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): ~~September~~October 2527, 2003 INDYMAC MBS, INC. as Depositor, IndyMac Bank, F.S.B. as Seller and as Master Servicer, and Deutsche Bank National Trust Company, as trustee under the Pooling and Servicing Agreement, dated as of June 1, 2003, providing for the issuance of IndyMac MBS, Inc. Residential Asset-Securitization Trust Series 2003-A8 Mortgage Pass-Through Certificates Series 2003-H. INDYMAC INC RESIDENTIAL ASSET SEC TRUST 2003-A8 (Exact name of Registrant as specified in its Charter) DELAWARE (State or Other Jurisdiction of Incorporation) 333-102888-06 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 Item 5. 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 7. Financial Statement and Exhibits Exhibits: (as noted in Item 5 above) Monthly Remittance Statement to the Certificateholders dated as of ~~September~~October 2527, 2003. SIGNATURE 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 it individual capacity, but solely as a duly authorized agent of the Registrant pursuant to the Pooling and Servicing Agreement, dated as of June 1, 2003. Date: Oct 0129, 2003 By: /s/ Katherine M. Wannenmacher Katherine M. Wannenmacher Vice President EXHIBIT INDEX DOCUMENT Monthly Remittance Statement to the Certificateholders dated as of ~~September~~October 2527, 2003.

	IndyMac Residential Asset Securitization Trust 2003-A8
	Mortgage Pass-Through Certificates
	September 25, 2003 Distribution
	October 27, 2003 Distribution
	Contents
			TABLE OF CONTENTS
								Page
			1.	Contents				1
			2.	Certificate Payment Report				2
			3.	Collection Account Report				4
			4.	Credit Enhancement Report				7
			5.	Collateral Report				8
			6.	Delinquency Report				11
			7.	REO Report				12
			8.	Prepayment Report				13
			9.	Prepayment Detail Report				16
			10.	Realized Loss Report				17
			11.	Realized Loss Detail Report				20
			12.	Triggers, Adj. Rate Cert. and Miscellaneous Report				21
			13.	Other Related Information				22
			14.	Additional Certificate Report				23
				Total Number of Pages				23
			CONTACTS
				Administrator: James Noriega
				Direct Phone Number: (714)247-6281
				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, 2003
	Certificate Insurer(s):							Closing Date: June 16, 2003
								First Payment Date: July 25, 2003
	Servicer(s):		IndyMac Bank Master Servicer
								Distribution Date: September 25, 2003
								Distribution Date: October 27, 2003
	Underwriter(s):		Greenwich Capital Markets					Record Date: ~~August~~September 2930, 2003
						Page 1 of 23					© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A8
	Mortgage Pass-Through Certificates
	Series 2003-A8
	Certificate Payment Report for September 25, 2003 Distribution
	Certificate Payment Report for October 27, 2003 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	NAS	163,542,461.00			~~147~~143,~~575~~964,~~160~~238.4018	~~461~~449,~~172~~888.3824	36,~~610~~374,~~922~~608.2213	46,~~072~~824,~~094~~496.6037	-	-	~~143~~137,~~964~~589,~~238~~630.1805
A-2	SEQ,AS	172,685,539.00			~~155~~152,~~825~~012,~~563~~767.3631	~~189~~186,~~587~~215.7764	36,~~812~~730,~~796~~989.0582	46,~~002~~917,~~383~~205.8246	-	-	~~152~~145,~~012~~281,~~767~~777.3149
A-3	SEQ,AS	-			-	~~719~~700,~~394~~525.6850	-	~~719~~700,~~394~~525.6850	-	-	-
A-4	SEQ,AS	100,000,000.00			9088,~~236~~028,~~602~~660.4877	~~199~~194,~~272~~396.5063	23,~~207~~897,~~941~~830.7162	24,~~407~~092,~~214~~227.2125	-	-	8884,~~028~~130,~~660~~830.7715
A-5	FLT,AS	30,000,000.00			2726,~~070~~408,~~980~~598.7524	9593,~~876~~530.3945	~~662~~1,~~382~~169,349.5119	~~758~~1,~~258~~262,879.9064	-	-	2625,~~408~~239,~~598~~249.2405
PO	PO,RSTP	1,646,421.00			1,643,714.30	-	-6,658.39	-6,658.39	-	-	1,~~643~~637,~~714~~055.3091
A-X	IO,NTL	-			-	~~162~~157,~~962~~799.1278	-	~~162~~157,~~962~~799.1278	-	-	-
A-R	R,AS	100.00			-	-	-	-	-	-	-
B-1	SUB,NAS	4,275,000.00			4,~~240~~219,~~290~~635.7823	16,~~784~~702.4872	2041,~~655~~746.5568	3758,~~440~~449.0340	-	-	4,~~219~~177,~~635~~888.2355
B-2	SUB,NAS	712,500.00			~~706~~703,~~715~~272.1354	2,~~797~~783.4179	36,~~442~~957.5978	69,~~240~~741.0057	-	-	~~703~~696,~~272~~314.5476
B-3	SUB,NAS	950,000.00			~~942~~937,~~286~~696.8472	3,~~729~~711.8972	49,~~590~~277.1204	812,~~320~~988.0176	-	-	~~937~~928,~~696~~419.7268
B-4	SUB,NAS	475,000.00			~~471~~468,~~143~~848.4236	1,~~864~~855.9486	24,~~295~~638.0652	46,~~160~~494.0038	-	-	~~468~~464,~~848~~209.3684
B-5	SUB,NAS	237,500.00			~~235~~234,~~571~~424.7118	~~932~~927.4793	12,~~147~~319.5326	23,~~080~~247.0019	-	-	~~234~~232,~~424~~104.1892
B-6	SUB,NAS	475,478.94			~~471~~469,~~618~~321.4710	1,~~866~~857.8273	24,~~297~~643.3813	46,~~164~~500.2086	-	-	~~469~~464,~~321~~677.1096
P	SUB	100.00			100.00	-	-	-	-	-	100.00
Total		475,000,099.94			~~429,~~419,~~747~~091,276.6492	1,~~856~~810,~~241~~195.8599	1018,~~328~~249,~~470~~018.7356	1220,~~184~~059,~~712~~214.5855	-	-	~~419~~400,~~091~~842,~~276~~258.9236
Class PO and Class AX payments adjusted to correct an overcollateralization of the Class PO Cert
	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				F-30/360	45660NRL1	163,542,461.00	~~902~~880.~~366025~~286608	2.~~819894~~750896	2238.~~079417~~978306	2441.~~899311~~729202	~~880~~841.~~286608~~308301
A-2				F-30/360	45660NRM9	172,685,539.00	~~902~~880.~~366025~~286608	1.~~097879~~078351	2238.~~079417~~978306	2340.~~177296~~056657	~~880~~841.~~286608~~308301
A-3				F-30/360	45660NRN7	172,685,539.00	~~902~~880.~~366025~~286608	4.~~165923~~056654	-	4.~~165923~~056654	~~880~~841.~~286608~~308301
A-4	08/25/03	0910/24/03		F-30/360	45660NRP2	100,000,000.00	~~902~~880.~~366025~~286608	1.~~992725~~943966	2238.~~079417~~978306	2440.~~072142~~922273	~~880~~841.~~286608~~308302
A-5	08/25/03	0910/24/03		A-30/360	45660NRQ0	30,000,000.00	~~902~~880.~~366025~~286608	3.~~195880~~117682	2238.~~079417~~978306	2542.~~275297~~095988	~~880~~841.~~286608~~308302
PO				F-30/360	45660NRR8	1,646,421.00	998.356010	-	-4.044160	-4.044160	~~998~~994.~~356010~~311850
A-X				A-30/360	45660NRS6	415,829,174.00	~~888~~864.~~913725~~671996	0.~~391897~~379482	-	0.~~391897~~379482	~~864~~824.~~671996~~956108
A-R				-	45660NRT4	100.00	-	-	-	-	-
B-1				F-30/360	45660NRV9	4,275,000.00	~~991~~987.~~880884~~049176	3.~~926194~~907069	49.~~831708~~765305	813.~~757902~~672374	~~987~~977.~~049176~~283871
B-2				F-30/360	45660NRW7	712,500.00	~~991~~987.~~880884~~049176	3.~~926189~~907074	49.~~831708~~765305	813.~~757898~~672378	~~987~~977.~~049176~~283871
B-3				F-30/360	45660NRU1	950,000.00	~~991~~987.~~880884~~049176	3.~~926200~~907074	49.~~831708~~765305	813.~~757908~~672378	~~987~~977.~~049176~~283871
B-4				F-30/360	45660NRH0	475,000.00	~~991~~987.~~880884~~049176	3.~~926189~~907074	49.~~831708~~765305	813.~~757898~~672378	~~987~~977.~~049176~~283871
B-5				F-30/360	45660NRJ6	237,500.00	~~991~~987.~~880884~~049176	3.~~926189~~907074	49.~~831708~~765305	813.~~757898~~672379	~~987~~977.~~049176~~283871
B-6				F-30/360	45660NRK3	475,478.94	~~991~~987.~~880886~~049177	3.~~926189~~907071	49.~~831708~~765172	813.~~757897~~672243	~~987~~977.~~049177~~284005
P				-		100.00	1,000.000000	-	-	-	1,000.000000
							Page 2 of 23				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A8
	Mortgage Pass-Through Certificates
	Series 2003-A8
	Certificate Payment Report for September 25, 2003 Distribution
	Certificate Payment Report for October 27, 2003 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	163,542,461.00		1,~~460~~910,~~449~~338.7600		1723,~~881~~724,~~823~~911.3267	12,~~696~~227,~~399~~919.5028	1925,~~578~~952,~~222~~830.8295	2127,~~038~~863,~~672~~168.5895	-	-	~~143~~137,~~964~~589,~~238~~630.1805
A-2	172,685,539.00		~~629~~815,~~235~~451.5822		1825,~~881~~051,~~532~~287.5218	12,~~791~~352,~~239~~474.1733	2027,~~672~~403,~~771~~761.6951	2128,~~302~~219,~~007~~212.2773	-	-	~~152~~145,~~012~~281,~~767~~777.3149
A-3	-		2,~~249~~949,~~347~~873.9343		-	-	-	2,~~249~~949,~~347~~873.9343	-	-	-
A-4	100,000,000.00		~~631~~825,~~060~~456.0669		1014,~~934~~506,~~055~~881.4088	1,~~037~~362,~~283~~287.8397	1115,~~971~~869,~~339~~169.2385	1216,~~602~~694,~~399~~626.2954	-	-	8884,~~028~~130,~~660~~830.7715
A-5	30,000,000.00		~~303~~397,~~623~~153.2469		34,~~280~~352,~~216~~064.6156	~~311~~408,~~185~~686.1539	34,~~591~~760,~~401~~750.7695	35,~~895~~157,~~025~~904.0064	-	-	2625,~~408~~239,~~598~~249.2405
PO	1,646,421.00		-		28,~~492~~595.0324	~~214~~769.6785	29,~~706~~365.7009	29,~~706~~365.7009	-	-	1,~~643~~637,~~714~~055.3091
A-X	-		~~522~~680,~~239~~038.0280		-	-	-	~~522~~680,~~239~~038.0280	-	-	-
A-R	100.00		0.40		92.07	7.93	100.00	100.40	-	-	-
B-1	4,275,000.00		5067,~~550~~253.4719		4987,~~664~~930.3617	59,~~700~~181.4128	5597,~~364~~111.7745	~~105~~164,~~915~~364.2464	-	-	4,~~219~~177,~~635~~888.2355
B-2	712,500.00		811,~~425~~208.0786		814,~~277~~655.3903	~~950~~1,530.0721	916,~~227~~185.4624	1727,~~652~~394.5310	-	-	~~703~~696,~~272~~314.5476
B-3	950,000.00		1114,~~233~~945.4416		1119,~~036~~540.5204	12,~~266~~040.7628	1221,~~303~~580.2832	2336,~~536~~525.7248	-	-	~~937~~928,~~696~~419.7268
B-4	475,000.00		57,~~616~~472.7258		59,~~518~~770.2602	~~633~~1,020.3814	610,~~151~~790.6416	1118,~~768~~262.3674	-	-	~~468~~464,~~848~~209.3684
B-5	237,500.00		23,~~808~~736.3528		24,~~759~~885.1301	~~316~~510.6907	35,~~075~~395.8208	59,~~884~~131.1736	-	-	~~234~~232,~~424~~104.1892
B-6	475,478.94		57,~~622~~480.3710		59,~~523~~779.8381	~~634~~1,021.0217	610,~~157~~800.8498	1118,~~780~~281.2108	-	-	~~469~~464,~~321~~677.1096
P	100.00		-		-	-	-	-	-	-	100.00
Total	475,000,099.94		57,~~880~~690,~~212~~408.4140		5167,~~062~~790,~~991~~392.4567	46,~~845~~367,~~831~~448.5891	5574,~~908~~157,~~823~~841.0258	6181,~~789~~848,~~035~~249.4398	-	-	~~419~~400,~~091~~842,~~276~~258.9236
	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	3.75000%	~~147~~143,~~575~~964,~~160~~238.4018			~~461~~449,~~172~~888.3824	-	-	-	~~461~~449,~~172~~888.3824	~~461~~449,~~172~~888.3824	-
A-2	1.~~46000~~47000%	~~155~~152,~~825~~012,~~563~~767.3631			~~189~~186,~~587~~215.7764	-	-	-	~~189~~186,~~587~~215.7764	~~189~~186,~~587~~215.7764	-
A-3	5.~~54000~~53000%	~~155~~152,~~825~~012,~~563~~767.3631			~~719~~700,~~394~~525.6850	-	-	-	~~719~~700,~~394~~525.6850	~~719~~700,~~394~~525.6850	-
A-4	2.65000%	9088,~~236~~028,~~602~~660.4877			~~199~~194,~~272~~396.5063	-	-	-	~~199~~194,~~272~~396.5063	~~199~~194,~~272~~396.5063	-
A-5	4.25000%	2726,~~070~~408,~~980~~598.7524			9593,~~876~~530.3945	-	-	-	9593,~~876~~530.3945	9593,~~876~~530.3945	-
PO		1,643,714.30			-	-	-	-	-	-	-
A-X	0.~~53004~~52757%	~~369~~359,~~636~~555,~~260~~841.1376			~~163~~158,~~266~~077.9010	~~304~~582.7810	-304.78	-	~~162~~157,~~962~~799.1278	~~162~~157,~~962~~799.1278	~~304~~582.7810
A-R	4.75000%	-			-	-	-	-	-	-	-
B-1	4.75000%	4,~~240~~219,~~290~~635.7823			16,~~784~~702.4872	-	-	-	16,~~784~~702.4872	16,~~784~~702.4872	-
B-2	4.75000%	~~706~~703,~~715~~272.1354			2,~~797~~783.4179	-	-	-	2,~~797~~783.4179	2,~~797~~783.4179	-
B-3	4.75000%	~~942~~937,~~286~~696.8472			3,~~729~~711.8972	-	-	-	3,~~729~~711.8972	3,~~729~~711.8972	-
B-4	4.75000%	~~471~~468,~~143~~848.4236			1,~~864~~855.9486	-	-	-	1,~~864~~855.9486	1,~~864~~855.9486	-
B-5	4.75000%	~~235~~234,~~571~~424.7118			~~932~~927.4793	-	-	-	~~932~~927.4793	~~932~~927.4793	-
B-6	4.75000%	~~471~~469,~~618~~321.4710			1,~~866~~857.8273	-	-	-	1,~~866~~857.8273	1,~~866~~857.8273	-
P		100.00			-	-	-	-	-	-	-
Total		~~954~~930,~~881~~659,~~571~~885.1399			1,~~856~~810,~~546~~473.6331	~~304~~582.7810	-304.78	-	1,~~856~~810,~~241~~195.8599	1,~~856~~810,~~241~~195.8599	~~304~~582.7810
							Page 3 of 23				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A8
	Mortgage Pass-Through Certificates
	Collection Account Report for September 25, 2003 Distribution
	Collection Account Report for October 27, 2003 Distribution
	Collection Account Report
SUMMARY								TOTAL
	Principal Collections							1018,~~328~~249,~~470~~018.7362
	Principal Withdrawals							0.00
	Principal Other Accounts							0.00
	TOTAL PRINCIPAL							1018,~~328~~249,~~470~~018.7362
	Interest Collections							1,~~969~~921,~~792~~072.7915
	Interest Withdrawals							(~~113~~110,~~550~~876.9422)
	Interest Other Accounts							0.00
	TOTAL INTEREST							1,~~856~~810,~~241~~195.8593
	TOTAL AVAILABLE FUNDS TO BONDHOLDERS							1220,~~184~~059,~~712~~214.5855
	Interest Payable to Bondholders							1,~~856~~810,~~241~~195.8593
	Principal Payment Amount Payable to Bondholders							1018,~~328~~249,~~470~~018.7362
PRINCIPAL - COLLECTIONS								TOTAL
	Scheduled Principal							1,~~580~~521,~~618~~062.4815
	Curtailments							~~201~~219,~~135~~929.6372
	Prepayments in Full							813,~~036~~833,~~832~~811.9820
	Repurchases/Substitutions							~~509~~2,~~883~~674,215.6455
	Liquidations							0.00
	Insurance Principal							0.00
	Other Additional Principal							0.00
	LESS: Delinquent Principal							(~~2,257~~354.4532)
	LESS: Realized Losses							0.00
	PLUS: Recoveries							0.00
	PLUS: Substitution Shortfall Principal							0.00
	PLUS: Principal Loan Adjustments							0.00
	PLUS: Principal Advanced							~~2,257~~354.4532
	TOTAL PRINCIPAL							1018,~~328~~249,~~470~~018.7362
				Page 4 of 23				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A8
	Mortgage Pass-Through Certificates
	Collection Account Report for September 25, 2003 Distribution
	Collection Account Report for October 27, 2003 Distribution
	Collection Account Report
PRINCIPAL - WITHDRAWALS								TOTAL
SPACE INTENTIONALLY LEFT BLANK
PRINCIPAL - OTHER ACCOUNTS								TOTAL
	Prefunding Release							0.00
INTEREST - COLLECTIONS								TOTAL
	Scheduled Interest							1,~~967~~907,~~613~~507.2922
	Repurchases/Substitutions							213,~~336~~592.9778
	Liquidations							0.00
	Insurance Interest							0.00
	Other Additional Interest							0.00
	LESS: Prepayment Interest Shortfalls							(822,~~952~~740.8876)
	LESS: Delinquent Interest							(~~2,970~~609.7422)
	LESS: Interest Realized Losses							0.00
	PLUS: Compensating Interest							822,~~952~~740.8876
	LESS: Civil Relief Act Shorfalls							0.00
	PLUS: Substiution Shortfall Interest							0.00
	PLUS: Interest Loan Adjustments							0.00
	LESS: Excess, Special Hazard, Fraud, & Bankruptcy Interest Losses							0.00
	Interest Advanced							~~2,813~~581.2737
	TOTAL INTEREST							1,~~969~~921,~~792~~072.7915
				Page 5 of 23				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A8
	Mortgage Pass-Through Certificates
	Collection Account Report for September 25, 2003 Distribution
	Collection Account Report for October 27, 2003 Distribution
	Collection Account Report
INTEREST - WITHDRAWALS								TOTAL
SPACE INTENTIONALLY LEFT BLANK
INTEREST - OTHER ACCOUNTS								TOTAL
	Prepayment Penalties							0.00
	TOTAL INTEREST OTHER ACCOUNTS							0.00
INTEREST - FEES								TOTAL
	Current Servicing Fees							~~110~~108,~~867~~256.0790
	Trustee Fees							2,~~683~~619.8732
	TOTAL INTEREST FEES							~~113~~110,~~550~~876.9422
				Page 6 of 23				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A8
	Mortgage Pass-Through Certificates
	Credit Enhancement Report for September 25, 2003 Distribution
	Credit Enhancement Report for October 27, 2003 Distribution
	Credit Enhancement Report
ACCOUNTS								TOTAL
SPACE INTENTIONALLY LEFT BLANK
INSURANCE								TOTAL
SPACE INTENTIONALLY LEFT BLANK
STRUCTURAL FEATURES								TOTAL
SPACE INTENTIONALLY LEFT BLANK
				Page 7 of 23				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A8
	Mortgage Pass-Through Certificates
	Collateral Report for September 25, 2003 Distribution
	Collateral Report for October 27, 2003 Distribution
	Collateral Report
COLLATERAL								TOTAL
	Loan Count:
	Original							1050
	Prior							~~986~~969
	Prefunding							-
	Scheduled Paid Offs							-
	Full Voluntary Prepayments							(1627)
	Repurchases							(15)
	Liquidations							-
	Current							~~969~~937
	Principal Balance:
	Original							466,773,042.90
	Prior							~~429,~~419,~~647~~091,176.7198
	Prefunding							-
	Scheduled Principal							(1,~~580~~521,~~618~~062.4815)
	Partial and Full Voluntary Prepayments							(814,~~237~~053,~~968~~740.6192)
	Repurchases							(~~509~~2,~~883~~674,215.6455)
	Liquidations							-
	Current							~~419~~400,~~091~~842,~~176~~158.9836
PREFUNDING								TOTAL
SPACE INTENTIONALLY LEFT BLANK
Current Prin Balance by Groups (in millions of dollars)					Total Current Principal Balance (in millions of dollars)
				Page 8 of 23				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A8
	Mortgage Pass-Through Certificates
	Collateral Report for September 25, 2003 Distribution
	Collateral Report for October 27, 2003 Distribution
	Collateral Report
CHARACTERISTICS								TOTAL
	Weighted Average Coupon Original							5.518635%
	Weighted Average Coupon Prior							5.~~510594~~504965%
	Weighted Average Coupon Current							5.~~504965~~500760%
	Weighted Average Months to Maturity Original							176
	Weighted Average Months to Maturity Prior							~~175~~174
	Weighted Average Months to Maturity Current							~~174~~173
	Weighted Avg Remaining Amortization Term Original							176
	Weighted Avg Remaining Amortization Term Prior							~~175~~174
	Weighted Avg Remaining Amortization Term Current							~~174~~173
	Weighted Average Seasoning Original							3.79
	Weighted Average Seasoning Prior							45.6553
	Weighted Average Seasoning Current							56.5332
Note: Original information refers to deal issue.
WAC by Groups					Total WAC
WARAT by Groups					Total WARAT
Note: Dates correspond to distribution dates.
				Page 9 of 23				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A8
	Mortgage Pass-Through Certificates
	Collateral Report for September 25, 2003 Distribution
	Collateral Report for October 27, 2003 Distribution
	Collateral Report
ARM CHARACTERISTICS								TOTAL
	Weighted Average Margin Original							0.000%
	Weighted Average Margin Prior							0.000%
	Weighted Average Margin Current							0.000%
	Weighted Average Max Rate Original							5.519%
	Weighted Average Max Rate Prior							5.~~411~~400%
	Weighted Average Max Rate Current							5.~~400~~393%
	Weighted Average Min Rate Original							5.519%
	Weighted Average Min Rate Prior							5.~~411~~400%
	Weighted Average Min Rate Current							5.~~400~~393%
	Weighted Average Cap Up Original							0.000%
	Weighted Average Cap Up Prior							0.000%
	Weighted Average Cap Up Current							0.000%
	Weighted Average Cap Down Original							0.000%
	Weighted Average Cap Down Prior							0.000%
	Weighted Average Cap Down Current							0.000%
Note: Original information refers to deal issue.
SERVICING FEES / ADVANCES								TOTAL
	Current Servicing Fees							~~110~~108,~~867~~256.0790
	Delinquent Servicing Fees							~~157~~27.4785
	TOTAL SERVICING FEES							~~111~~108,~~024~~284.5475
	Total Servicing Fees							~~111~~108,~~024~~284.5475
	Compensating Interest							(822,~~952~~740.8876)
	Delinquent Servicing Fees							(~~157~~27.4785)
	COLLECTED SERVICING FEES							~~101~~85,~~914~~516.1914
	Total Advanced Principal For Current Payment Date							~~2,257~~354.4532
	Total Advanced Interest For Current Payment Date							~~2,813~~581.2737
	TOTAL ADVANCES FOR CURRENT PERIOD							~~5,070~~935.7269
ADDITIONAL COLLATERAL INFORMATION								TOTAL
	Prepayment Interest Shortfall (PPIS)							822,~~952~~740.8876
	Compensating Interest							(822,~~952~~740.8876)
	Net Prepayment Interest Shortfall (Net PPIS)							0.00
	Weighted Average Net Mortgage Rate							5.~~187328~~183324%
				Page 10 of 23				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A8
	Mortgage Pass-Through Certificates
	Delinquency Report for September 25, 2003 Distribution
	Delinquency Report for October 27, 2003 Distribution
	Delinquency Report - Total
				<1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT		Balance		-	~~483,817.81~~-	104,~~438~~084.4513	-	~~588~~104,~~256~~084.2613
		% Balance		~~0.00%~~	0.1200%	0.0203%	0.00%	0.1403%
		# Loans		-	2-	1	-	31
		% # Loans		~~0.00%~~	0.2100%	0.1011%	0.00%	0.3111%
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		-	~~483,817.81~~-	104,~~438~~084.4513	-	~~588~~104,~~256~~084.2613
		% Balance		0.00%	0.1200%	0.0203%	0.00%	0.1403%
		# Loans		-	2-	1	-	31
		% # Loans		0.00%	0.2100%	0.1011%	0.00%	0.3111%
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 11 of 23				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A8
	Mortgage Pass-Through Certificates
	REO Report for September 25, 2003 Distribution
	REO Report for October 27, 2003 Distribution
	REO Report - Mortgage Loans that Become REO During Current Distribution
SUMMARY				LOAN GROUP
Total Loan Count = 0				Loan Group 1 = Group 1 Group; REO Book Value = 000.00
Total Original Principal Balance = 000.00
Total Current Balance = 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 12 of 23				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A8
	Mortgage Pass-Through Certificates
	Prepayment Report for September 25, 2003 Distribution
	Prepayment Report for October 27, 2003 Distribution
	Prepayment Report - Voluntary Prepayments
VOLUNTARY PREPAYMENTS								TOTAL
	Current
	Number of Paid in Full Loans							1627
	Number of Repurchased Loans							15
	Total Number of Loans Prepaid in Full							1732
	Paid in Full Balance							813,~~036~~833,~~832~~811.9820
	Repurchased Loans Balance							~~509~~2,~~883~~674,215.6455
	Curtailments Amount							~~201~~219,~~135~~929.6372
	Total Prepayment Amount							816,~~747~~727,~~852~~956.2547
	Cumulative
	Number of Paid in Full Loans							95122
	Number of Repurchased Loans							27
	Total Number of Loans Prepaid in Full							97129
	Paid in Full Balance							4963,~~493~~327,~~386~~198.8202
	Repurchased Loans Balance							13,~~034~~709,~~883~~099.6419
	Curtailments Amount							~~534~~754,~~104~~034.9163
	Total Prepayment Amount							5167,~~062~~790,~~375~~331.3784
SPACE INTENTIONALLY LEFT BLANK
Total Prepayments by Groups (in thousands of dollars)					Total Prepayments (in thousands of dollars)
				Page 13 of 23				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A8
	Mortgage Pass-Through Certificates
	Prepayment Report for September 25, 2003 Distribution
	Prepayment Report for October 27, 2003 Distribution
	Prepayment Report - Voluntary Prepayments
VOLUNTARY PREPAYMENT RATES								TOTAL
	SMM							24.0401%
	3 Months Avg SMM							3.7773%
	12 Months Avg SMM
	Avg SMM Since Cut-off							3.7783%
	CPR							2138.9678%
	3 Months Avg CPR							36.9359%
	12 Months Avg CPR
	Avg CPR Since Cut-off							3637.9340%
	PSA							~~1985~~3067.0433%
	3 Months Avg PSA Approximation							~~3964~~3325.3887%
	12 Months Avg PSA Approximation
	Avg PSA Since Cut-off Approximation							~~3964~~3685.3851%
CPR by Groups					Total CPR
PSA by Groups					Total PSA
				Page 14 of 23				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A8
	Mortgage Pass-Through Certificates
	Prepayment Report for September 25, 2003 Distribution
	Prepayment Report for October 27, 2003 Distribution
	Prepayment Report - Voluntary Prepayments
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/(0.02*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 15 of 23				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A8
	Mortgage Pass-Through Certificates
	Prepayment Detail Report for September 25, 2003 Distribution
	Prepayment Detail Report for October 27, 2003 Distribution
	Prepayment Detail Report - Loans Prepaid in Full During Current Distribution
SUMMARY						LOAN GROUP
Total Loan Count = 17						Loan Group 1 = Group 1 Group
Total Loan Count = 32						Loan Group 1 = Group 1 Group
Total Original Principal Balance = 9,211,117.00
Total Original Principal Balance = 17,586,900.00
Total Prepayment Amount = 8,546,716.62
Total Prepayment Amount = 16,508,026.75
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
7396 1			880,000.00	386,364.93	Aug-12-03	6.875%	CA - 31.40%	Paid Off - 180	May-10-93
15649 1			1,000,000.00	443,226.35	Sep-29-03	6.750%	NJ - 54.10%	Paid Off - 180	Jul-15-93
1884945 1			430,000.00	417,331.04	Aug-21-03	5.375%	CA - 54.78%	Paid Off - 180	Nov-21-02
539283 1			46,200.00	27,091.30	Sep-08-03	9.250%	NY - 70.00%	Paid Off - 180	Dec-17-99
1914154 1			637,000.00	616,681.18	Sep-02-03	5.875%	CA - 57.91%	Paid Off - 180	Oct-01-02
1901991 1			445,000.00	433,553.71	Sep-16-03	5.375%	NY - 55.63%	Paid Off - 180	Jan-14-03
1933502 1			403,000.00	380,512.92	Aug-19-03	5.375%	CA - 57.99%	Paid Off - 180	Oct-26-02
1920079 1			763,750.00	736,889.04	Jan-02-03	6.000%	CA - 65.00%	Paid Off - 180	Oct-25-02
1940667 1			365,750.00	353,843.38	Sep-03-03	5.625%	CA - 71.72%	Paid Off - 180	Oct-28-02
1921226 1			410,000.00	396,921.84	Jan-02-03	5.875%	CA - 31.54%	Paid Off - 180	Nov-08-02
1974451 1			999,990.00	973,129.89	Aug-22-03	6.500%	CA - 40.00%	Paid Off - 180	Nov-09-02
1929682 1			435,500.00	419,710.35	Sep-22-03	5.625%	CA - 44.21%	Paid Off - 180	Oct-16-02
2015921 1			380,000.00	371,810.98	Aug-26-03	5.625%	CA - 40.00%	Paid Off - 180	Jan-09-03
1932824 1			414,750.00	400,405.99	Sep-11-03	5.750%	NY - 75.00%	Paid Off - 180	Nov-26-02
2031364 1			358,000.00	345,994.54	Aug-22-03	6.375%	CA - 71.60%	Paid Off - 180	Dec-04-02
1959015 1			495,000.00	477,590.98	Sep-25-03	6.000%	RI - 30.00%	Paid Off - 180	Oct-31-02
2140430 1			472,300.00	462,196.35	Sep-02-03	5.750%	NJ - 73.80%	Paid Off - 180	Jan-13-03
1962311 1			630,000.00	607,843.02	Jan-02-03	6.000%	NJ - 70.00%	Paid Off - 180	Oct-25-02
2276211 1			425,000.00	418,859.22	Aug-15-03	5.500%	CA - 51.20%	Paid Off - 180	Mar-24-03
1981227 1			335,000.00	319,531.31	Jan-09-03	5.750%	CA - 55.83%	Paid Off - 180	Nov-14-02
2295345 1			650,000.00	640,608.19	Aug-18-03	5.500%	CA - 18.57%	Paid Off - 180	Mar-21-03
2014684 1			397,000.00	380,421.58	Sep-12-03	6.000%	WA - 60.15%	Paid Off - 180	Sep-11-02
2312495 1			418,500.00	412,639.41	Sep-02-03	5.875%	CA - 73.42%	Paid Off - 180	Mar-18-03
2031450 1			539,000.00	521,453.42	Sep-16-03	5.625%	CA - 67.80%	Paid Off - 180	Nov-20-02
2367084 1			825,000.00	815,797.45	Sep-02-03	5.125%	CA - 56.90%	Paid Off - 180	Apr-08-03
2043926 1			340,000.00	323,483.03	Sep-12-03	5.500%	CA - 28.33%	Paid Off - 180	Dec-05-02
2392065 1			375,000.00	370,860.20	Aug-29-03	5.250%	CA - 57.69%	Paid Off - 180	Apr-16-03
2045181 1			930,000.00	902,876.84	Sep-10-03	5.500%	CA - 68.89%	Paid Off - 180	Jan-14-03
2454917 1			493,000.00	489,454.62	Aug-19-03	5.500%	CA - 25.28%	Paid Off - 180	May-05-03
2051163 1			392,000.00	379,623.24	Sep-11-03	6.000%	CA - 80.00%	Paid Off - 180	Nov-21-02
2497895 1			585,000.00	580,748.68	Aug-19-03	5.375%	CA - 47.76%	Paid Off - 180	May-07-03
2068363 1			333,600.00	323,687.69	Sep-09-03	5.750%	NV - 66.72%	Paid Off - 180	Dec-12-02
2337497 1			513,577.00	509,883.64	Aug-31-03	5.500%	CA - 55.52%	Repur/Subs - 180	May-20-03
2120396 1			405,000.00	394,368.31	Sep-11-03	5.125%	CA - 79.99%	Paid Off - 180	Jan-17-03
2158842 1			1,100,000.00	1,080,495.60	Sep-05-03	5.750%	CA - 31.43%	Paid Off - 180	Mar-08-03
2197094 1			420,000.00	408,971.18	Sep-12-03	5.000%	CA - 45.65%	Paid Off - 180	Feb-18-03
2362645 1			959,000.00	941,277.78	Jan-03-03	5.250%	CA - 41.70%	Paid Off - 180	Mar-24-03
2367335 1			855,600.00	827,930.08	Sep-17-03	5.250%	CA - 32.91%	Paid Off - 180	Mar-20-03
2367516 1			510,500.00	477,248.24	Sep-24-03	5.250%	CA - 21.27%	Paid Off - 180	Mar-21-03
2370640 1			388,000.00	380,903.25	Sep-17-03	5.375%	CA - 49.11%	Paid Off - 180	Mar-28-03
2471301 1			937,000.00	923,320.11	Sep-25-03	5.375%	CA - 61.44%	Paid Off - 180	Apr-18-03
2530273 1			629,500.00	622,510.70	Sep-18-03	5.250%	CA - 50.77%	Paid Off - 180	May-08-03
2576186 1			650,000.00	645,226.66	Jan-02-03	5.250%	CA - 39.39%	Paid Off - 180	Jun-17-03
2613250 1			37,500.00	37,249.60	Sep-11-03	6.375%	NY - 75.00%	Paid Off - 180	Jun-24-03
1330227 1			665,000.00	616,853.95	Sep-30-03	7.250%	MI - 73.89%	Repur/Subs - 180	Oct-26-01
1752018 1			510,000.00	495,020.73	Sep-30-03	6.875%	NY - 60.71%	Repur/Subs - 180	Nov-07-02
2037312 1			496,000.00	477,534.65	Sep-30-03	6.875%	CA - 80.00%	Repur/Subs - 180	Dec-26-02
2075334 1			500,000.00	484,506.68	Sep-30-03	4.750%	CA - 31.25%	Repur/Subs - 180	Dec-20-02
2111383 1			617,000.00	600,299.54	Sep-30-03	4.750%	MA - 26.83%	Repur/Subs - 180	Jan-16-03
					Page 16 of 23				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A8
	Mortgage Pass-Through Certificates
	Realized Loss Report for September 25, 2003 Distribution
	Realized Loss Report for October 27, 2003 Distribution
	Realized Loss Report - Collateral
COLLATERAL REALIZED LOSSES								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 (Recoveries)							0.00
	Current Net Realized Losses (Recoveries)							0.00
	Prior Cumulative Realized Loss							0.00
	Current Net Realized Loss (Recoveries)							0.00
	Current Cumulative Realized Loss							0.00
	Current Special Hazard Loss Coverage Amount							2,985,500.00
	Current Fraud Loss Coverage Amount							4,289,089.00
	Current Bankruptcy Loss Coverage Amount							100,000.00
	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
Collateral Loss Severity Approximation by Groups					Collateral Loss Severity Approximation
				Page 17 of 23				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A8
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	Realized Loss Report for September 25, 2003 Distribution
	Realized Loss Report for October 27, 2003 Distribution
	Realized Loss Report - Collateral
DEFAULT SPEEDS								TOTAL
	MDR							0.00%
	3 Months Avg MDR							0.00%
	12 Months Avg MDR
	Avg MDR Since Cut-off							0.00%
	CDR							0.00%
	3 Months Avg CDR							0.00%
	12 Months Avg CDR
	Avg CDR Since Cut-off							0.00%
	SDA							0.00%
	3 Months Avg SDA Approximation							0.00%
	12 Months Avg SDA Approximation
	Avg SDA Since Cut-off Approximation							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
CDR by Groups					Total CDR
SDA by Groups					Total SDA
				Page 18 of 23				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A8
	Mortgage Pass-Through Certificates
	Realized Loss Report for September 25, 2003 Distribution
	Realized Loss Report for October 27, 2003 Distribution
	Realized Loss Report - Collateral
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 19 of 23				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A8
	Mortgage Pass-Through Certificates
	Realized Loss Detail Report for September 25, 2003 Distribution
	Realized Loss Detail Report for October 27, 2003 Distribution
	Realized Loss Detail Report - Loans Liquidated During Current Distribution
SUMMARY						LOAN GROUP
Total Loan Count = 0						Loan Group 1 = Group 1 Group
Total Original Principal Balance = 0.00
Total Prior Principal Balance = 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			Original	Prior		Current	State &
&		Loan	Principal	Principal	Realized	Note	LTV at	Original	Origination
Loan Group		Status	Balance	Balance	Loss/(Gain)	Rate	Origination	Term	Date
SPACE INTENTIONALLY LEFT BLANK
					Page 20 of 23				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A8
	Mortgage Pass-Through Certificates
	Triggers, Adj. Rate Cert. and Miscellaneous Report for September 25, 2003 Distribution
	Triggers, Adj. Rate Cert. and Miscellaneous Report for October 27, 2003 Distribution
	Triggers, Adj. Rate Cert. and Miscellaneous Report
TRIGGER EVENTS								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
	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								TOTAL
SPACE INTENTIONALLY LEFT BLANK
ADDITIONAL INFORMATION								TOTAL
	Current Senior Percentage							98.~~347820~~315190%
	Next Senior Percentage							98.~~315190~~255630%
	Current Subordinate Percentage							1.~~652180~~684810%
	Next Subordinate Percentage							1.~~684810~~744370%
	Current Senior Prepayment Percentage							100.000000%
	Next Projected Senior Prepayment Percentage							100.000000%
	Current Subordinated Prepayment Percentage							0.000000%
	Next Projected Subordinated Prepayment Percentage							0.000000%
	Next Projected Pass-Through Rate for Class A-4							2.650000%
	Next Projected Pass-Through Rate for Class A-5							1.~~460000~~470000%
	Next Projected Pass-Through Rate for Class A-6							5.~~540000~~530000%
	Next Projected Pass-Through Rate for Class A-X							0.~~527575~~520776%
	Next Projected Pass-Through Rate for all other classes							3.750000%
	Scheduled Principal
				Page 21 of 23				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A8
	Mortgage Pass-Through Certificates
	Other Related Information for September 25, 2003 Distribution
	Other Related Information for October 27, 2003 Distribution
	Other Related Information
ADDITIONAL INFORMATION								TOTAL
	1 Month Prior							1,~~580~~521,~~618~~062.4815
	2 Months Prior							1,~~608~~580,~~237~~618.5648
	3 Months Prior							1,~~656~~608,~~760~~237.8756
	4 Months Prior							01,656,760.0087
	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							~~352~~354.2632
	2 Months Prior							0352.0026
	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
	12 Months Prior							0.00
				Page 22 of 23				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A8
	Mortgage Pass-Through Certificates
	Additional Certificate Report for September 25, 2003 Distribution
	Additional Certificate Report for October 27, 2003 Distribution
	Additional Certificate Report
	CLASS				Net PPIS & Relief Act Shortfall Allocation	Unpaid Interest Amount Due	Unpaid Interest Paid	Remaining Unpaid Interest Amount
	A-1				0.00	0.00	0.00	0.00
	A-2				0.00	0.00	0.00	0.00
	A-3				0.00	0.00	0.00	0.00
	A-4				0.00	0.00	0.00	0.00
	A-5				0.00	0.00	0.00	0.00
	PO				0.00	0.00	0.00	0.00
	A-X				0.00	0304.0078	0.00	~~304~~582.7810
	A-R				0.00	0.00	0.00	0.00
	B-1				0.00	0.00	0.00	0.00
	B-2				0.00	0.00	0.00	0.00
	B-3				0.00	0.00	0.00	0.00
	B-4				0.00	0.00	0.00	0.00
	B-5				0.00	0.00	0.00	0.00
	B-6				0.00	0.00	0.00	0.00
				Page 23 of 23				© COPYRIGHT 2003 Deutsche Bank

Filing Compare · INDYMAC MBS INC RESIDENTIAL ASSET SEC TRUST 2003-A8