-2	12,581,333.00		15,202.44		190,118.29	35,801.93	225,920.22	241,122.66	-	-	12,355,412.78
A-3	-		68,673.11		-	-	-	68,673.11	-	-	-
A-4	5,000,000.00		22,916.67		-	-	-	22,916.67	-	-	5,000,000.00
A-5	17,000,000.00		77,916.67		-	-	-	77,916.67	-	-	17,000,000.00
A-6	255,000.00		1,168.75		-	-	-	1,168.75	-	-	255,000.00
A-7	14,618,000.00		66,999.17		-	-	-	66,999.17	-	-	14,618,000.00
A-8	220,000.00		1,008.33		-	-	-	1,008.33	-	-	220,000.00
A-9	9,100,000.00		41,708.33		-	-	-	41,708.33	-	-	9,100,000.00
A-10	59,076,391.00		270,766.79		37,605.80	7,081.70	44,687.50	315,454.29	-	-	59,031,703.50
A-11	9,750,000.00		-		-	-	-	-	-	-	9,750,000.00
A-12	3,000,000.00		13,750.00		-	-	-	13,750.00	-	-	3,000,000.00
A-13	23,889,609.00		32,848.21		126,745.00	23,867.85	150,612.85	183,461.06	-	-	23,738,996.15
A-14	-		126,415.85		-	-	-	126,415.85	-	-	-
A-15	21,500,000.00		98,541.67		-	-	-	98,541.67	-	-	21,500,000.00
PO	2,620,086.00		-		15,909.32	2,995.95	18,905.27	18,905.27	-	-	2,601,180.73
A-X	-		60,732.51		-	-	-	60,732.51	-	-	-
A-R	100.00		0.46		84.15	15.85	100.00	100.46	-	-	-
Total	241,517,186.00		1,160,760.07		1,321,054.08	248,772.92	1,569,827.00	2,730,587.07	-	-	239,947,359.00
	Interest Detail
	Pass-	Prior Principal				Non-	Prior	Unscheduled		Paid or	Current
	Through	(with Notional)			Accrued	Supported	Unpaid	Interest	Optimal	Deferred	Unpaid
Class	Rate	Balance			Interest	Interest SF	Interest	Adjustments	Interest	Interest	Interest
					(1)	(2)	(3)	(4)	(5)=(1)-(2)+(3)+(4)	(6)	(7)=(5)-(6)
A-1	5.00000%	62,906,667.00			262,111.11	-	-	-	262,111.11	262,111.11	0.00
A-2	1.45000%	12,581,333.00			15,202.44	-	-	-	15,202.44	15,202.44	-
A-3	6.55000%	12,581,333.00			68,673.11	-	-	-	68,673.11	68,673.11	-
A-4	5.50000%	5,000,000.00			22,916.67	-	-	-	22,916.67	22,916.67	-
A-5	5.50000%	17,000,000.00			77,916.67	-	-	-	77,916.67	77,916.67	-
A-6	5.50000%	255,000.00			1,168.75	-	-	-	1,168.75	1,168.75	-
A-7	5.50000%	14,618,000.00			66,999.17	-	-	-	66,999.17	66,999.17	-
A-8	5.50000%	220,000.00			1,008.33	-	-	-	1,008.33	1,008.33	-
A-9	5.50000%	9,100,000.00			41,708.33	-	-	-	41,708.33	41,708.33	-
A-10	5.50000%	59,076,391.00			270,766.79	-	-	-	270,766.79	270,766.79	-
A-11	5.50000%	9,750,000.00			44,687.50	-	-	-	44,687.50	-	-
A-12	5.50000%	3,000,000.00			13,750.00	-	-	-	13,750.00	13,750.00	-
A-13	1.65000%	23,889,609.00			32,848.21	-	-	-	32,848.21	32,848.21	-
A-14	6.35000%	23,889,609.00			126,415.85	-	-	-	126,415.85	126,415.85	-
A-15	5.50000%	21,500,000.00			98,541.67	-	-	-	98,541.67	98,541.67	-
PO		2,620,086.00			-	-	-	-	-	-	-
A-X	0.28780%	254,900,538.00			60,732.51	-	-	-	60,732.51	60,732.51	-
A-R	5.50000%	100.00			0.46	-	-	-	0.46	0.46	0.00
Total		532,888,666.00			1,205,447.57	-	-	-	1,205,447.57	1,160,760.07	0.00
							Page 5 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A4
	Collateralized Asset-Backed Bonds
	Master REMIC Series 2004-A4
	Certificate Payment Report for July 26, 2004 Distribution
	Distribution in Dollars - Current Period
					Prior						Current
	Class	Original			Principal			Total	Realized	Deferred	Principal
Class	Type	Face Value			Balance	Interest	Principal	Distribution	Losses	Interest	Balance
					(1)	(2)	(3)	(4)=(2)+(3)	(5)	(6)	(7)=(1)-(3)-(5)+(6)
B-1		8,794,000.00			8,794,000.00	42,137.92	7,095.88	49,233.80	-	-	8,786,904.12
B-2		1,784,000.00			1,784,000.00	8,548.33	1,439.51	9,987.84	-	-	1,782,560.49
B-3		1,020,000.00			1,020,000.00	4,887.50	823.04	5,710.54	-	-	1,019,176.96
B-4		764,000.00			764,000.00	3,660.83	616.47	4,277.30	-	-	763,383.53
B-5		383,000.00			383,000.00	1,835.21	309.04	2,144.25	-	-	382,690.96
B-6		638,352.00			638,352.00	3,058.77	515.09	3,573.86	-	-	637,836.91
P		100.00			100.00	-	-	-	-	-	100.00
Total		13,383,452.00			13,383,452.00	64,128.56	10,799.03	74,927.59	-	-	13,372,652.97
Interest payments to Class PO represent payments of the Class PO Deferred Amount
	Interest Accrual Detail				Current Period Factor Information per $1,000 of Original Face
						Orig. Principal	Prior				Current
	Period	Period				(with Notional)	Principal			Total	Principal
Class	Starting	Ending		Method	Cusip	Balance	Balance	Interest	Principal	Distribution	Balance
							(1)	(2)	(3)	(4)=(2)+(3)	(5)
B-1	06/25/04	07/24/04		F-30/360	45660NL45	8,794,000.00	1,000.000000	4.791667	0.806900	5.598567	999.193100
B-2	06/25/04	07/24/04		F-30/360	45660NL52	1,784,000.00	1,000.000000	4.791665	0.806900	5.598565	999.193100
B-3	06/25/04	07/24/04		F-30/360	45660NL60	1,020,000.00	1,000.000000	4.791667	0.806902	5.598569	999.193098
B-4	06/25/04	07/24/04		F-30/360	45660NM69	764,000.00	1,000.000000	4.791662	0.806898	5.598560	999.193102
B-5	06/25/04	07/24/04		F-30/360	45660NM77	383,000.00	1,000.000000	4.791671	0.806893	5.598564	999.193107
B-6	06/25/04	07/24/04		F-30/360	45660NM85	638,352.00	1,000.000000	4.791667	0.806906	5.598573	999.193094
P	06/25/04	07/24/04		A-30/360		100.00	1,000.000000	-	-	-	1,000.000000
							Page 6 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A4
	Collateralized Asset-Backed Bonds
	Master REMIC Series 2004-A4
	Certificate Payment Report for July 26, 2004 Distribution
	Distribution in Dollars - to Date
											Current
	Original				Unscheduled	Scheduled	Total	Total	Realized	Deferred	Principal
Class	Face Value		Interest		Principal	Principal	Principal	Distribution	Losses	Interest	Balance
	(1)		(2)		(3)	(4)	(5)=(3)+(4)	(6)=(2)+(5)	(7)	(8)	(9)=(1)-(5)-(7)+(8)
B-1	8,794,000.00		42,137.92		5,971.38	1,124.50	7,095.88	49,233.80	-	-	8,786,904.12
B-2	1,784,000.00		8,548.33		1,211.39	228.12	1,439.51	9,987.84	-	-	1,782,560.49
B-3	1,020,000.00		4,887.50		692.61	130.43	823.04	5,710.54	-	-	1,019,176.96
B-4	764,000.00		3,660.83		518.78	97.69	616.47	4,277.30	-	-	763,383.53
B-5	383,000.00		1,835.21		260.07	48.97	309.04	2,144.25	-	-	382,690.96
B-6	638,352.00		3,058.77		433.46	81.63	515.09	3,573.86	-	-	637,836.91
P	100.00		-		1,330,141.78	-	-	-	-	-	100.00
Total	13,383,452.00		64,128.56		1,339,229.47	1,711.34	10,799.03	74,927.59	-	-	13,372,652.97
	Interest Detail
	Pass-	Prior Principal				Non-	Prior	Unscheduled		Paid or	Current
	Through	(with Notional)			Accrued	Supported	Unpaid	Interest	Optimal	Deferred	Unpaid
Class	Rate	Balance			Interest	Interest SF	Interest	Adjustments	Interest	Interest	Interest
					(1)	(2)	(3)	(4)	(5)=(1)-(2)+(3)+(4)	(6)	(7)=(5)-(6)
B-1	5.75000%	8,794,000.00			42,137.92	-	-	-	42,137.92	42,137.92	-
B-2	5.75000%	1,784,000.00			8,548.33	-	-	-	8,548.33	8,548.33	-
B-3	5.75000%	1,020,000.00			4,887.50	-	-	-	4,887.50	4,887.50	-
B-4	5.75000%	764,000.00			3,660.83	-	-	-	3,660.83	3,660.83	-
B-5	5.75000%	383,000.00			1,835.21	-	-	-	1,835.21	1,835.21	-
B-6	5.75000%	638,352.00			3,058.77	-	-	-	3,058.77	3,058.77	-
P		100.00			-	-	-	-	-	-	0.00
Total		13,383,452.00			64,128.56	-	-	-	64,128.56	64,128.56	0.00
							Page 7 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A4
	Collateralized Asset-Backed Bonds
	Series 2004-A4
	Collection Account Report for July 26, 2004 Distribution
	Collection Account Report
SUMMARY					GROUP 3	GROUP 2	GROUP 1	TOTAL
	Principal Collections				1,973,276.57	1,389,684.65	5,929,984.27	19,~~535~~292,~~938~~945.5349
	Principal Withdrawals				0.00	0.00	0.00	0.00
	Principal Other Accounts				0.00	0.00	0.00	0.00
	TOTAL PRINCIPAL				1,973,276.57	1,389,684.65	5,929,984.27	19,~~535~~292,~~938~~945.5349
	Interest Collections				947,096.86	863,234.81	1,439,220.93	13,~~331~~249,~~534~~552.4460
	Interest Withdrawals				0.00	0.00	0.00	~~(61,958~~0.~~31)~~00
	Interest Other Accounts				0.00	0.00	6,949.37	06,949.0037
	TOTAL INTEREST							1,269,576.13
	Interest Fees				(17,220.56)	(17,147.05)	(33,177.34)	(67,544.96)
	TOTAL AVAILABLE FUNDS TO BONDHOLDERS							2,805,514.66
	TOTAL INTEREST				929,876.30	846,087.76	1,412,992.96	3,188,957.01
	Interest Payable to Bondholders							1,269,576.13
	TOTAL AVAILABLE FUNDS TO BONDHOLDERS				2,903,152.87	2,235,772.41	7,342,977.23	12,481,902.50
	Principal Payment Amount Payable to Bondholders							1,535,938.53
	Interest Payable to Bondholders				929,876.30	846,087.76	1,412,992.96	3,188,957.01
PRINCIPAL - COLLECTIONS					GROUP 3	GROUP 2	GROUP 1	TOTAL
	Scheduled Principal				64,419.45	77,266.29	116,995.97	~~250~~258,~~484~~681.2571
	Curtailments				90,202.28	112,541.43	97,840.28	~~(198~~300,~~014~~583.~~68)~~99
	Prepayments in Full				1,818,654.84	1,199,876.93	5,460,199.74	18,~~483~~478,~~468~~731.9651
	Repurchases/Substitutions				0.00	0.00	254,948.28	0254,948.0028
	Liquidations				0.00	0.00	0.00	0.00
	Insurance Principal				0.00	0.00	0.00	0.00
	Other Additional Principal				0.00	0.00	0.00	0.00
	LESS: Delinquent Principal				(50,346.82)	(56,616.77)	(95,018.55)	(9201,~~901~~982.3614)
	LESS: Realized Losses				0.00	0.00	0.00	0.00
	PLUS: Recoveries				0.00	0.00	0.00	0.00
	PLUS: Substitution Shortfall Principal				0.00	0.00	0.00	0.00
	PLUS: Principal Loan Adjustments				0.00	0.00	0.00	0.00
	PLUS: Principal Advanced				50,346.82	56,616.77	95,018.55	9201,~~901~~982.3614
	TOTAL PRINCIPAL				1,973,276.57	1,389,684.65	5,929,984.27	19,~~535~~292,~~938~~945.5349
				Page 8 of 27				© COPYRIGHT 2004 Deutsche Bank
				Page 4 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A4
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Series 2004-A4
	Collection Account Report for September 27, 2004 Distribution
	Collection Account Report for July 26, 2004 Distribution
	Collection Account Report
PRINCIPAL - WITHDRAWALS					GROUP 3	GROUP 2	GROUP 1	TOTAL
SPACE INTENTIONALLY LEFT BLANK
PRINCIPAL - OTHER ACCOUNTS					GROUP 3	GROUP 2	GROUP 1	TOTAL
SPACE INTENTIONALLY LEFT BLANK
	TOTAL PRINCIPAL OTHER ACCOUNTS				0.00	0.00	0.00	0.00
INTEREST - COLLECTIONS					GROUP 3	GROUP 2	GROUP 1	TOTAL
	Scheduled Interest				1,001,411.51	907,695.02	1,515,841.66	13,~~333~~424,~~715~~948.8719
	Repurchases/Substitutions				0.00	0.00	1,248.18	01,248.0018
	Liquidations				0.00	0.00	0.00	0.00
	Insurance Interest				0.00	0.00	0.00	0.00
	Other Additional Interest				0.00	0.00	0.00	0.00
	LESS: Prepayment Interest Shortfalls				(142.93)	(793.98)	(4,255.89)	(25,~~033~~192.5080)
	LESS: Delinquent Interest				(775,998.82)	(666,902.39)	(1,085,208.14)	(452,~~789~~528,109.1435)
	LESS: Interest Realized Losses				0.00	0.00	0.00	0.00
	PLUS: Compensating Interest				142.93	793.98	4,255.89	25,~~033~~192.5080
	LESS: Civil Relief Act Shorfalls				0.00	0.00	0.00	0.00
	PLUS: Substiution Shortfall Interest				0.00	0.00	0.00	0.00
	PLUS: Interest Loan Adjustments				0.00	0.00	0.00	0.00
	LESS: Excess, Special Hazard, Fraud, & Bankruptcy Interest Losses				0.00	0.00	0.00	0.00
	Interest Advanced				721,684.17	622,442.18	1,007,339.23	432,~~607~~351,465.7158
	TOTAL INTEREST				947,096.86	863,234.81	1,439,220.93	13,~~331~~249,~~534~~552.4460
				Page 9 of 27				© COPYRIGHT 2004 Deutsche Bank
				Page 5 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A4
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Series 2004-A4
	Collection Account Report for September 27, 2004 Distribution
	Collection Account Report for July 26, 2004 Distribution
	Collection Account Report
INTEREST - WITHDRAWALS					GROUP 3	GROUP 2	GROUP 1	TOTAL
SPACE INTENTIONALLY LEFT BLANK
INTEREST - OTHER ACCOUNTS					GROUP 3	GROUP 2	GROUP 1	TOTAL
	Prepayment Penalties				0.00	0.00	6,949.37	06,949.0037
	TOTAL INTEREST OTHER ACCOUNTS				0.00	0.00	6,949.37	06,949.0037
INTEREST - FEES					GROUP 3	GROUP 2	GROUP 1	TOTAL
	Current Servicing Fees				16,279.31	16,336.43	31,716.21	5964,~~834~~331.1495
	Trustee Fees				941.25	810.62	1,461.13	23,~~124~~213.1701
	TOTAL INTEREST FEES							61,958.31
	PMI Fees				0.00	0.00	0.00	0.00
				Page 10 of 27				© COPYRIGHT 2004 Deutsche Bank
	TOTAL INTEREST FEES				17,220.56	17,147.05	33,177.34	67,544.96
	IndyMac Residential Asset Securitization Trust 2004-A4
				Page 6 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Series 2004-A4
	Credit Enhancement Report for September 27, 2004 Distribution
	Credit Enhancement Report for July 26, 2004 Distribution
	Credit Enhancement Report
ACCOUNTS					GROUP 3	GROUP 2	GROUP 1	TOTAL
SPACE INTENTIONALLY LEFT BLANK
INSURANCE					GROUP 3	GROUP 2	GROUP 1	TOTAL
SPACE INTENTIONALLY LEFT BLANK
STRUCTURAL FEATURES					GROUP 3	GROUP 2	GROUP 1	TOTAL
SPACE INTENTIONALLY LEFT BLANK
				Page 11 of 27				© COPYRIGHT 2004 Deutsche Bank
				Page 7 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A4
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Series 2004-A4
	Collateral Report for September 27, 2004 Distribution
	Collateral Report for July 26, 2004 Distribution
	Collateral Report
COLLATERAL					GROUP 3	GROUP 2	GROUP 1	TOTAL
	Loan Count:
	Original				468	989	1343	~~780~~2800
	Prior				461	981	1,318	-2,760
	Prefunding				-	-	-	-
	Scheduled Paid Offs				-	-	-	-
	Full Voluntary Prepayments				(4)	(6)	(20)	(530)
	Repurchases				-	-	(1)	-(1)
	Liquidations				-	-	-	-
	Current				457	975	1,297	~~775~~2,729
	Principal Balance:
	Original				229,579,204.05	196,864,609.76	357,937,644.19	~~254~~784,~~900~~381,~~538~~458.5800
	Prior				225,900,687.00	194,549,273.25	350,672,385.11	-771,122,345.36
	Prefunding				-	-	-	-
	Scheduled Principal				(64,419.45)	(77,266.29)	(116,995.97)	(~~250~~258,~~484~~681.2571)
	Partial and Full Voluntary Prepayments				(1,908,857.12)	(1,312,418.36)	(5,558,040.02)	(18,~~285~~779,~~454~~315.2850)
	Repurchases				-	-	(254,948.28)	-(254,948.28)
	Liquidations				-	-	-	-
	Current				223,927,410.43	193,159,588.60	344,742,400.84	~~253~~761,~~364~~829,~~600~~399.0587
PREFUNDING					GROUP 3	GROUP 2	GROUP 1	TOTAL
SPACE INTENTIONALLY LEFT BLANK
	Group 1		Group 3
	Group 2
Current Prin Balance by Groups (in millions of dollars)					Total Current Principal Balance (in millions of dollars)
				Page 12 of 27				© COPYRIGHT 2004 Deutsche Bank
				Page 8 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A4
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Series 2004-A4
	Collateral Report for September 27, 2004 Distribution
	Collateral Report for July 26, 2004 Distribution
	Collateral Report
CHARACTERISTICS					GROUP 3	GROUP 2	GROUP 1	TOTAL
	Weighted Average Coupon Original				5.333255%	5.601454%	5.202674%	65.~~278759~~340980%
	Weighted Average Coupon Prior				5.327332%	5.598090%	5.199703%	5.337238%
	Weighted Average Coupon Current				5.319567%	5.598757%	5.191478%	65.~~278759~~331755%
	Weighted Average Months to Maturity Original				356	359	359	~~352~~358
	Weighted Average Months to Maturity Prior				355	358	358	-357
	Weighted Average Months to Maturity Current				354	357	357	~~352~~356
	Weighted Avg Remaining Amortization Term Original				356	358	358	~~352~~357
	Weighted Avg Remaining Amortization Term Prior				355	357	357	-356
	Weighted Avg Remaining Amortization Term Current				354	356	356	~~352~~355
	Weighted Average Seasoning Original				2.15	1.82	1.92	71.3296
	Weighted Average Seasoning Prior				3.15	2.82	2.92	-2.96
	Weighted Average Seasoning Current				4.12	3.82	3.88	73.3293
Note: Original information refers to deal issue.
	Group 1		Group 3
	Group 2
WAC by Groups					Total WAC
WARAT by Groups					Total WARAT
Note: Dates correspond to distribution dates.
				Page 13 of 27				© COPYRIGHT 2004 Deutsche Bank
				Page 9 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A4
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Series 2004-A4
	Collateral Report for September 27, 2004 Distribution
	Collateral Report for July 26, 2004 Distribution
	Collateral Report
ARM CHARACTERISTICS					GROUP 3	GROUP 2	GROUP 1	TOTAL
	Weighted Average Margin Original				2.590%	2.609%	2.618%	~~0.000%~~
	Weighted Average Margin Prior				2.589%	2.608%	2.618%	~~0.000%~~
	Weighted Average Margin Current				2.588%	2.608%	2.617%	~~0.000%~~
	Weighted Average Max Rate Original				11.074%	11.442%	11.040%	~~0.000%~~
	Weighted Average Max Rate Prior				11.067%	11.438%	11.036%	~~0.000%~~
	Weighted Average Max Rate Current				11.058%	11.440%	11.028%	~~0.000%~~
	Weighted Average Min Rate Original				2.590%	2.609%	2.618%	~~0.000%~~
	Weighted Average Min Rate Prior				2.589%	2.608%	2.618%	~~0.000%~~
	Weighted Average Min Rate Current				2.588%	2.608%	2.617%	~~0.000%~~
	Weighted Average Cap Up Original				1.773%	1.596%	1.515%	~~0.000%~~
	Weighted Average Cap Up Prior				1.776%	1.599%	1.514%	~~0.000%~~
	Weighted Average Cap Up Current				1.772%	1.600%	1.514%	~~0.000%~~
	Weighted Average Cap Down Original				1.773%	1.596%	1.515%	~~0.000%~~
	Weighted Average Cap Down Prior				1.776%	1.599%	1.514%	~~0.000%~~
	Weighted Average Cap Down Current				1.772%	1.600%	1.514%	~~0.000%~~
Note: Original information refers to deal issue.
SERVICING FEES / ADVANCES					GROUP 3	GROUP 2	GROUP 1	TOTAL
	Current Servicing Fees				16,279.31	16,336.43	31,716.21	5964,~~834~~331.1495
	Delinquent Servicing Fees				54,314.65	44,460.21	77,868.91	2176,~~181~~643.4277
	TOTAL SERVICING FEES				70,593.96	60,796.64	109,585.12	62240,~~015~~975.5672
	Total Servicing Fees				70,593.96	60,796.64	109,585.12	62240,~~015~~975.5672
	Compensating Interest				(142.93)	(793.98)	(4,255.89)	(25,~~033~~192.5080)
	Delinquent Servicing Fees				(54,314.65)	(44,460.21)	(77,868.91)	(2176,~~181~~643.4277)
	COLLECTED SERVICING FEES				16,136.38	15,542.45	27,460.32	5759,~~800~~139.6415
	Total Advanced Principal For Current Payment Date				50,346.82	56,616.77	95,018.55	9201,~~901~~982.3614
	Total Advanced Interest For Current Payment Date				721,684.17	622,442.18	1,007,339.23	432,~~607~~351,465.7158
	TOTAL ADVANCES FOR CURRENT PERIOD				772,030.99	679,058.95	1,102,357.78	532,~~509~~553,447.0772
ADDITIONAL COLLATERAL INFORMATION					GROUP 3	GROUP 2	GROUP 1	TOTAL
	Prepayment Interest Shortfall (PPIS)				142.93	793.98	4,255.89	25,~~033~~192.5080
	Compensating Interest				(142.93)	(793.98)	(4,255.89)	(25,~~033~~192.5080)
	Net Prepayment Interest Shortfall (Net PPIS)				0.00	0.00	0.00	0.00
	Weighted Average Net Mortgage Rate				4.939567%	5.218757%	4.811478%	54.~~976807~~951755%
				Page 14 of 27				© COPYRIGHT 2004 Deutsche Bank
				Page 10 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A4
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Series 2004-A4
	Delinquency Report for September 27, 2004 Distribution
	Delinquency Report for July 26, 2004 Distribution
	Delinquency Report - Total
				<1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT		Balance		-###########	86,~~678~~445,~~532~~170.0833	-725,017.17	-194,217.67	87,~~678~~364,~~532~~405.0817
		% Balance		072.0084%	30.4385%	0.0010%	0.0003%	30.4397%
		# Loans		-1,968	2920	-3	-1	2924
		% # Loans		072.0011%	30.7473%	0.0011%	0.0004%	30.7488%
FORECLOSURE		Balance		-	-	-	-	-
		% Balance		0.00%	0.00%	0.00%	0.00%	0.00%
		# Loans		-	-	-	-	-
		% # Loans		0.00%	0.00%	0.00%	0.00%	0.00%
BANKRUPTCY		Balance		-	-	-	-	-
		% Balance		0.00%	0.00%	0.00%	0.00%	0.00%
		# Loans		-	-	-	-	-
		% # Loans		0.00%	0.00%	0.00%	0.00%	0.00%
REO		Balance		-	-	-	-	-
		% Balance		0.00%	0.00%	0.00%	0.00%	0.00%
		# Loans		-	-	-	-	-
		% # Loans		0.00%	0.00%	0.00%	0.00%	0.00%
TOTAL		Balance		-	86,~~678~~445,~~532~~170.0833	-725,017.17	-194,217.67	87,~~678~~364,~~532~~405.0817
		% Balance		0.00%	30.4385%	0.0010%	0.0003%	30.4397%
		# Loans		-	2920	-3	-1	2924
		% # Loans		0.00%	30.7473%	0.0011%	0.0004%	30.7488%
Note: <1 Payment = 1-30days, 1 Payment = 31-60days, 2 Payments = 61-90days, 3+ Payments = 91+
								6 Months Moving Average
1 or 2 Payments Delinquent					3 or More Payments Delinquent
Total Foreclosure					Total Bankruptcy and REO
Note: Dates correspond to distribution dates.
				Page 15 of 27				© COPYRIGHT 2004 Deutsche Bank
				Page 11 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A4
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Series 2004-A4
	Delinquency Report for September 27, 2004 Distribution
	REO Report for July 26, 2004 Distribution
	Delinquency Report - Group 1 Group
				<1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT		Balance		###########	5,355,967.01	513,897.17	-	5,869,864.18
		% Balance		70.54%	1.55%	0.15%	0.00%	1.70%
		# Loans		913	14	2	-	16
		% # Loans		70.39%	1.08%	0.15%	0.00%	1.23%
FORECLOSURE		Balance		-	-	-	-	-
		% Balance		0.00%	0.00%	0.00%	0.00%	0.00%
		# Loans		-	-	-	-	-
		% # Loans		0.00%	0.00%	0.00%	0.00%	0.00%
BANKRUPTCY		Balance		-	-	-	-	-
		% Balance		0.00%	0.00%	0.00%	0.00%	0.00%
		# Loans		-	-	-	-	-
		% # Loans		0.00%	0.00%	0.00%	0.00%	0.00%
REO		Balance		-	-	-	-	-
		% Balance		0.00%	0.00%	0.00%	0.00%	0.00%
		# Loans		-	-	-	-	-
		% # Loans		0.00%	0.00%	0.00%	0.00%	0.00%
TOTAL		Balance		-	5,355,967.01	513,897.17	-	5,869,864.18
		% Balance		0.00%	1.55%	0.15%	0.00%	1.70%
		# Loans		-	14	2	-	16
		% # Loans		0.00%	1.08%	0.15%	0.00%	1.23%
Note: <1 Payment = 1-30days, 1 Payment = 31-60days, 2 Payments = 61-90days, 3+ Payments = 91+
								6 Months Moving Average
1 or 2 Payments Delinquent					3 or More Payments Delinquent
Total Foreclosure					Total Bankruptcy and REO
Note: Dates correspond to distribution dates.
				Page 12 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Delinquency Report for September 27, 2004 Distribution
	Delinquency Report - Group 2 Group
				<1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT		Balance		###########	1,089,203.32	211,120.00	194,217.67	1,494,540.99
		% Balance		72.85%	0.56%	0.11%	0.10%	0.77%
		# Loans		704	6	1	1	8
		% # Loans		72.21%	0.62%	0.10%	0.10%	0.82%
FORECLOSURE		Balance		-	-	-	-	-
		% Balance		0.00%	0.00%	0.00%	0.00%	0.00%
		# Loans		-	-	-	-	-
		% # Loans		0.00%	0.00%	0.00%	0.00%	0.00%
BANKRUPTCY		Balance		-	-	-	-	-
		% Balance		0.00%	0.00%	0.00%	0.00%	0.00%
		# Loans		-	-	-	-	-
		% # Loans		0.00%	0.00%	0.00%	0.00%	0.00%
REO		Balance		-	-	-	-	-
		% Balance		0.00%	0.00%	0.00%	0.00%	0.00%
		# Loans		-	-	-	-	-
		% # Loans		0.00%	0.00%	0.00%	0.00%	0.00%
TOTAL		Balance		-	1,089,203.32	211,120.00	194,217.67	1,494,540.99
		% Balance		0.00%	0.56%	0.11%	0.10%	0.77%
		# Loans		-	6	1	1	8
		% # Loans		0.00%	0.62%	0.10%	0.10%	0.82%
Note: <1 Payment = 1-30days, 1 Payment = 31-60days, 2 Payments = 61-90days, 3+ Payments = 91+
								6 Months Moving Average
1 or 2 Payments Delinquent					3 or More Payments Delinquent
Total Foreclosure					Total Bankruptcy and REO
Note: Dates correspond to distribution dates.
				Page 13 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Delinquency Report for September 27, 2004 Distribution
	Delinquency Report - Group 3 Group
				<1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT		Balance		###########	-	-	-	-
		% Balance		76.35%	0.00%	0.00%	0.00%	0.00%
		# Loans		351	-	-	-	-
		% # Loans		76.81%	0.00%	0.00%	0.00%	0.00%
FORECLOSURE		Balance		-	-	-	-	-
		% Balance		0.00%	0.00%	0.00%	0.00%	0.00%
		# Loans		-	-	-	-	-
		% # Loans		0.00%	0.00%	0.00%	0.00%	0.00%
BANKRUPTCY		Balance		-	-	-	-	-
		% Balance		0.00%	0.00%	0.00%	0.00%	0.00%
		# Loans		-	-	-	-	-
		% # Loans		0.00%	0.00%	0.00%	0.00%	0.00%
REO		Balance		-	-	-	-	-
		% Balance		0.00%	0.00%	0.00%	0.00%	0.00%
		# Loans		-	-	-	-	-
		% # Loans		0.00%	0.00%	0.00%	0.00%	0.00%
TOTAL		Balance		-	-	-	-	-
		% Balance		0.00%	0.00%	0.00%	0.00%	0.00%
		# Loans		-	-	-	-	-
		% # Loans		0.00%	0.00%	0.00%	0.00%	0.00%
Note: <1 Payment = 1-30days, 1 Payment = 31-60days, 2 Payments = 61-90days, 3+ Payments = 91+
								6 Months Moving Average
1 or 2 Payments Delinquent					3 or More Payments Delinquent
Total Foreclosure					Total Bankruptcy and REO
Note: Dates correspond to distribution dates.
				Page 14 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	REO Report for September 27, 2004 Distribution
	REO Report - Mortgage Loans that Become REO During Current Distribution
SUMMARY				LOAN GROUP
Total Loan Count = 0				Loan Group 1 = ~~Fixed~~Group 1; REO Book Value = 000.00
Total Original Principal Balance = 000.00				Loan Group 2 = Group 2; REO Book Value = 000.00
Total Current Balance = 000.00				Loan Group 3 = Group 3; REO Book Value = 000.00
REO Book Value = 000.00
REO Book Value reported corresponds to total REO loans, including loans that become REO during current distribution.
Loan Number		Original	Stated		Current	State &
&		Principal	Principal	Paid to	Note	LTV at	Original	Origination
Loan Group		Balance	Balance	Date	Rate	Origination	Term	Date
SPACE INTENTIONALLY LEFT BLANK
				Page 16 of 27				© COPYRIGHT 2004 Deutsche Bank
				Page 15 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A4
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Series 2004-A4
	Prepayment Report for September 27, 2004 Distribution
	Prepayment Report for July 26, 2004 Distribution
	Prepayment Report - Voluntary Prepayments
VOLUNTARY PREPAYMENTS					GROUP 3	GROUP 2	GROUP 1	TOTAL
	Current
	Number of Paid in Full Loans				4	6	20	530
	Number of Repurchased Loans				-	-	1	-1
	Total Number of Loans Prepaid in Full				4	6	21	531
	Paid in Full Balance				1,818,654.84	1,199,876.93	5,460,199.74	18,~~483~~478,~~468~~731.9651
	Repurchased Loans Balance				-	-	254,948.28	-254,948.28
	Curtailments Amount				90,202.28	112,541.43	97,840.28	~~(198~~300,~~014~~583.~~68)~~99
	Total Prepayment Amount				1,908,857.12	1,312,418.36	5,812,988.30	19,~~285~~034,~~454~~263.2878
	Cumulative
	Number of Paid in Full Loans				11	13	45	569
	Number of Repurchased Loans				-	1	1	-2
	Total Number of Loans Prepaid in Full				11	14	46	571
	Paid in Full Balance				5,269,451.99	3,083,595.19	12,096,272.03	120,~~483~~449,~~468~~319.9621
	Repurchased Loans Balance				-	215,200.00	254,948.28	-470,148.28
	Curtailments Amount				184,981.04	172,740.04	487,752.31	~~(198~~845,~~014~~473.~~68)~~39
	Total Prepayment Amount				5,454,433.03	3,471,535.23	12,838,972.62	121,~~285~~764,~~454~~940.2888
SPACE INTENTIONALLY LEFT BLANK
Total Prepayments by Groups (in thousands of dollars)					Total Prepayments (in thousands of dollars)
				Page 17 of 27				© COPYRIGHT 2004 Deutsche Bank
				Page 16 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A4
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Series 2004-A4
	Prepayment Report for September 27, 2004 Distribution
	Prepayment Report for July 26, 2004 Distribution
	Prepayment Report - Voluntary Prepayments
VOLUNTARY PREPAYMENT RATES					GROUP 3	GROUP 2	GROUP 1	TOTAL
	SMM				0.85%	0.67%	1.66%	01.5017%
	3 Months Avg SMM				0.80%	0.59%	1.21%	0.93%
	12 Months Avg SMM
	Avg SMM Since Cut-off				0.80%	0.59%	1.21%	0.5093%
	CPR				9.68%	7.80%	18.18%	513.8919%
	3 Months Avg CPR				9.18%	6.87%	13.60%	10.65%
	12 Months Avg CPR
	Avg CPR Since Cut-off				9.18%	6.87%	13.60%	510.8965%
	PSA				1174.71%	1021.11%	2345.04%	~~402~~1676.3832%
	3 Months Avg PSA Approximation				1459.96%	1217.97%	2340.81%	1803.13%
	12 Months Avg PSA Approximation
	Avg PSA Since Cut-off Approximation				1459.96%	1217.97%	2340.81%	~~402~~1803.3813%
	Group 1		Group 3
	Group 2
CPR by Groups					Total CPR
PSA by Groups					Total PSA
				Page 18 of 27				© COPYRIGHT 2004 Deutsche Bank
				Page 17 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A4
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Series 2004-A4
	Prepayment Report for September 27, 2004 Distribution
	Prepayment Report for July 26, 2004 Distribution
	Prepayment Report - Voluntary Prepayments
	Group 1		Group 3
	Group 2
CPR Avg since Cut-Off by Groups					Total CPR Avg since Cut-Off
PSA Avg since Cut-Off by Groups					Total PSA Avg since Cut-Off
PREPAYMENT CALCULATION METHODOLOGY
Single Monthly Mortality (SMM): (Voluntary partial and full prepayments + Repurchases)/(Beg Principal Balance - Sched Principal)
Conditional Prepayment Rate (CPR): 1-((1-SMM)^12)
PSA Standard Prepayment Model: CPR/(0.02*min(30,WAS))
Average SMM over period between nth month and mth month (AvgSMMn,m): [(1-SMMn) * (1-SMMn+1) .......(1-SMMm)]^(1/months in period n,m)
Average CPR over period between the nth month and mth month (AvgCPRn,m): 1-((1-AvgSMMn,m)^12)
Average PSA Approximation over period between the nth month and mth month: AvgCPRn,m/(0.002*Avg WASn,m))
Average WASn,m: (min(30,WASn)+min(30,WASn+1)+.......+min(30,WASm)/(number of months in the period n,m)
Weighted Average Seasoning (WAS)
Note: Prepayment rates are calculated since deal issue date and include partial and full voluntary prepayments and repurchases.
Dates correspond to distribution dates.
				Page 19 of 27				© COPYRIGHT 2004 Deutsche Bank
				Page 18 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A4
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Series 2004-A4
	Prepayment Detail Report for September 27, 2004 Distribution
	Prepayment Detail Report for July 26, 2004 Distribution
	Prepayment Detail Report - Loans Prepaid in Full During Current Distribution
SUMMARY						LOAN GROUP
Total Loan Count = 5						Loan Group 1 = Fixed
Total Loan Count = 31						Loan Group 1 = Group 1
Total Original Principal Balance = 1,491,000.00
Total Original Principal Balance = 8,785,795.00						Loan Group 2 = Group 2
Total Prepayment Amount = 1,483,468.96
Total Prepayment Amount = 8,733,679.79						Loan Group 3 = Group 3
Loan Number			Original			Current	State &	Type Prepayment
&		Loan	Principal	Prepayment	Prepayment	Note	LTV at	&	Origination
Loan Group		Status	Balance	Amount	Date	Rate	Origination	Original Term	Date
2024089 1			363,000.00	357,496.53	Jun-28-04	6.000%	WA - 64.25%	Paid Off - 360	Jan-22-03
1800193 1			366,400.00	358,088.29	Aug-25-04	5.000%	CA - 80.00%	Paid Off - 360	Sep-12-02
3159229 1			164,000.00	162,729.28	Jun-21-04	6.875%	MA - 63.08%	Paid Off - 360	Aug-18-03
1969754 1			649,950.00	634,459.67	Aug-23-04	4.875%	RI - 65.00%	Paid Off - 360	Nov-25-02
3658057 1			180,000.00	180,000.00	Jun-01-04	6.750%	FL - 94.74%	Paid Off - 360	Jun-14-04
3486320 1			164,800.00	164,800.00	Aug-19-04	5.375%	CA - 80.00%	Paid Off - 360	Feb-23-04
3680018 1			337,000.00	336,709.85	Jun-21-04	6.750%	NC - 92.33%	Paid Off - 360	May-27-04
3588123 1			465,804.00	465,804.00	Aug-23-04	5.375%	CA - 80.00%	Paid Off - 360	May-24-04
3785007 1			447,000.00	446,533.30	Jul-08-04	5.750%	CA - 52.28%	Paid Off - 360	Mar-15-04
3626470 1			71,000.00	71,000.00	Aug-31-04	8.125%	FL - 94.96%	Paid Off - 360	Apr-29-04
					Page 20 of 27				© COPYRIGHT 2004 Deutsche Bank
3651578 1			119,464.00	119,176.32	Aug-30-04	5.000%	FL - 95.00%	Paid Off - 360	May-19-04
	IndyMac Residential Asset Securitization Trust 2004-A4
3662238 1			24,000.00	23,874.64	Aug-17-04	6.875%	IL - 75.00%	Paid Off - 360	May-20-04
3676626 1			119,200.00	119,200.00	Sep-15-04	5.375%	ID - 80.00%	Paid Off - 360	May-26-04
3684139 1			232,000.00	231,490.67	Sep-13-04	5.625%	CA - 80.00%	Paid Off - 360	May-03-04
3696564 1			104,000.00	103,508.82	Sep-15-04	5.500%	WA - 78.79%	Paid Off - 360	Apr-23-04
3719497 1			330,000.00	327,916.50	Aug-17-04	3.625%	CA - 68.00%	Paid Off - 360	Mar-12-04
3782940 1			278,400.00	278,400.00	Aug-17-04	5.125%	CA - 80.00%	Paid Off - 360	May-24-04
3786659 1			532,000.00	530,798.37	Sep-13-04	4.875%	NJ - 80.00%	Paid Off - 360	Apr-29-04
3811192 1			387,200.00	387,200.00	Aug-31-04	5.000%	CA - 80.00%	Paid Off - 360	May-26-04
3811287 1			322,700.00	321,415.62	Aug-16-04	5.375%	NH - 71.71%	Paid Off - 360	Jan-30-03
3826846 1			207,000.00	206,600.00	Aug-17-04	5.250%	LA - 66.77%	Paid Off - 360	Dec-02-03
3872778 1			167,772.00	167,596.84	Sep-01-04	5.750%	CO - 80.00%	Paid Off - 360	Jun-14-04
3874505 1			330,000.00	325,000.00	Aug-19-04	4.875%	CA - 70.21%	Paid Off - 360	May-20-04
3890692 1			317,870.00	317,870.00	Aug-31-04	7.250%	TX - 95.00%	Paid Off - 360	May-26-04
3909701 1			306,000.00	306,000.00	Sep-10-04	7.125%	CA - 90.00%	Paid Off - 360	Jun-03-04
3398350 2			126,000.00	125,506.38	Aug-20-04	6.125%	NV - 90.00%	Paid Off - 360	Mar-11-04
3620279 2			265,000.00	265,000.00	Aug-31-04	5.375%	IL - 56.99%	Paid Off - 360	Apr-26-04
3670016 2			187,000.00	186,635.57	Sep-01-04	6.125%	CA - 79.57%	Paid Off - 360	May-06-04
3703884 2			141,335.00	141,334.98	Aug-31-04	5.875%	NV - 80.00%	Paid Off - 360	Apr-21-04
3779639 2			154,400.00	154,400.00	Aug-30-04	6.750%	CO - 80.00%	Paid Off - 360	May-28-04
3785870 2			327,000.00	327,000.00	Aug-18-04	5.000%	FL - 65.00%	Paid Off - 360	Apr-22-04
1768756 3			348,000.00	338,085.54	Sep-10-04	5.375%	CA - 80.00%	Paid Off - 360	Jul-15-02
3470635 3			650,000.00	647,066.97	Aug-30-04	5.375%	NY - 72.22%	Paid Off - 360	Jun-16-03
3776140 3			348,000.00	347,288.66	Aug-30-04	5.875%	NJ - 80.00%	Paid Off - 360	May-12-04
3820401 3			487,500.00	486,213.67	Sep-03-04	4.500%	CA - 75.00%	Paid Off - 360	May-10-04
3643702 1			256,000.00	254,948.28	Aug-31-04	5.875%	CA - 80.00%	Repur/Subs - 360	Mar-19-04
					Page 19 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Series 2004-A4
	Realized Loss Report for September 27, 2004 Distribution
	Realized Loss Report for July 26, 2004 Distribution
	Realized Loss Report - Collateral
COLLATERAL REALIZED LOSSES					GROUP 3	GROUP 2	GROUP 1	TOTAL
	Current
	Number of Loans Liquidated				-	-	-	-
	Collateral Realized Loss/(Gain) Amount				-	-	-	-
	Net Liquidation Proceeds				-	-	-	-
	Cumulative
	Number of Loans Liquidated				-	-	-	-
	Collateral Realized Loss/(Gain) Amount				-	-	-	-
	Net Liquidation Proceeds				-	-	-	-
	Note: Collateral Realized Loss Amount may include adjustments to loans liquidated in prior periods.
	Current Realized Losses							0.00
	Supplemental Losses On Prior Liquidated Loans (LESS Recoveries)							0.00
	Supplemental Losses (Recoveries)							0.00
	Current Net Realized Losses (LESS Recoveries)							0.00
	Current Net Realized Losses (Recoveries)							0.00
	Prior Cumulative Realized Loss							0.00
	Current Net Realized Losses (LESS Recoveries)							0.00
	Current Net Realized Loss (Recoveries)							0.00
	Current Cumulative Realized Loss							0.00
	Current Special Hazard Loss Coverage Amount							27,~~695~~711,~~560~~223.0045
	Current Fraud Loss Coverage Amount							723,~~500~~531,~~000~~443.00
	Current Bankruptcy Loss Coverage Amount							~~150~~302,~~000~~827.00
	Class B-1 Write Down Amount							0.00
	Class B-2 Write Down Amount							0.00
	Class B-3 Write Down Amount							0.00
	Class B-4 Write Down Amount							0.00
	Class B-5 Write Down Amount							0.00
	Class B-6 Write Down Amount							0.00
							3 Months Moving Average
	Group 1		Group 3				3 Months Moving Average
	Group 2
Collateral Loss Severity Approximation by Groups					Collateral Loss Severity Approximation
				Page 21 of 27				© COPYRIGHT 2004 Deutsche Bank
				Page 20 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A4
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Series 2004-A4
	Realized Loss Report for September 27, 2004 Distribution
	Realized Loss Report for July 26, 2004 Distribution
	Realized Loss Report - Collateral
DEFAULT SPEEDS					GROUP 3	GROUP 2	GROUP 1	TOTAL
	MDR				0.00%	0.00%	0.00%	0.00%
	3 Months Avg MDR				0.00%	0.00%	0.00%	0.00%
	12 Months Avg MDR
	Avg MDR Since Cut-off				0.00%	0.00%	0.00%	0.00%
	CDR				0.00%	0.00%	0.00%	0.00%
	3 Months Avg CDR				0.00%	0.00%	0.00%	0.00%
	12 Months Avg CDR
	Avg CDR Since Cut-off				0.00%	0.00%	0.00%	0.00%
	SDA				0.00%	0.00%	0.00%	0.00%
	3 Months Avg SDA Approximation				0.00%	0.00%	0.00%	0.00%
	12 Months Avg SDA Approximation
	Avg SDA Since Cut-off Approximation				0.00%	0.00%	0.00%	0.00%
	Loss Severity Approximation for Current Period
	3 Months Avg Loss Severity Approximation
	12 Months Avg Loss Severity Approximation
	Avg Loss Severity Approximation Since Cut-off
	Group 1		Group 3
	Group 2
CDR by Groups					Total CDR
SDA by Groups					Total SDA
				Page 22 of 27				© COPYRIGHT 2004 Deutsche Bank
				Page 21 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A4
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Series 2004-A4
	Realized Loss Report for September 27, 2004 Distribution
	Realized Loss Report for July 26, 2004 Distribution
	Realized Loss Report - Collateral
	Group 1		Group 3
	Group 2
CDR Avg since Cut-Off by Groups					Total CDR Avg since Cut-Off
SDA Avg since Cut-Off by Groups					Total SDA Avg since Cut-Off
COLLATERAL REALIZED LOSS CALCULATION METHODOLOGY
Monthly Default Rate (MDR): (Beg Principal Balance of Liquidated Loans)/(Total Beg Principal Balance)
Conditional Default Rate (CDR): 1-((1-MDR)^12)
SDA Standard Default Assumption: CDR/IF(WAS<61,MIN(30,WAS)0.02,MAX(0.03,MIN(30,WAS)0.02-0.0095*(WAS-60)))
Average MDR over period between nth month and mth month (AvgMDRn,m): [(1-MDRn) * (1-MDRn+1) .......(1-MDRm)]^(1/months in period n,m)
Average CDR over period between the nth month and mth month (AvgCDRn,m): 1-((1-AvgMDRn,m)^12)
Average SDA Approximation over period between the nth month and mth month:
AvgCDRn,m/IF(Avg WASn,m<61,MIN(30,Avg WASn,m)0.02,MAX(0.03,MIN(30,Avg WASn,m)0.02-0.0095*(Avg WASn,m-60)))
Average WASn,m: (WASn + WASn+1 +.......+ WASm )/(number of months in the period n,m)
Loss Severity Approximation for current period: sum(Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans)
Average Loss Severity Approximation over period between nth month and mth month: Avg(Loss Severityn,m)
Note: Default rates are calculated since deal issue date and include realized gains and additional realized losses and gains from prior periods.
Dates correspond to distribution dates.
				Page 23 of 27				© COPYRIGHT 2004 Deutsche Bank
				Page 22 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A4
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Series 2004-A4
	Realized Loss Detail Report for September 27, 2004 Distribution
	Realized Loss Detail Report for July 26, 2004 Distribution
	Realized Loss Detail Report - Loans Liquidated During Current Distribution
SUMMARY							LOAN GROUP
Total Loan Count Current Losses = 0
Total Loan Count Revisions = 0						Loan Group 1 = ~~Fixed~~Group 1
Total Prior Principal Balance = 0.00						Loan Group 2 = Group 2
Total Current Realized Loss Amount = 0.00						Loan Group 3 = Group 3
Total Revisions Amount = 0.00
Total Realized Loss Amount = 0.00
Total Net Liquidation Proceeds = 0.00
Note: Total Realized Loss Amount may include adjustments to loans liquidated in prior periods.
Loan Number			Current	State &		Prior	Realized		Cumulative
&		Loan	Note	LTV at	Original	Principal	Loss/(Gain)	Realized	Realized
Loan Group		Status	Rate	Origination	Term	Balance	Revisions	Loss/(Gain)	Loss/(Gain)
SPACE INTENTIONALLY LEFT BLANK
					Page 24 of 27				© COPYRIGHT 2004 Deutsche Bank
					Page 23 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A4
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Series 2004-A4
	Triggers, Adj. Rate Cert. and Miscellaneous Report for September 27, 2004 Distribution
	Triggers, Adj. Rate Cert. and Miscellaneous Report for July 26, 2004 Distribution
	Triggers, Adj. Rate Cert. and Miscellaneous Report
TRIGGER EVENTS					GROUP 3	GROUP 2	GROUP 1	TOTAL
	Has the Optional Termination Date been reached?							No
	Have the Sr. Prepay Step Down Cond been satisfied?							No
	Has the Sr. Credit Supp. Depletion Date been reached?							No
	Have all prepayment penalties expired?							No
	Has the Spec. Haz. Coverage Term Date been reached?							No
	Has the Fraud LossCoverage Term. Date been reached?							No
	Has the Bank LossCoverage Term. Date been reached?							No
ADJUSTABLE RATE CERTIFICATE INFORMATION					GROUP 3	GROUP 2	GROUP 1	TOTAL
SPACE INTENTIONALLY LEFT BLANK
ADDITIONAL INFORMATION					GROUP 3	GROUP 2	GROUP 1	TOTAL
	Current Senior Percentage				92.890296%	92.930061%	92.859794%	9592.~~642215~~886457%
	Next Senior Percentage				0.000000%	0.000000%	0.000000%	940.~~666275~~000000%
	Current Subordinate Percentage				7.109704%	7.069939%	7.140206%	47.~~357785~~113543%
	Next Subordinate Percentage				0.000000%	0.000000%	0.000000%	50.~~333725~~000000%
	Current Senior Prepayment Percentage				100.000000%	100.000000%	100.000000%	100.000000%
	Next Projected Senior Prepayment Percentage				0.000000%	0.000000%	0.000000%	~~100~~0.000000%
	Current Subordinated Prepayment Percentage				0.000000%	0.000000%	0.000000%	0.000000%
	Next Projected Subordinated Prepayment Percentage				0.000000%	0.000000%	0.000000%	0.000000%
				Page 25 of 27				© COPYRIGHT 2004 Deutsche Bank
				Page 24 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A4
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Series 2004-A4
	Other Related Information for September 27, 2004 Distribution
	Other Related Information for July 26, 2004 Distribution
	Other Related Information
ADDITIONAL INFORMATION					GROUP 3	GROUP 2	GROUP 1	TOTAL
	Next Projected Pass-Through Rate for Class A-1							5.000000%
	Next Projected Pass-Through Rate for Class A-2							1.800000%
	Next Projected Pass-Through Rate for Class A-3							6.200000%
	Next Projected Pass-Through Rate for Class A-4							5.500000%
	Next Projected Pass-Through Rate for Class A-5							5.500000%
	Next Projected Pass-Through Rate for Class A-6							5.500000%
	Next Projected Pass-Through Rate for Class A-7							5.500000%
	Next Projected Pass-Through Rate for Class A-8							5.500000%
	Next Projected Pass-Through Rate for Class A-9							5.500000%
	Next Projected Pass-Through Rate for Class A-10							5.500000%
	Next Projected Pass-Through Rate for Class A-11							5.500000%
	Next Projected Pass-Through Rate for Class A-12							5.500000%
	Next Projected Pass-Through Rate for Class A-13							2.000000%
	Next Projected Pass-Through Rate for Class A-14							6.000000%
	Next Projected Pass-Through Rate for Class A-15							5.500000%
	Next Projected Pass-Through Rate for Class A-X							0.476104%
	Next Projected Pass-Through Rate for Class A-R							5.500000%
	Next Projected Pass-Through Rate for Class B-1							5.750000%
	Next Projected Pass-Through Rate for Class B-2							5.750000%
	Next Projected Pass-Through Rate for Class B-3							5.750000%
	Next Projected Pass-Through Rate for Class B-4							5.750000%
	Next Projected Pass-Through Rate for Class B-5							5.750000%
	Next Projected Pass-Through Rate for Class B-6							5.750000%
	Scheduled Principal
	1 Month Prior							0258,681.0071
	2 Months Prior							0262,571.0055
	3 Months Prior							0265,863.0099
	4 Months Prior							0.00
	5 Months Prior							0.00
	6 Months Prior							0.00
	7 Months Prior							0.00
	8 Months Prior							0.00
	9 Months Prior							0.00
	10 Months Prior							0.00
	11 Months Prior							0.00
	12 Months Prior							0.00
	Scheduled Principal on 60+ Day Delinquent Loans
	1 Month Prior							0323.0068
	2 Months Prior							0196.0007
	3 Months Prior							0.00
	4 Months Prior							0.00
	5 Months Prior							0.00
	6 Months Prior							0.00
	7 Months Prior							0.00
	8 Months Prior							0.00
	9 Months Prior							0.00
	10 Months Prior							0.00
	11 Months Prior							0.00
				Page 26 of 27				© COPYRIGHT 2004 Deutsche Bank
	12 Months Prior							0.00
	IndyMac Residential Asset Securitization Trust 2004-A4
				Page 25 of 26				© COPYRIGHT 2004 Deutsche Bank
	IndyMac INDX Mortgage Loan Trust 2004-AR4
	Collateralized Asset-Backed Bonds
	Series 2004-A4
	Additional Certificate Report for September 27, 2004 Distribution
	Additional Certificate Report for July 26, 2004 Distribution
	Additional Certificate Report
SPACE INTENTIONALLY LEFT BLANK
	CLASS	Net PPIS & Relief Act Shortfall Allocation	Unpaid Interest Amount Due	Unpaid Interest Paid	Remaining Unpaid Interest Amount
	CLASS
		0.00	0.00	0.00	0.00
				Page 27 of 27				© COPYRIGHT 2004 Deutsche Bank
		0.00	0.00	0.00	0.00
		0.00	0.00	0.00	0.00
		0.00	0.00	0.00	0.00
		0.00	0.00	0.00	0.00
		0.00	0.00	0.00	0.00
		0.00	0.00	0.00	0.00
		0.00	0.00	0.00	0.00
		0.00	0.00	0.00	0.00
		0.00	0.00	0.00	0.00
		0.00	0.00	0.00	0.00
				Page 26 of 26				© COPYRIGHT 2004 Deutsche Bank

Filing Compare · IndyMac Residential Asset Securitization Trust 2004-A4