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): ~~September~~December 27, 2004 (Date of earliest event reported) Greenwich Capital Acceptance, Inc., (as depositor, under the Trust Agreement, dated as October 1, 2003, providing for the issuance of Washington Mutual Mortgage Trust Mortgage Pass-Through Certificates, Series 2003-R1) (Exact name of Registrant as specified in its Charter) DELAWARE (State or Other Jurisdiction of Incorporation) 333-108195-05 06-1199884 (Commission File Number) (I.R.S. Employer Identification No.) 600 Steamboat Road Greenwich, Connecticut 06830 (Address of principal executive offices) (Zip Code) Registrant's Telephone Number, Including Area Code: (203) 662-2700 (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 8.01 Other Events. This current report on Form 8-K relates to the monthly distribution reported to the holders of Washington Mutual Mortgage Trust Mortgage Pass-Through Certificates, Series 2003-R1, which was made on October 1, 2003 Item 9.01 Financial Statements and Exhibits. (c) Exhibits Exhibit No. Description 99.1 Monthly Remittance Statement to the Certificateholders dated as of ~~September~~December 27, 2004. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on behalf of the Registrant by the undersigned thereunto duly authorized. DEUTSCHE BANK NATIONAL TRUST COMPANY, IN ITS CAPACITY AS TRUSTEE UNDER THE TRUST AGREEMENT ON BEHALF OF GREENWICH CAPITAL ACCEPTANCE, INC., REGISTRANT Date: ~~Sep~~Dec 27, 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 ~~September~~December 27, 2004.

	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	September 27, 2004 Distribution
	December 27, 2004 Distribution
	Contents
			TABLE OF CONTENTS
								Page
			1.	Contents				1
			2.	Certificate Payment Report				2
			3.	Collection Account Report				8
			4.	Credit Enhancement Report				11
			5.	Collateral Report				12
			6.	Delinquency Report				15
			7.	REO Report				16
			8.	Prepayment Report				17
			9.	Realized Loss Report				20
			10.	Realized Loss Detail Report				23
			11.	Additional Certificate Report				24
				Total Number of Pages				24
			CONTACTS
				Administrator: Alan Sueda
				Administrator:
				Direct Phone Number: (714)247-6315
				Direct Phone Number:
				Address: Deutsche Bank
				1761 E. St. Andrew Place, Santa Ana, CA 92705
				Web Site: https://www.corporatetrust.db.com/invr
				Web Site: https://www.tss.db.com/invr
				Factor Information: (800) 735-7777
				Main Phone Number: (714) 247-6000
ISSUANCE INFORMATION
	Seller:		Washington Mutual Bank					Cut-Off Date: March 1, 2000
	Certificate Insurer(s):							Closing Date: March 31, 2000
								First Payment Date: April 25, 2000
	Servicer(s):		Washington Mutual Master Servicer
								Distribution Date: September 27, 2004
								Distribution Date: December 27, 2004
	Underwriter(s):		Lehman Brothers Underwriter					Record Date: ~~September~~December 24, 2004
								August 31, 2004
								November 30, 2004
						Page 1 of 24					© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Lower Tier REMIC Series 2000-1
	Certificate Payment Report for September 27, 2004 Distribution
	Certificate Payment Report for December 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)
LT-A1		4,799,976,000.00			-	-	-	-	-	-	-
LT-A2		1,599,992,000.00			1,~~072~~001,~~558~~112,~~909~~343.6307	3,~~590~~455,~~928~~730.8968	2719,~~980~~417,~~520~~428.7049	3122,~~571~~873,~~449~~159.5917	-	-	1981,~~044~~694,~~578,388~~914.9358
LT-M1		100,523,000.00			3533,~~359~~003,~~084~~703.9362	~~118~~113,~~382~~925.2719	~~922~~640,~~434~~135.7501	1754,~~040,817~~060.0220	-	-	3432,~~436~~363,~~650~~568.1861
LT-M2		83,769,000.00			2927,~~465~~503,~~904~~086.1135	9894,~~651~~937.8966	~~768~~533,~~695~~445.6284	~~867~~628,~~347~~383.5150	-	-	2826,~~697~~969,~~208~~640.4951
LT-M3		33,508,000.00			11,~~786~~001,~~361~~234.6454	3937,~~460~~975.7606	~~307~~213,~~478~~378.2534	~~346~~251,~~939~~353.0140	-	-	1110,~~478~~787,~~883~~856.3920
LT-B1		40,209,000.00			97,~~361~~398,~~034~~217.7701	3125,~~340~~537.7684	~~768~~533,~~695~~445.6284	~~800~~558,~~036~~983.3868	-	-	86,~~592~~864,~~339~~771.1517
LT-B2		23,455,000.00			142,848.74	~~478~~493.2610	-	~~478~~493.2610	-	-	142,848.74
LT-B3		20,104,869.34			19,962,020.60	6668,~~832~~906.8872	-	6668,~~832~~906.8872	-	-	19,962,020.60
LT-R		-			-	-	-	-	-	-	-
Total		6,701,536,869.34			1,~~178~~100,~~636~~123,~~164~~453.4392	3,~~946~~797,~~075~~506.7125	3021,~~747~~337,~~824~~833.9550	3425,~~693~~135,~~900~~339.6675	-	-	1,~~147~~078,~~888~~785,~~339~~620.4842
	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)
LT-A1				F-30/360		4,799,976,000.00	-	-	-	-	-
LT-A2				F-30/360		1,599,992,000.00	~~670~~625.~~352670~~698343	2.~~244342~~159842	1712.~~487913~~135953	1914.~~732255~~295796	~~652~~613.~~864757~~562389
LT-M1				F-30/360		100,523,000.00	~~351~~328.~~751191~~319923	1.~~177664~~133325	96.~~176355~~368045	107.~~354019~~501370	~~342~~321.~~574835~~951878
LT-M2				F-30/360		83,769,000.00	~~351~~328.~~751890~~320576	1.~~177666~~133327	96.~~176373~~368058	107.~~354039~~501385	~~342~~321.~~575517~~952518
LT-M3				F-30/360		33,508,000.00	~~351~~328.~~747691~~316657	1.~~177652~~133313	96.~~176264~~367982	107.~~353916~~501295	~~342~~321.~~571428~~948675
LT-B1				F-30/360		40,209,000.00	~~232~~183.~~809440~~994056	0.~~779446~~635127	1913.~~117502~~266827	1913.~~896948~~901954	~~213~~170.~~691938~~727229
LT-B2				F-30/360		23,455,000.00	6.090332	0.~~020391~~021023	-	0.~~020391~~021023	6.090332
LT-B3				F-30/360		20,104,869.34	992.894819	3.~~324214~~427365	-	3.~~324214~~427365	992.894819
LT-R				F-30/360		-	-	-	-	-	-
							Page 2 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Lower Tier REMIC Series 2000-1
	Certificate Payment Report for September 27, 2004 Distribution
	Certificate Payment Report for December 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)
LT-A1	4,799,976,000.00		535,861,077.70		4,620,338,847.23	179,637,152.77	4,799,976,000.00	5,335,837,077.70	-	-	-
LT-A2	1,599,992,000.00		~~377~~388,~~871~~335,~~941~~990.72		-	~~575~~638,~~569~~453,~~944~~418.5590	~~575~~638,~~569~~453,~~944~~418.5590	~~953~~1,~~441~~026,~~886~~789,409.2762	-	20,156,333.48	1981,~~044~~694,~~578,388~~914.9358
LT-M1	100,523,000.00		22,~~559~~904,~~263~~231.0974		-	6668,~~086~~159,~~349~~431.8239	6668,~~086~~159,~~349~~431.8239	8891,~~645~~063,~~612~~663.9113	-	-	3432,~~436~~363,~~650~~568.1861
LT-M2	83,769,000.00		18,~~699~~986,~~036~~510.2714		-	5556,~~071~~799,~~791~~359.5149	5556,~~071~~799,~~791~~359.5149	7375,~~770~~785,~~827~~869.7863	-	-	2826,~~697~~969,~~208~~640.4951
LT-M3	33,508,000.00		7,~~479~~594,~~692~~682.4803		-	22,~~029~~720,~~116~~143.6180	22,~~029~~720,~~116~~143.6180	2930,~~508~~314,~~809~~825.0983	-	-	1110,~~478~~787,~~883~~856.3920
LT-B1	40,209,000.00		8,~~888~~969,~~076~~742.3800		-	3133,~~616~~344,~~660~~228.8583	3133,~~616~~344,~~660~~228.8583	4042,~~504~~313,~~737~~970.2383	-	-	86,~~592~~864,~~339~~771.1517
LT-B2	23,455,000.00		4,~~687~~689,~~882~~344.6696		-	23,312,151.26	23,312,151.26	28,~~000~~001,~~033~~496.9222	-	-	142,848.74
LT-B3	20,104,869.34		5,~~122~~326,~~054~~400.0500		-	-	-	5,~~122~~326,~~054~~400.0500	142,848.74	-	19,962,020.60
LT-R	-		-		-	-	-	-	-	-	-
Total	6,701,536,869.34		~~981~~992,~~169~~667,~~024~~979.3529		4,620,338,847.23	~~953~~1,~~323~~022,~~167~~425,886.3743	5,~~573~~642,~~662~~764,~~014~~733.6066	6,~~554~~635,~~831~~432,~~038~~712.95	142,848.74	20,156,333.48	1,~~147~~078,~~888~~785,~~339~~620.4842
	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)
LT-A1	4.~~01760~~14227%	-			-	-	-	-	-	-	-
LT-A2	4.~~01760~~14227%	1,~~072~~001,~~558~~112,~~909~~343.6307			3,~~590~~455,~~928~~730.8968	-	-	-	3,~~590~~455,~~928~~730.8968	3,~~590~~455,~~928~~730.8968	-
LT-M1	4.~~01760~~14227%	3533,~~359~~003,~~084~~703.9362			~~118~~113,~~382~~925.2719	-	-	-	~~118~~113,~~382~~925.2719	~~118~~113,~~382~~925.2719	-
LT-M2	4.~~01760~~14227%	2927,~~465~~503,~~904~~086.1135			9894,~~651~~937.8966	-	-	-	9894,~~651~~937.8966	9894,~~651~~937.8966	-
LT-M3	4.~~01760~~14227%	11,~~786~~001,~~361~~234.6454			3937,~~460~~975.7606	-	-	-	3937,~~460~~975.7606	3937,~~460~~975.7606	-
LT-B1	4.~~01760~~14227%	97,~~361~~398,~~034~~217.7701			3125,~~340~~537.7684	-	-	-	3125,~~340~~537.7684	3125,~~340~~537.7684	-
LT-B2	4.~~01760~~14227%	142,848.74			~~478~~493.2610	-	-	-	~~478~~493.2610	~~478~~493.2610	-
LT-B3	4.~~01760~~14227%	19,962,020.60			6668,~~832~~906.8872	-	-	-	6668,~~832~~906.8872	6668,~~832~~906.8872	-
LT-R		-			-	-	-	-	-	-	-
Total		1,~~178~~100,~~636~~123,~~164~~453.4392			3,~~946~~797,~~075~~506.7125	-	-	-	3,~~946~~797,~~075~~506.7125	3,~~946~~797,~~075~~506.7125	-
							Page 3 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Upper Tier REMIC Series 2000-1
	Certificate Payment Report for September 27, 2004 Distribution
	Certificate Payment Report for December 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)
A1	STEP, FLT	4,799,976,000.00			-	-	-	-	-	-	-
A2	CSTR	1,599,992,000.00			1,~~072~~001,~~558~~112,~~909~~343.6307	3,~~662~~506,~~904~~847.4122	2719,~~980~~417,~~520~~428.7049	3122,~~643~~924,~~425~~275.1171	-	-	1981,~~044~~694,~~578,388~~914.9358
M1	MEZ, STEP	100,523,000.00			3533,~~359~~003,~~084~~703.9362	6573,~~311~~323.1823	~~922~~640,~~434~~135.7501	~~987~~713,~~745~~458.9324	-	-	3432,~~436~~363,~~650~~568.1861
M2	MEZ, STEP	83,769,000.00			2927,~~465~~503,~~904~~086.1135	6570,~~230~~575.1598	~~768~~533,~~695~~445.6284	~~833~~604,~~925~~021.7782	-	-	2826,~~697~~969,~~208~~640.4951
M3	MEZ, STEP	33,508,000.00			11,~~786~~001,~~361~~234.6454	3637,~~356~~230.01	~~307~~213,~~478~~378.2534	~~343~~250,~~834~~608.2635	-	-	1110,~~478~~787,~~883~~856.3920
B1	SUB, STEP	40,209,000.00			97,~~361~~398,~~034~~217.7701	4839,~~182~~370.0385	~~768~~533,~~695~~445.6284	~~816~~572,~~877~~816.6569	-	-	86,~~592~~864,~~339~~771.1517
B2	SUB, STEP	23,455,000.00			142,848.74	1,~~259~~252.0423	-	1,~~259~~252.0423	-	-	142,848.74
B3	SUB, CSTR	20,104,869.34			19,962,020.60	6668,~~832~~906.8872	-	6668,~~832~~906.8872	-	-	19,962,020.60
UT-R	R	-			-	-	-	-	-	-	-
Total		6,701,536,869.34			1,~~178~~100,~~636~~123,~~164~~453.4392	3,~~946~~797,~~075~~506.7024	3021,~~747~~337,~~824~~833.9550	3425,~~693~~135,~~900~~339.6574	-	-	1,~~147~~078,~~888~~785,~~339~~620.4842
	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)
A1	0811/2526/04	0912/26/04		A-Act/360	863572L68	4,799,976,000.00	-	-	-	-	-
A2				F-30/360	863572L76	1,599,992,000.00	~~670~~625.~~352670~~698343	2.~~289327~~191790	1712.~~487913~~135953	1914.~~777240~~327744	~~652~~613.~~864757~~562389
M1	0811/2526/04	0912/26/04		A-Act/360	863572L84	100,523,000.00	~~351~~328.~~751191~~319923	0.~~649714~~729417	96.~~176355~~368045	97.~~826069~~097463	~~342~~321.~~574835~~951878
M2	0811/2526/04	0912/26/04		A-Act/360	863572L92	83,769,000.00	~~351~~328.~~751890~~320576	0.~~778691~~842507	96.~~176373~~368058	97.~~955064~~210565	~~342~~321.~~575517~~952518
M3	0811/2526/04	0912/26/04		A-Act/360	863572M26	33,508,000.00	~~351~~328.~~747691~~316657	1.~~084995~~111078	96.~~176264~~367982	107.~~261259~~479060	~~342~~321.~~571428~~948675
B1	0811/2526/04	0912/26/04		A-Act/360	863572M34	40,209,000.00	~~232~~183.~~809440~~994056	10.~~198290~~979155	1913.~~117502~~266827	2014.~~315791~~245982	~~213~~170.~~691938~~727229
B2	0811/2526/04	0912/26/04		A-Act/360	863572M42	23,455,000.00	6.090332	0.~~053679~~053389	-	0.~~053679~~053389	6.090332
B3				F-30/360	863572M59	20,104,869.34	992.894819	3.~~324214~~427365	-	3.~~324214~~427365	992.894819
UT-R				F-30/360	863572M67	-	-	-	-	-	-
							Page 4 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Upper Tier REMIC Series 2000-1
	Certificate Payment Report for September 27, 2004 Distribution
	Certificate Payment Report for December 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)
A1	4,799,976,000.00		386,931,317.18		4,620,338,847.23	179,637,152.77	4,799,976,000.00	5,186,907,317.18	-	-	-
A2	1,599,992,000.00		~~537~~548,~~406~~070,~~505~~334.5692		~~527~~581,~~267~~711,~~220~~796.1630	4856,~~302~~741,~~724~~622.3959	~~575~~638,~~569~~453,~~944~~418.5590	1,~~112~~186,~~976~~523,~~450~~753.1182	-	20,156,333.48	1981,~~044~~694,~~578,388~~914.9358
M1	100,523,000.00		13,~~589~~793,~~868~~004.7859		6163,~~651~~446,~~254~~130.3852	4,~~435~~713,~~095~~300.4387	6668,~~086~~159,~~349~~431.8239	7981,~~676~~952,~~218~~435.6098	-	-	3432,~~436~~363,~~650~~568.1861
M2	83,769,000.00		12,~~541~~739,~~482~~141.6916		5052,~~976~~471,~~141~~871.3951	4,~~095~~327,~~650~~487.1298	5556,~~071~~799,~~791~~359.5149	6769,~~613~~538,~~274~~500.2065	-	-	2826,~~697~~969,~~208~~640.4951
M3	33,508,000.00		6,~~210~~316,~~653~~676.6774		20,~~390~~989,~~827~~119.1722	1,~~638~~731,~~289~~024.4358	22,~~029~~720,~~116~~143.6180	2829,~~239~~036,~~770~~820.2854	-	-	1110,~~478~~787,~~883~~856.3920
B1	40,209,000.00		10,~~729~~850,~~671~~027.4707		2930,~~141~~637,~~938~~669.8900	2,~~474~~706,~~721~~559.9783	3133,~~616~~344,~~660~~228.8583	4244,~~346~~194,~~332~~255.3290	-	-	86,~~592~~864,~~339~~771.1517
B2	23,455,000.00		8,~~637~~641,~~470~~077.9463		21,701,370.05	1,610,781.21	23,312,151.26	31,~~949~~953,~~622~~228.2089	-	-	142,848.74
B3	20,104,869.34		5,~~122~~326,~~054~~399.0297		-	-	-	5,~~122~~326,~~054~~399.0297	142,848.74	-	19,962,020.60
UT-R	-		-		-	-	-	-	-	-	-
Total	6,701,536,869.34		~~981~~992,~~169~~667,~~024~~979.3126		5,~~331~~391,~~467~~296,~~599~~803.2883	~~242~~251,~~194~~467,~~415~~929.3283	5,~~573~~642,~~662~~764,~~014~~733.6066	6,~~554~~635,~~831~~432,~~038~~712.9192	142,848.74	20,156,333.48	1,~~147~~078,~~888~~785,~~339~~620.4842
	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)
A1	12.~~90500~~47000%	-			-	-	-	-	-	-	-
A2	4.~~09813~~20354%	1,~~072~~001,~~558~~112,~~909~~343.6307			3,~~662~~506,~~904~~847.4122	-	-	-	3,~~662~~506,~~904~~847.4122	3,~~662~~506,~~904~~847.4122	-
M1	2.~~01500~~58000%	3533,~~359~~003,~~084~~703.9362			6573,~~311~~323.1823	-	-	-	6573,~~311~~323.1823	6573,~~311~~323.1823	-
M2	2.~~41500~~98000%	2927,~~465~~503,~~904~~086.1135			6570,~~230~~575.1598	-	-	-	6570,~~230~~575.1598	6570,~~230~~575.1598	-
M3	3.~~36500~~93000%	11,~~786~~001,~~361~~234.6454			3637,~~356~~230.01	-	-	-	3637,~~356~~230.01	3637,~~356~~230.01	-
B1	56.~~61500~~18000%	97,~~361~~398,~~034~~217.7701			4839,~~182~~370.0385	-	-	-	4839,~~182~~370.0385	4839,~~182~~370.0385	-
B2	~~9.61500%~~########	142,848.74			1,~~259~~252.0423	-	-	-	1,~~259~~252.0423	1,~~259~~252.0423	-
B3	4.~~01760~~14227%	19,962,020.60			6668,~~832~~906.8872	-	-	-	6668,~~832~~906.8872	6668,~~832~~906.8872	-
UT-R		-			-	-	-	-	-	-	-
Total		1,~~178~~100,~~636~~123,~~164~~453.4392			3,~~946~~797,~~075~~506.7024	-	-	-	3,~~946~~797,~~075~~506.7024	3,~~946~~797,~~075~~506.7024	-
							Page 5 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	A2-2 Components Series 2000-1
	Certificate Payment Report for September 27, 2004 Distribution
	Certificate Payment Report for December 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)
A1X		-			-	-	-	-	-	-	-
A2X		-			-	3,~~590~~455,~~928~~730.8968	-	3,~~590~~455,~~928~~730.8968	-	-	-
M1X		-			-	5340,~~071~~601.0996	-	5340,~~071~~601.0996	-	-	-
M2X		-			-	3324,~~421~~361.7568	-	3324,~~421~~361.7568	-	-	-
M3X		-			-	~~3,104~~745.7405	-	~~3,104~~745.7405	-	-	-
B1X		-			-	-	-	-	-	-	-
B2X		-			-	-	-	-	-	-	-
Total		-			-	3,~~680~~521,~~526~~439.4737	-	3,~~680~~521,~~526~~439.4737	-	-	-
	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)
A1X				A-30/360		4,799,976,000.00	-	-	-	-	-
A2X				A-30/360		1,599,992,000.00	~~670~~625.~~352670~~698343	2.~~244342~~159842	-	2.~~244342~~159842	~~652~~613.~~864757~~562389
M1X				A-30/360		100,523,000.00	~~351~~328.~~751191~~319923	0.~~527950~~403907	-	0.~~527950~~403907	~~342~~321.~~574835~~951878
M2X				A-30/360		83,769,000.00	~~351~~328.~~751890~~320576	0.~~398975~~290820	-	0.~~398975~~290820	~~342~~321.~~575517~~952518
M3X				A-30/360		33,508,000.00	~~351~~328.~~747691~~316657	0.~~092657~~022235	-	0.~~092657~~022235	~~342~~321.~~571428~~948675
B1X				A-30/360		40,209,000.00	~~232~~183.~~809440~~994056	-	-	-	~~213~~170.~~691938~~727229
B2X				A-30/360		23,455,000.00	6.090332	-	-	-	6.090332
							Page 6 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	A2-2 Components Series 2000-1
	Certificate Payment Report for September 27, 2004 Distribution
	Certificate Payment Report for December 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)
A1X	-		149,714,942.52		-	-	-	149,714,942.52	-	-	-
A2X	-		~~377~~388,~~871~~335,~~941~~990.75		-	-	-	~~377~~388,~~871~~335,~~941~~990.75	-	-	-
M1X	-		9,~~002~~144,~~478~~311.5135		-	-	-	9,~~002~~144,~~478~~311.5135	-	-	-
M2X	-		6,~~285~~375,~~270~~086.6506		-	-	-	6,~~285~~375,~~270~~086.6506	-	-	-
M3X	-		1,~~537~~546,~~160~~127.8532		-	-	-	1,~~537~~546,~~160~~127.8532	-	-	-
B1X	-		92,561.42		-	-	-	92,561.42	-	-	-
B2X	-		18,068.86		-	-	-	18,068.86	-	-	-
Total	-		~~544~~555,~~522~~227,~~424~~088.5628		-	-	-	~~544~~555,~~522~~227,~~424~~088.5628	-	-	-
	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)
A1X	1.~~92210~~58994%	-			-	-	-	-	-	-	-
A2X	4.~~01760~~14227%	1,~~072~~001,~~558~~112,~~909~~343.6307			3,~~590~~455,~~928~~730.8968	-	-	-	3,~~590~~455,~~928~~730.8968	3,~~590~~455,~~928~~730.8968	-
M1X	1.~~80110~~47627%	3533,~~359~~003,~~084~~703.9362			5340,~~071~~601.0996	-	-	-	5340,~~071~~601.0996	5340,~~071~~601.0996	-
M2X	1.~~36110~~06294%	2927,~~465~~503,~~904~~086.1135			3324,~~421~~361.7568	-	-	-	3324,~~421~~361.7568	3324,~~421~~361.7568	-
M3X	0.~~31610~~08127%	11,~~786~~001,~~361~~234.6454			~~3,104~~745.7405	-	-	-	~~3,104~~745.7405	~~3,104~~745.7405	-
B1X		97,~~361~~398,~~034~~217.7701			-	-	-	-	-	-	-
B2X		142,848.74			-	-	-	-	-	-	-
Total		1,~~158~~080,~~674~~161,~~143~~433.8332			3,~~680~~521,~~526~~439.4737	-	-	-	3,~~680~~521,~~526~~439.4737	3,~~680~~521,~~526~~439.4737	-
							Page 7 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Collection Account Report for September 27, 2004 Distribution
	Collection Account Report for December 27, 2004 Distribution
	Collection Account Report
SUMMARY								TOTAL
	Principal Collections							3021,~~747~~337,~~824~~833.9550
	Principal Withdrawals							0.00
	TOTAL PRINCIPAL							3021,~~747~~337,~~824~~833.9550
	Interest Collections							4,~~208~~055,~~679~~545.1283
	Interest Withdrawals							0.00
	Interest Other Accounts							0.00
	Interest Fees							(~~262~~258,~~603~~039.4259)
	TOTAL INTEREST							3,~~946~~797,~~075~~506.7024
	TOTAL AVAILABLE FUNDS							3425,~~693~~135,~~900~~339.6574
PRINCIPAL - COLLECTIONS								TOTAL
	Scheduled Principal							32,~~369~~953,~~402~~837.6427
	Curtailments							1,~~338~~077,~~093~~648.2461
	Prepayments in Full							2617,~~040~~055,~~329~~542.0714
	Repurchases/Substitutions							0.00
	Liquidations							0250,805.0048
	Insurance Principal							0.00
	Other Additional Principal							0.00
	Delinquent Principal							(~~945~~718,~~591~~267.1496)
	Principal Advanced							~~945~~718,~~591~~267.1496
	Total Realized Loss Of Principal							0.00
	TOTAL PRINCIPAL COLLECTED							3021,~~747~~337,~~824~~833.9550
				Page 8 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Collection Account Report for September 27, 2004 Distribution
	Collection Account Report for December 27, 2004 Distribution
	Collection Account Report
PRINCIPAL - WITHDRAWALS								TOTAL
SPACE INTENTIONALLY LEFT BLANK
PRINCIPAL - OTHER ACCOUNTS								TOTAL
SPACE INTENTIONALLY LEFT BLANK
INTEREST - COLLECTIONS								TOTAL
	Scheduled Interest							4,~~315~~141,~~381~~295.7194
	Repurchases/Substitutions							0.00
	Liquidations							0915.0065
	Insurance Interest							0.00
	Other Additional Interest							0.00
	Prepayment Interest Shortfalls							0.00
	Delinquent Interest							(1,~~261~~053,~~283~~550.6259)
	Compensating Interest							0.00
	Relief Act Shortfall Amounts							0.00
	Interest Advanced							1966,~~154,581~~884.0383
	Deferred Interest							0.00
	TOTAL INTEREST							4,~~208~~055,~~679~~545.1283
				Page 9 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Collection Account Report for September 27, 2004 Distribution
	Collection Account Report for December 27, 2004 Distribution
	Collection Account Report
INTEREST - WITHDRAWALS								TOTAL
SPACE INTENTIONALLY LEFT BLANK
INTEREST - OTHER ACCOUNTS								TOTAL
SPACE INTENTIONALLY LEFT BLANK
INTEREST - FEES								TOTAL
	Curent Servicing Fees							~~261~~257,~~621~~122.2282
	Trustee Fee							~~982~~916.2077
	TOTAL INTEREST FEES							~~262~~258,~~603~~039.4259
				Page 10 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Credit Enhancement Report for September 27, 2004 Distribution
	Credit Enhancement Report for December 27, 2004 Distribution
	Credit Enhancement Report
ACCOUNTS								TOTAL
	Beginning Reserve Fund Balance							5,000.00
	Curr Period Required Reserve Fund Deposit							1714,~~622~~592.0514
	Curr Distributions from Reserve Fund							(1714,~~622~~592.0514)
	Reserve Fund Balance							5,000.00
INSURANCE								TOTAL
SPACE INTENTIONALLY LEFT BLANK
STRUCTURAL FEATURES								TOTAL
SPACE INTENTIONALLY LEFT BLANK
				Page 11 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Collateral Report for September 27, 2004 Distribution
	Collateral Report for December 27, 2004 Distribution
	Collateral Report
COLLATERAL								TOTAL
	Loan Count:
	Original							17816
	Prior							3,~~846~~642
	Prefunding							-
	Scheduled Paid Offs							-
	Full Voluntary Prepayments							(8258)
	Repurchases							-
	Liquidations							-(1)
	Current							3,~~764~~583
	Principal Balance:
	Original							6,701,536,869.34
	Prior							1,~~178~~100,~~636~~123,~~164~~453.4392
	Prefunding							-
	Scheduled Principal							(32,~~369~~953,~~402~~837.6427)
	Partial and Full Voluntary Prepayments							(2718,~~378~~133,~~422~~190.3175)
	Repurchases							-
	Liquidations							-(250,805.48)
	Current							1,~~147~~078,~~888~~785,~~339~~620.4842
PREFUNDING								TOTAL
SPACE INTENTIONALLY LEFT BLANK
Current Prin Balance by Groups (in millions of dollars)					Total Current Principal Balance (in millions of dollars)
				Page 12 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Collateral Report for September 27, 2004 Distribution
	Collateral Report for December 27, 2004 Distribution
	Collateral Report
CHARACTERISTICS								TOTAL
	Weighted Average Coupon Original							7.423436%
	Weighted Average Coupon Prior							4.~~410938~~470189%
	Weighted Average Coupon Current							4.~~393602~~518269%
	Weighted Average Months to Maturity Original							332
	Weighted Average Months to Maturity Prior							~~277~~274
	Weighted Average Months to Maturity Current							~~276~~273
	Weighted Avg Remaining Amortization Term Original							-
	Weighted Avg Remaining Amortization Term Prior							~~277~~274
	Weighted Avg Remaining Amortization Term Current							~~276~~273
	Weighted Average Seasoning Original							-
	Weighted Average Seasoning Prior							~~119~~122.09
	Weighted Average Seasoning Current							~~119~~123.9209
Note: Original information refers to deal issue.
WAC by Groups					Total WAC
WARAT by Groups					Total WARAT
Note: Dates correspond to distribution dates.
				Page 13 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Collateral Report for September 27, 2004 Distribution
	Collateral Report for December 27, 2004 Distribution
	Collateral Report
ARM CHARACTERISTICS								TOTAL
	Weighted Average Margin Original							0.000%
	Weighted Average Margin Prior							2.~~431~~425%
	Weighted Average Margin Current							2.~~428~~423%
	Weighted Average Max Rate Original							0.000%
	Weighted Average Max Rate Prior							13.~~399~~441%
	Weighted Average Max Rate Current							13.~~410~~459%
	Weighted Average Min Rate Original							0.000%
	Weighted Average Min Rate Prior							3.~~204~~188%
	Weighted Average Min Rate Current							3.~~203~~186%
	Weighted Average Cap Up Original							0.000%
	Weighted Average Cap Up Prior							0.001%
	Weighted Average Cap Up Current							0.001%
	Weighted Average Cap Down Original							0.000%
	Weighted Average Cap Down Prior							0.001%
	Weighted Average Cap Down Current							0.001%
Note: Original information refers to deal issue.
SERVICING FEES / ADVANCES								TOTAL
	Current Servicing Fees							~~261~~257,~~621~~122.2282
	Delinquent Servicing Fees							~~106~~86,~~702~~665.5976
	TOTAL SERVICING FEES							~~368~~343,~~323~~788.8158
	Total Servicing Fees							~~368~~343,~~323~~788.8158
	Compensating Interest							0.00
	Delinquent Servicing Fees							(~~106~~86,~~702~~665.5976)
	COLLECTED SERVICING FEES							~~261~~257,~~621~~122.2282
	Current PPIS							0.00
	Current Net PPIS							0.00
	Total Advanced Principal For Current Payment Date							~~945~~718,~~591~~267.1496
	Total Advanced Interest For Current Payment Date							1966,~~154,581~~884.0383
	TOTAL ADVANCES FOR CURRENT PERIOD							21,~~100~~685,~~172~~152.1779
ADDITIONAL COLLATERAL INFORMATION								TOTAL
SPACE INTENTIONALLY LEFT BLANK
				Page 14 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Delinquency Report for September 27, 2004 Distribution
	Delinquency Report for December 27, 2004 Distribution
	Delinquency Report - Total
				<1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT		Balance			7,~~088~~213,~~739~~781.4446	~~723~~1,~~248~~087,530.3852	~~715~~1,~~338~~006,636.5369	89,~~527~~307,~~326~~948.3567
		% Balance			0.6267%	0.0610%	0.0609%	0.7486%
		# Loans			2025	32	3	2630
		% # Loans			0.5370%	0.0806%	0.08%	0.6984%
FORECLOSURE		Balance		-350,252.29	-	-	4,~~521~~626,~~724~~651.1643	4,~~521~~976,~~724~~903.1672
		% Balance		0.0003%	0.00%	0.00%	0.3943%	0.3946%
		# Loans		-1	-	-	1011	1012
		% # Loans		0.0003%	0.00%	0.00%	0.2731%	0.2733%
BANKRUPTCY		Balance		2,~~359~~290,~~604~~102.2173	~~253~~250,~~889~~341.8178	~~423,118.26~~-	1,~~491~~629,~~933~~963.9186	4,~~528~~170,~~546~~408.1937
		% Balance		0.21%	0.02%	0.0400%	0.1315%	0.39%
		# Loans		7	1	1-	34	12
		% # Loans		0.1920%	0.03%	0.0300%	0.0811%	0.3233%
REO		Balance		-	-	-	1,~~439~~178,~~184~~167.3502	1,~~439~~178,~~184~~167.3502
		% Balance		0.00%	0.00%	0.00%	0.1311%	0.1311%
		# Loans		-	-	-	32	32
		% # Loans		0.00%	0.00%	0.00%	0.0806%	0.0806%
TOTAL		Balance		2,~~359~~640,~~604~~355.2102	7,~~342~~464,~~629~~123.2524	1,~~146~~087,~~366~~530.6452	8,~~168~~441,~~180~~419.9500	19,~~016~~633,~~781~~427.0578
		% Balance		0.2124%	0.6469%	0.10%	0.7178%	1.6682%
		# Loans		78	2126	42	1920	5156
		% # Loans		0.1922%	0.5673%	0.1106%	0.5056%	1.3556%
Note: <1 Payment = 0-29days, 1 Payment = 30-59days, 2 Payments = 60-89days, 3+ Payments = 90+
								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 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	REO Report for September 27, 2004 Distribution
	REO Report for December 27, 2004 Distribution
	REO Report - Mortgage Loans that Become REO During Current Distribution
SUMMARY				LOAN GROUP
Total Loan Count = 1				Loan Group 1 = ; REO Book Value = Not Available
Total Loan Count = 0				Loan Group 1 = ; REO Book Value = Not Available
Total Original Principal Balance = 268,300.00
Total Original Principal Balance = 000.00
Total Current Balance = 252,194.22
Total Current Balance = 000.00
REO Book Value = Not Available
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
817725666 1		268,300.00	252,194.22	Jun-01-03	4.208%	NC - 79.61%	360	Oct-23-96
SPACE INTENTIONALLY LEFT BLANK
				Page 16 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Prepayment Report for September 27, 2004 Distribution
	Prepayment Report for December 27, 2004 Distribution
	Prepayment Report - Voluntary Prepayments
VOLUNTARY PREPAYMENTS								TOTAL
	Current
	Number of Paid in Full Loans							8258
	Number of Repurchased Loans							-
	Total Number of Loans Prepaid in Full							8258
	Paid in Full Balance							2617,~~040~~055,~~329~~542.0714
	Repurchased Loans Balance							-
	Curtailments Amount							1,~~338~~077,~~093~~648.2461
	Total Prepayment Amount							2718,~~378~~133,~~422~~190.3175
	Cumulative
	Number of Paid in Full Loans							9,~~056~~236
	Number of Repurchased Loans							-
	Total Number of Loans Prepaid in Full							9,~~056~~236
	Paid in Full Balance							5,~~118~~174,~~440~~524,~~365~~552.1559
	Repurchased Loans Balance							-
	Curtailments Amount							~~193~~196,~~013~~507,~~749~~961.3902
	Total Prepayment Amount							5,~~311~~371,~~454~~032,~~114~~513.5461
SPACE INTENTIONALLY LEFT BLANK
Total Prepayments by Groups (in thousands of dollars)					Total Prepayments (in thousands of dollars)
				Page 17 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Prepayment Report for September 27, 2004 Distribution
	Prepayment Report for December 27, 2004 Distribution
	Prepayment Report - Voluntary Prepayments
VOLUNTARY PREPAYMENT RATES								TOTAL
	SMM							21.3365%
	3 Months Avg SMM							21.5277%
	12 Months Avg SMM							2.8638%
	Avg SMM Since Cut-off							32.0497%
	CPR							2418.6413%
	3 Months Avg CPR							2619.3930%
	12 Months Avg CPR							2925.3614%
	Avg CPR Since Cut-off							30.9538%
	PSA							~~410~~302.6209%
	3 Months Avg PSA Approximation							~~439~~321.8859%
	12 Months Avg PSA Approximation							~~489~~418.4197%
	Avg PSA Since Cut-off Approximation							~~515~~506.8334%
CPR by Groups					Total CPR
PSA by Groups					Total PSA
				Page 18 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Prepayment Report for September 27, 2004 Distribution
	Prepayment Report for December 27, 2004 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/(0.002*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 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Realized Loss Report for September 27, 2004 Distribution
	Realized Loss Report for December 27, 2004 Distribution
	Realized Loss Report - Collateral
COLLATERAL REALIZED LOSSES								TOTAL
	Current
	Number of Loans Liquidated							-1
	Collateral Realized Loss/(Gain) Amount							-
	Net Liquidation Proceeds							-250,805.48
	Cumulative
	Number of Loans Liquidated							-1
	Collateral Realized Loss/(Gain) Amount							142,848.74
	Net Liquidation Proceeds							~~(142~~107,~~848~~956.74)
	Note: Collateral Realized Loss Amount may include adjustments to loans liquidated in prior periods.
SPACE INTENTIONALLY LEFT BLANK
							3 Months Moving Average
Collateral Loss Severity Approximation by Groups					Collateral Loss Severity Approximation
				Page 20 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Realized Loss Report for September 27, 2004 Distribution
	Realized Loss Report for December 27, 2004 Distribution
	Realized Loss Report - Collateral
DEFAULT SPEEDS								TOTAL
	MDR							0.0002%
	3 Months Avg MDR							0.0001%
	12 Months Avg MDR							0.00%
	Avg MDR Since Cut-off							0.00%
	CDR							0.0027%
	3 Months Avg CDR							0.0009%
	12 Months Avg CDR							0.0002%
	Avg CDR Since Cut-off							0.00%
	SDA							09.0011%
	3 Months Avg SDA Approximation							03.0004%
	12 Months Avg SDA Approximation							0.0041%
	Avg SDA Since Cut-off Approximation							0.0002%
	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 21 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Realized Loss Report for September 27, 2004 Distribution
	Realized Loss Report for December 27, 2004 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 22 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Realized Loss Detail Report for September 27, 2004 Distribution
	Realized Loss Detail Report for December 27, 2004 Distribution
	Realized Loss Detail Report - Loans Liquidated During Current Distribution
SUMMARY							LOAN GROUP
Total Loan Count Current Losses = 0
Total Loan Count Current Losses = 1
Total Loan Count Revisions = 0						Loan Group 1 =
Total Prior Principal Balance = 0.00
Total Prior Principal Balance = 250,805.48
Total Current Realized Loss Amount = 0.00
Total Revisions Amount = 0.00
Total Realized Loss Amount = 0.00
Total Net Liquidation Proceeds = 0.00
Total Net Liquidation Proceeds = 250,805.48
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 23 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Additional Certificate Report for September 27, 2004 Distribution
	Additional Certificate Report for December 27, 2004 Distribution
	Additional Certificate Report
	CLASS			Carryforward Interest		Basis Risk Shortfall Reimbursed	Basis Risk Shortfall	Unpaid Basis Risk Shortfall
	A1			0.00		0.00	0.00	0.00
	A2			0.00		0.00	0.00	0.00
	M1			0.00		0.00	0.00	0.00
	M2			0.00		0.00	0.00	0.00
	M3			0.00		0.00	0.00	0.00
	B1			0.00		1613,~~841~~833.2701	1613,~~841~~833.2701	0.00
	B2			0.00		~~780~~759.7813	~~780~~759.7813	0.00
				Page 24 of 24				© COPYRIGHT 2004 Deutsche Bank

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