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): ~~March~~April 2526, 2004 Greenwich Capital Acceptance, Inc., (as depositor, and Deutsche Bank National Trust Company, as Trustee). WASHINGTON MUTUAL MORT PS THR CERTS SER 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 Item 5. Other Events Attached hereto is a copy of the Underlying Distribution Statement to the Certificateholders which was derived from the monthly information submitted by the Master Servicer of the Underlying Security 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 ~~March~~April 2526, 2004. 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 its individual capacity, but solely as a duly authorized agent of the Registrant pursuant to the Trust Agreement, dated as of October 1,2003. Date: Apr 0126, 2004 By: /s/ Katherine M. Wannenmacher Katherine M. Wannenmacher Vice President EXHIBIT INDEX DOCUMENT Monthly Remittance Statement to the Certificateholders dated as of ~~March~~April 2526, 2004.

	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	March 25, 2004 Distribution
	April 26, 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
				Direct Phone Number: (714)247-6315
				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:		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: March 25, 2004
								Distribution Date: April 26, 2004
	Underwriter(s):		Lehman Brothers Underwriter					Record Date: ~~March~~April 2423, 2004
								February 27, 2004
								March 31, 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 March 25, 2004 Distribution
	Certificate Payment Report for April 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)
LT-A1		4,799,976,000.00			-	-	-	-	-	-	-
LT-A2		1,599,992,000.00			1,~~274~~247,~~341~~753,~~114~~150.3999	4,~~409~~295,~~043~~844.9983	2635,~~587~~751,~~963~~627.4000	3040,~~997~~047,~~007~~471.3983	-	-	1,~~247~~212,~~753~~001,~~150~~523.99
LT-M1		100,523,000.00			4241,~~011~~134,~~245~~719.5326	~~145~~141,~~353~~621.1026	~~876~~1,~~526~~178,625.2707	1,~~021~~320,~~879~~246.3733	-	-	4139,~~134~~956,~~719~~094.2620
LT-M2		83,769,000.00			3534,~~009~~278,~~371~~932.2772	~~121~~118,~~127~~017.5872	~~730~~982,~~438~~187.56	~~851~~1,~~566~~100,205.1428	-	-	3433,~~278~~296,~~932~~745.7216
LT-M3		33,508,000.00			1413,~~003~~711,~~748~~573.5109	4847,~~451~~207.0309	~~292~~392,~~175~~875.4202	~~340~~440,~~626~~082.4511	-	-	13,~~711~~318,~~573~~698.0907
LT-B1		40,209,000.00			14,~~904~~174,~~501~~063.9338	5148,~~567~~799.5238	~~730~~982,~~438~~187.56	~~782~~1,~~006~~030,986.0894	-	-	1413,~~174~~191,~~063~~875.3882
LT-B2		23,455,000.00			142,848.74	~~494~~491.2481	-	~~494~~491.2481	-	-	142,848.74
LT-B3		20,104,869.34			19,962,020.60	6968,~~065~~726.8353	-	6968,~~065~~726.8353	-	-	19,962,020.60
LT-R		-			-	-	-	-	-	-	-
Total		6,701,536,869.34			1,~~400~~371,~~374~~157,~~850~~308.9878	4,~~845~~720,~~103~~708.2962	2939,~~217~~287,~~542~~502.20	3444,~~062~~008,~~645~~210.4982	-	-	1,~~371~~331,~~157~~869,~~308~~806.7858
	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	~~796~~779.~~467179~~849619	2.~~755666~~684916	1622.~~617560~~344879	1925.~~373226~~029795	~~779~~757.~~849619~~504740
LT-M1				F-30/360		100,523,000.00	~~417~~409.~~926699~~207040	1.~~445969~~408844	811.~~719659~~724929	1013.~~165627~~133774	~~409~~397.~~207040~~482111
LT-M2				F-30/360		83,769,000.00	~~417~~409.~~927530~~207854	1.~~445971~~408847	811.~~719676~~724953	1013.~~165648~~133800	~~409~~397.~~207854~~482901
LT-M3				F-30/360		33,508,000.00	~~417~~409.~~922541~~202969	1.~~445954~~408830	811.~~719572~~724813	1013.~~165526~~133643	~~409~~397.~~202969~~478156
LT-B1				F-30/360		40,209,000.00	~~370~~352.~~675767~~509721	1.~~282487~~213643	1824.~~166046~~427057	1925.~~448533~~640701	~~352~~328.~~509721~~082664
LT-B2				F-30/360		23,455,000.00	6.090332	0.~~021072~~020968	-	0.~~021072~~020968	6.090332
LT-B3				F-30/360		20,104,869.34	992.894819	3.~~435279~~418402	-	3.~~435279~~418402	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 March 25, 2004 Distribution
	Certificate Payment Report for April 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)
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		~~354~~358,~~247~~543,~~268~~113.4023		-	~~372~~408,~~395~~146,~~182~~809.49	~~372~~408,~~395~~146,~~182~~809.49	~~726~~766,~~642~~689,~~450~~922.8972	-	20,156,333.48	1,~~247~~212,~~753~~001,~~150~~523.99
LT-M1	100,523,000.00		21,~~780~~922,~~427~~048.7096		-	5960,~~388~~566,~~280~~905.7480	5960,~~388~~566,~~280~~905.7480	8182,~~168~~488,~~708~~954.4476	-	-	4139,~~134~~956,~~719~~094.2620
LT-M2	83,769,000.00		18,~~050~~168,~~006~~024.7951		-	4950,~~490~~472,~~067~~254.2884	4950,~~490~~472,~~067~~254.2884	6768,~~540~~640,~~074~~279.0735	-	-	3433,~~278~~296,~~932~~745.7216
LT-M3	33,508,000.00		7,~~220~~267,~~080~~287.6877		-	1920,~~796~~189,~~426~~301.9193	1920,~~796~~189,~~426~~301.9193	27,~~016~~456,~~507~~589.5970	-	-	13,~~711~~318,~~573~~698.0907
LT-B1	40,209,000.00		8,~~649~~698,~~413~~212.3472		-	2627,~~034~~017,~~936~~124.6218	2627,~~034~~017,~~936~~124.6218	3435,~~684~~715,~~349~~336.9690	-	-	1413,~~174~~191,~~063~~875.3882
LT-B2	23,455,000.00		4,~~684~~685,~~966~~458.9374		-	23,312,151.26	23,312,151.26	27,997,~~118~~610.1900	-	-	142,848.74
LT-B3	20,104,869.34		4,~~714~~783,~~603~~329.3386		-	-	-	4,~~714~~783,~~603~~329.3386	142,848.74	-	19,962,020.60
LT-R	-		-		-	-	-	-	-	-	-
Total	6,701,536,869.34		~~955~~959,~~207~~928,~~844~~553.8749		4,620,338,847.23	~~730~~769,~~054~~341,~~198~~700.0727	5,~~350~~389,~~393~~680,~~045~~547.3050	6,~~305~~349,~~600~~609,~~890~~100.1799	142,848.74	20,156,333.48	1,~~371~~331,~~157~~869,~~308~~806.7858
	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.~~15183~~13144%	-			-	-	-	-	-	-	-
LT-A2	4.~~15183~~13144%	1,~~274~~247,~~341~~753,~~114~~150.3999			4,~~409~~295,~~043~~844.9983	-	-	-	4,~~409~~295,~~043~~844.9983	4,~~409~~295,~~043~~844.9983	-
LT-M1	4.~~15183~~13144%	4241,~~011~~134,~~245~~719.5326			~~145~~141,~~353~~621.1026	-	-	-	~~145~~141,~~353~~621.1026	~~145~~141,~~353~~621.1026	-
LT-M2	4.~~15183~~13144%	3534,~~009~~278,~~371~~932.2772			~~121~~118,~~127~~017.5872	-	-	-	~~121~~118,~~127~~017.5872	~~121~~118,~~127~~017.5872	-
LT-M3	4.~~15183~~13144%	1413,~~003~~711,~~748~~573.5109			4847,~~451~~207.0309	-	-	-	4847,~~451~~207.0309	4847,~~451~~207.0309	-
LT-B1	4.~~15183~~13144%	14,~~904~~174,~~501~~063.9338			5148,~~567~~799.5238	-	-	-	5148,~~567~~799.5238	5148,~~567~~799.5238	-
LT-B2	4.~~15183~~13144%	142,848.74			~~494~~491.2481	-	-	-	~~494~~491.2481	~~494~~491.2481	-
LT-B3	4.~~15183~~13144%	19,962,020.60			6968,~~065~~726.8353	-	-	-	6968,~~065~~726.8353	6968,~~065~~726.8353	-
LT-R		-			-	-	-	-	-	-	-
Total		1,~~400~~371,~~374~~157,~~850~~308.9878			4,~~845~~720,~~103~~708.2962	-	-	-	4,~~845~~720,~~103~~708.2962	4,~~845~~720,~~103~~708.2962	-
							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 March 25, 2004 Distribution
	Certificate Payment Report for April 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)
A1	STEP, FLT	4,799,976,000.00			-	-	-	-	-	-	-
A2	CSTR	1,599,992,000.00			1,~~274~~247,~~341~~753,~~114~~150.3999	4,~~578~~440,~~114~~014.4673	2635,~~587~~751,~~963~~627.4000	3140,~~166~~191,~~077~~641.8673	-	-	1,~~247~~212,~~753~~001,~~150~~523.99
M1	MEZ, STEP	100,523,000.00			4241,~~011~~134,~~245~~719.5326	5054,~~425~~480.1665	~~876~~1,~~526~~178,625.2707	~~926~~1,~~951~~233,105.4372	-	-	4139,~~134~~956,~~719~~094.2620
M2	MEZ, STEP	83,769,000.00			3534,~~009~~278,~~371~~932.2772	5357,~~301~~588.7761	~~730~~982,~~438~~187.56	~~783~~1,~~740~~039,776.3317	-	-	3433,~~278~~296,~~932~~745.7216
M3	MEZ, STEP	33,508,000.00			1413,~~003~~711,~~748~~573.5109	3234,~~037~~614.4610	~~292~~392,~~175~~875.4202	~~324~~427,~~212~~489.8812	-	-	13,~~711~~318,~~573~~698.0907
B1	SUB, STEP	40,209,000.00			14,~~904~~174,~~501~~063.9338	6164,~~112~~129.6076	~~730~~982,~~438~~187.56	~~791~~1,~~551~~046,317.1632	-	-	1413,~~174~~191,~~063~~875.3882
B2	SUB, STEP	23,455,000.00			142,848.74	1,~~046~~154.0122	-	1,~~046~~154.0122	-	-	142,848.74
B3	SUB, CSTR	20,104,869.34			19,962,020.60	6968,~~065~~726.8352	-	6968,~~065~~726.8352	-	-	19,962,020.60
UT-R	R	-			-	-	-	-	-	-	-
Total		6,701,536,869.34			1,~~400~~371,~~374~~157,~~850~~308.9878	4,~~845~~720,~~103~~708.2959	2939,~~217~~287,~~542~~502.20	3444,~~062~~008,~~645~~210.4979	-	-	1,~~371~~331,~~157~~869,~~308~~806.7858
	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	0203/25/04	0304/2425/04		A-Act/360	863572L68	4,799,976,000.00	-	-	-	-	-
A2				F-30/360	863572L76	1,599,992,000.00	~~796~~779.~~467179~~849619	2.~~861336~~775023	1622.~~617560~~344879	1925.~~478896~~119902	~~779~~757.~~849619~~504740
M1	0203/25/04	0304/2425/04		A-Act/360	863572L84	100,523,000.00	~~417~~409.~~926699~~207040	0.~~501628~~541972	811.~~719659~~724929	912.~~221287~~266901	~~409~~397.~~207040~~482111
M2	0203/25/04	0304/2425/04		A-Act/360	863572L92	83,769,000.00	~~417~~409.~~927530~~207854	0.~~636295~~687469	811.~~719676~~724953	912.~~355971~~412422	~~409~~397.~~207854~~482901
M3	0203/25/04	0304/2425/04		A-Act/360	863572M26	33,508,000.00	~~417~~409.~~922541~~202969	01.~~956114~~033010	811.~~719572~~724813	912.~~675686~~757823	~~409~~397.~~202969~~478156
B1	0203/25/04	0304/2425/04		A-Act/360	863572M34	40,209,000.00	~~370~~352.~~675767~~509721	1.~~519874~~594911	1824.~~166046~~427057	1926.~~685920~~021968	~~352~~328.~~509721~~082664
B2	0203/25/04	0304/2425/04		A-Act/360	863572M42	23,455,000.00	6.090332	0.~~044596~~049210	-	0.~~044596~~049210	6.090332
B3				F-30/360	863572M59	20,104,869.34	992.894819	3.~~435279~~418402	-	3.~~435279~~418402	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 March 25, 2004 Distribution
	Certificate Payment Report for April 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)
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		~~513~~517,~~042~~482,~~466~~481.5730		~~343~~376,~~884~~080,~~837~~741.1061	2832,~~510~~066,~~345~~067.3988	~~372~~408,~~395~~146,~~182~~809.49	~~885~~925,~~437~~629,~~649~~290.0679	-	20,156,333.48	1,~~247~~212,~~753~~001,~~150~~523.99
M1	100,523,000.00		13,~~261~~315,~~129~~610.9156		5556,~~605~~667,~~681~~084.3276	3,~~782~~899,~~599~~821.4204	5960,~~388~~566,~~280~~905.7480	7273,~~649~~882,~~410~~516.6536	-	-	4139,~~134~~956,~~719~~094.2620
M2	83,769,000.00		12,~~201~~259,~~892~~481.5213		4546,~~938~~822,~~163~~666.8471	3,~~551~~649,~~903~~588.4413	4950,~~490~~472,~~067~~254.2884	6162,~~691~~731,~~959~~735.8097	-	-	3433,~~278~~296,~~932~~745.7216
M3	33,508,000.00		6,~~012~~047,~~458~~072.5565		18,~~375~~729,~~636~~437.1530	1,~~420~~459,~~790~~864.7664	1920,~~796~~189,~~426~~301.9193	2526,~~808~~236,~~885~~374.4658	-	-	13,~~711~~318,~~573~~698.0907
B1	40,209,000.00		10,~~413~~477,~~354~~484.6036		24,~~103~~988,~~961~~464.3320	12,~~930~~028,~~975~~659.2997	2627,~~034~~017,~~936~~124.6218	3637,~~448~~494,~~291~~608.2254	-	-	1413,~~174~~191,~~063~~875.3882
B2	23,455,000.00		8,~~630~~631,~~622~~776.2345		21,701,370.05	1,610,781.21	23,312,151.26	31,~~942~~943,~~773~~927.4971	-	-	142,848.74
B3	20,104,869.34		4,~~714~~783,~~603~~329.3183		-	-	-	4,~~714~~783,~~603~~329.3183	142,848.74	-	19,962,020.60
UT-R	-		-		-	-	-	-	-	-	-
Total	6,701,536,869.34		~~955~~959,~~207~~928,~~844~~553.8746		5,~~129~~165,~~948~~328,~~497~~611.0186	~~220~~224,~~444~~351,~~548~~935.2964	5,~~350~~389,~~393~~680,~~045~~547.3050	6,~~305~~349,~~600~~609,~~890~~100.1796	142,848.74	20,156,333.48	1,~~371~~331,~~157~~869,~~308~~806.7858
	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	1.38000%	-			-	-	-	-	-	-	-
A2	4.~~31104~~27009%	1,~~274~~247,~~341~~753,~~114~~150.3999			4,~~578~~440,~~114~~014.4673	-	-	-	4,~~578~~440,~~114~~014.4673	4,~~578~~440,~~114~~014.4673	-
M1	1.49000%	4241,~~011~~134,~~245~~719.5326			5054,~~425~~480.1665	-	-	-	5054,~~425~~480.1665	5054,~~425~~480.1665	-
M2	1.89000%	3534,~~009~~278,~~371~~932.2772			5357,~~301~~588.7761	-	-	-	5357,~~301~~588.7761	5357,~~301~~588.7761	-
M3	2.84000%	1413,~~003~~711,~~748~~573.5109			3234,~~037~~614.4610	-	-	-	3234,~~037~~614.4610	3234,~~037~~614.4610	-
B1	5.09000%	14,~~904~~174,~~501~~063.9338			6164,~~112~~129.6076	-	-	-	6164,~~112~~129.6076	6164,~~112~~129.6076	-
B2	9.09000%	142,848.74			1,~~046~~154.0122	-	-	-	1,~~046~~154.0122	1,~~046~~154.0122	-
B3	4.~~15183~~13144%	19,962,020.60			6968,~~065~~726.8353	-	-	-	6968,~~065~~726.8353	6968,~~065~~726.8352	-
UT-R		-			-	-	-	-	-	-	-
Total		1,~~400~~371,~~374~~157,~~850~~308.9878			4,~~845~~720,~~103~~708.2960	-	-	-	4,~~845~~720,~~103~~708.2960	4,~~845~~720,~~103~~708.2959	-
							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 March 25, 2004 Distribution
	Certificate Payment Report for April 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)
A1X		-			-	-	-	-	-	-	-
A2X		-			-	4,~~409~~295,~~043~~844.9983	-	4,~~409~~295,~~043~~844.9983	-	-	-
M1X		-			-	9487,~~927~~140.9361	-	9487,~~927~~140.9361	-	-	-
M2X		-			-	6760,~~825~~429.8111	-	6760,~~825~~429.8111	-	-	-
M3X		-			-	1612,~~413~~592.5798	-	1612,~~413~~592.5798	-	-	-
B1X		-			-	-	-	-	-	-	-
B2X		-			-	-	-	-	-	-	-
Total		-			-	4,~~588~~456,~~211~~007.3053	-	4,~~588~~456,~~211~~007.3053	-	-	-
	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	~~796~~779.~~467179~~849619	2.~~755666~~684916	-	2.~~755666~~684916	~~779~~757.~~849619~~504740
M1X				A-30/360		100,523,000.00	~~417~~409.~~926699~~207040	0.~~944340~~866872	-	0.~~944340~~866872	~~409~~397.~~207040~~482111
M2X				A-30/360		83,769,000.00	~~417~~409.~~927530~~207854	0.~~809677~~721378	-	0.~~809677~~721378	~~409~~397.~~207854~~482901
M3X				A-30/360		33,508,000.00	~~417~~409.~~922541~~202969	0.~~489840~~375820	-	0.~~489840~~375820	~~409~~397.~~202969~~478156
B1X				A-30/360		40,209,000.00	~~370~~352.~~675767~~509721	-	-	-	~~352~~328.~~509721~~082664
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 March 25, 2004 Distribution
	Certificate Payment Report for April 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)
A1X	-		149,714,942.52		-	-	-	149,714,942.52	-	-	-
A2X	-		~~354~~358,~~247~~543,~~268~~113.4326		-	-	-	~~354~~358,~~247~~543,~~268~~113.4326	-	-	-
M1X	-		8,~~552~~639,~~381~~522.9960		-	-	-	8,~~552~~639,~~381~~522.9960	-	-	-
M2X	-		56,~~975~~036,~~831~~260.3243		-	-	-	56,~~975~~036,~~831~~260.3243	-	-	-
M3X	-		1,~~475~~488,~~744~~337.1816		-	-	-	1,~~475~~488,~~744~~337.1816	-	-	-
B1X	-		92,561.42		-	-	-	92,561.42	-	-	-
B2X	-		18,068.86		-	-	-	18,068.86	-	-	-
Total	-		~~520~~524,~~076~~532,~~798~~806.7225		-	-	-	~~520~~524,~~076~~532,~~798~~806.7225	-	-	-
	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	2.~~81783~~65944%	-			-	-	-	-	-	-	-
A2X	4.~~15183~~13144%	1,~~274~~247,~~341~~753,~~114~~150.3999			4,~~409~~295,~~043~~844.9983	-	-	-	4,~~409~~295,~~043~~844.9983	4,~~409~~295,~~043~~844.9983	-
M1X	2.~~71150~~54210%	4241,~~011~~134,~~245~~719.5326			9487,~~927~~140.9361	-	-	-	9487,~~927~~140.9361	9487,~~927~~140.9361	-
M2X	2.~~32483~~11544%	3534,~~009~~278,~~371~~932.2772			6760,~~825~~429.8111	-	-	-	6760,~~825~~429.8111	6760,~~825~~429.8111	-
M3X	1.~~40650~~10210%	1413,~~003~~711,~~748~~573.5109			1612,~~413~~592.5798	-	-	-	1612,~~413~~592.5798	1612,~~413~~592.5798	-
B1X		14,~~904~~174,~~501~~063.9338			-	-	-	-	-	-	-
B2X		142,848.74			-	-	-	-	-	-	-
Total		1,~~380~~351,~~412~~195,~~830~~288.3818			4,~~588~~456,~~211~~007.3053	-	-	-	4,~~588~~456,~~211~~007.3053	4,~~588~~456,~~211~~007.3053	-
							Page 7 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Collection Account Report for March 25, 2004 Distribution
	Collection Account Report for April 26, 2004 Distribution
	Collection Account Report
SUMMARY								TOTAL
	Principal Collections							2939,~~217~~287,~~542~~502.20
	Principal Withdrawals							0.00
	TOTAL PRINCIPAL							2939,~~217~~287,~~542~~502.20
	Interest Collections							5,~~186~~042,~~936~~277.7377
	Interest Withdrawals							0.00
	Interest Other Accounts							0.00
	Interest Fees							(~~341~~321,~~833~~569.4418)
	TOTAL INTEREST							4,~~845~~720,~~103~~708.2959
	TOTAL AVAILABLE FUNDS							3444,~~062~~008,~~645~~210.4979
PRINCIPAL - COLLECTIONS								TOTAL
	Scheduled Principal							43,~~002~~907,~~346~~387.5635
	Curtailments							21,~~217~~789,~~355~~542.5306
	Prepayments in Full							2233,~~997~~590,~~840~~572.1179
	Repurchases/Substitutions							0.00
	Liquidations							0.00
	Insurance Principal							0.00
	Other Additional Principal							0.00
	Delinquent Principal							(~~848~~964,~~178~~595.5584)
	Principal Advanced							~~848~~964,~~178~~595.5584
	Total Realized Loss Of Principal							0.00
	TOTAL PRINCIPAL COLLECTED							2939,~~217~~287,~~542~~502.20
				Page 8 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Collection Account Report for March 25, 2004 Distribution
	Collection Account Report for April 26, 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							5,~~283~~150,~~887~~337.4189
	Repurchases/Substitutions							0.00
	Liquidations							0.00
	Insurance Interest							0.00
	Other Additional Interest							0.00
	Prepayment Interest Shortfalls							0.00
	Delinquent Interest							(1,~~176~~298,~~835~~058.3639)
	Compensating Interest							0.00
	Relief Act Shortfall Amounts							0.00
	Interest Advanced							1,~~079~~189,~~884~~998.6827
	Deferred Interest							0.00
	TOTAL INTEREST							5,~~186~~042,~~936~~277.7377
				Page 9 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Collection Account Report for March 25, 2004 Distribution
	Collection Account Report for April 26, 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							~~340~~320,~~666~~426.4655
	Trustee Fee							1,~~166~~142.9863
	TOTAL INTEREST FEES							~~341~~321,~~833~~569.4418
				Page 10 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Credit Enhancement Report for March 25, 2004 Distribution
	Credit Enhancement Report for April 26, 2004 Distribution
	Credit Enhancement Report
ACCOUNTS								TOTAL
	Beginning Reserve Fund Balance							5,000.00
	Curr Period Required Reserve Fund Deposit							1015,~~096~~992.8579
	Curr Distributions from Reserve Fund							(1015,~~096~~992.8579)
	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 March 25, 2004 Distribution
	Collateral Report for April 26, 2004 Distribution
	Collateral Report
COLLATERAL								TOTAL
	Loan Count:
	Original							17816
	Prior							4,~~429~~354
	Prefunding							-
	Scheduled Paid Offs							-
	Full Voluntary Prepayments							(75106)
	Repurchases							-
	Liquidations							-
	Current							4,~~354~~248
	Principal Balance:
	Original							6,701,536,869.34
	Prior							1,~~400~~371,~~374~~157,~~850~~308.9878
	Prefunding							-
	Scheduled Principal							(43,~~002~~907,~~346~~387.5635)
	Partial and Full Voluntary Prepayments							(2535,~~215~~380,~~195~~114.6485)
	Repurchases							-
	Liquidations							-
	Current							1,~~371~~331,~~157~~869,~~308~~806.7858
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 March 25, 2004 Distribution
	Collateral Report for April 26, 2004 Distribution
	Collateral Report
CHARACTERISTICS								TOTAL
	Weighted Average Coupon Original							7.423436%
	Weighted Average Coupon Prior							4.~~526136~~527834%
	Weighted Average Coupon Current							4.~~527834~~507437%
	Weighted Average Months to Maturity Original							332
	Weighted Average Months to Maturity Prior							~~284~~283
	Weighted Average Months to Maturity Current							~~283~~281
	Weighted Avg Remaining Amortization Term Original							-
	Weighted Avg Remaining Amortization Term Prior							~~283~~282
	Weighted Avg Remaining Amortization Term Current							~~282~~281
	Weighted Average Seasoning Original							-
	Weighted Average Seasoning Prior							~~112~~113.4148
	Weighted Average Seasoning Current							~~113~~114.4854
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 March 25, 2004 Distribution
	Collateral Report for April 26, 2004 Distribution
	Collateral Report
ARM CHARACTERISTICS								TOTAL
	Weighted Average Margin Original							0.000%
	Weighted Average Margin Prior							2.~~439~~438%
	Weighted Average Margin Current							2.~~438~~437%
	Weighted Average Max Rate Original							0.000%
	Weighted Average Max Rate Prior							13.~~390~~387%
	Weighted Average Max Rate Current							13.~~387~~377%
	Weighted Average Min Rate Original							0.000%
	Weighted Average Min Rate Prior							3.~~234~~231%
	Weighted Average Min Rate Current							3.~~231~~228%
	Weighted Average Cap Up Original							0.000%
	Weighted Average Cap Up Prior							0.~~000~~001%
	Weighted Average Cap Up Current							0.001%
	Weighted Average Cap Down Original							0.000%
	Weighted Average Cap Down Prior							0.~~000~~001%
	Weighted Average Cap Down Current							0.001%
Note: Original information refers to deal issue.
SERVICING FEES / ADVANCES								TOTAL
	Current Servicing Fees							~~340~~320,~~666~~426.4655
	Delinquent Servicing Fees							96108,~~950~~060.6811
	TOTAL SERVICING FEES							~~437~~428,~~617~~486.1466
	Total Servicing Fees							~~437~~428,~~617~~486.1466
	Compensating Interest							0.00
	Delinquent Servicing Fees							(96108,~~950~~060.6811)
	COLLECTED SERVICING FEES							~~340~~320,~~666~~426.4655
	Current PPIS							0.00
	Current Net PPIS							0.00
	Total Advanced Principal For Current Payment Date							~~848~~964,~~178~~595.5584
	Total Advanced Interest For Current Payment Date							1,~~079~~189,~~884~~998.6827
	TOTAL ADVANCES FOR CURRENT PERIOD							12,~~928~~154,~~063~~594.2311
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 March 25, 2004 Distribution
	Delinquency Report for April 26, 2004 Distribution
	Delinquency Report - Total
				<1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT		Balance			79,~~871~~603,~~663~~156.0612	12,~~128~~326,~~922~~432.4537	2,~~019~~199,~~821~~094.6599	1114,~~020~~128,~~407~~683.1648
		% Balance			0.5772%	0.0817%	0.1517%	01.8006%
		# Loans			2122	47	67	3136
		% # Loans			0.4852%	0.0916%	0.1416%	0.7185%
FORECLOSURE		Balance		-	-	-	2,~~028~~288,~~579~~596.5762	2,~~028~~288,~~579~~596.5762
		% Balance		0.00%	0.00%	0.00%	0.1517%	0.1517%
		# Loans		-	-	-	45	45
		% # Loans		0.00%	0.00%	0.00%	0.0912%	0.0912%
BANKRUPTCY		Balance		4,~~349~~864,~~237~~424.4662	~~543~~321,~~614~~511.2510	~~445~~444,~~487~~766.6278	~~985~~727,~~479~~573.01	6,~~323~~358,~~818~~275.3451
		% Balance		0.3237%	0.0402%	0.03%	0.0705%	0.4648%
		# Loans		1113	21	1	32	17
		% # Loans		0.2531%	0.0502%	0.02%	0.0705%	0.3940%
REO		Balance		-	-	-	1,~~542~~538,~~458~~867.1904	1,~~542~~538,~~458~~867.1904
		% Balance		0.00%	0.00%	0.00%	0.1112%	0.1112%
		# Loans		-	-	-	3	3
		% # Loans		0.00%	0.00%	0.00%	0.07%	0.07%
TOTAL		Balance		4,~~349~~864,~~237~~424.4662	89,~~415~~924,~~277~~667.3122	12,~~574~~771,~~410~~199.0715	6,~~576~~754,~~338~~131.4266	2024,~~915~~314,~~263~~422.2665
		% Balance		0.3237%	0.6175%	0.1121%	0.4851%	1.5383%
		# Loans		1113	23	58	1617	5561
		% # Loans		0.2531%	0.5354%	0.1119%	0.3740%	1.2644%
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 March 25, 2004 Distribution
	REO Report for April 26, 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 = 353,700.00
Total Original Principal Balance = 000.00
Total Current Balance = 338,688.38
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
7018739156 1		353,700.00	338,688.38	Dec-10-02	4.471%	FL - 74.46%	360	Dec-03-96
SPACE INTENTIONALLY LEFT BLANK
				Page 16 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Prepayment Report for March 25, 2004 Distribution
	Prepayment Report for April 26, 2004 Distribution
	Prepayment Report - Voluntary Prepayments
VOLUNTARY PREPAYMENTS								TOTAL
	Current
	Number of Paid in Full Loans							75106
	Number of Repurchased Loans							-
	Total Number of Loans Prepaid in Full							75106
	Paid in Full Balance							2233,~~997~~590,~~840~~572.1179
	Repurchased Loans Balance							-
	Curtailments Amount							21,~~217~~789,~~355~~542.5306
	Total Prepayment Amount							2535,~~215~~380,~~195~~114.6485
	Cumulative
	Number of Paid in Full Loans							8,~~466~~572
	Number of Repurchased Loans							-
	Total Number of Loans Prepaid in Full							8,~~466~~572
	Paid in Full Balance							4,~~926~~959,~~102~~692,~~140~~713.9473
	Repurchased Loans Balance							-
	Curtailments Amount							~~183~~185,~~832~~622,~~871~~413.3339
	Total Prepayment Amount							5,~~109~~145,~~935~~315,~~012~~127.2712
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 March 25, 2004 Distribution
	Prepayment Report for April 26, 2004 Distribution
	Prepayment Report - Voluntary Prepayments
VOLUNTARY PREPAYMENT RATES								TOTAL
	SMM							12.8159%
	3 Months Avg SMM							2.4822%
	12 Months Avg SMM							3.6154%
	Avg SMM Since Cut-off							3.0908%
	CPR							1926.6499%
	3 Months Avg CPR							2623.0261%
	12 Months Avg CPR							35.6415%
	Avg CPR Since Cut-off							31.3729%
	PSA							~~327~~449.3688%
	3 Months Avg PSA Approximation							~~433~~393.6255%
	12 Months Avg PSA Approximation							~~593~~585.9779%
	Avg PSA Since Cut-off Approximation							~~522~~521.8743%
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 March 25, 2004 Distribution
	Prepayment Report for April 26, 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/(0.02*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 19 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Realized Loss Report for March 25, 2004 Distribution
	Realized Loss Report for April 26, 2004 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							142,848.74
	Net Liquidation Proceeds							(142,848.74)
	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 March 25, 2004 Distribution
	Realized Loss Report for April 26, 2004 Distribution
	Realized Loss Report - Collateral
DEFAULT SPEEDS								TOTAL
	MDR							0.00%
	3 Months Avg MDR							0.00%
	12 Months Avg MDR							0.00%
	Avg MDR Since Cut-off							0.00%
	CDR							0.00%
	3 Months Avg CDR							0.00%
	12 Months Avg CDR							0.00%
	Avg CDR Since Cut-off							0.00%
	SDA							0.00%
	3 Months Avg SDA Approximation							0.00%
	12 Months Avg SDA Approximation							0.00%
	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 21 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Realized Loss Report for March 25, 2004 Distribution
	Realized Loss Report for April 26, 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 March 25, 2004 Distribution
	Realized Loss Detail Report for April 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 =
Total Prior Principal Balance = 0.00
Total Current Realized Loss Amount = 0.00
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 23 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Additional Certificate Report for March 25, 2004 Distribution
	Additional Certificate Report for April 26, 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		915,~~545~~330.0838	915,~~545~~330.0838	0.00
	B2			0.00		~~551~~662.7741	~~551~~662.7741	0.00
				Page 24 of 24				© COPYRIGHT 2004 Deutsche Bank

Filing Compare · WASHINGTON MUTUAL MORT PS THR CERTS SER 2003-R1