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): ~~November~~December 2526, 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 March 1, 2003, providing for the issuance of IndyMac MBS, Inc. Residential Asset-Securitization Trust Series 2003-A4 Mortgage Pass-Through Certificates Series 2003-D. INDYMAC MBS INC RESIDENTIAL ASSET SECUR TRUST 2003-A4 (Exact name of Registrant as specified in its Charter) DELAWARE (State or Other Jurisdiction of Incorporation) 333-102888-03 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 ~~November~~December 2526, 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 March 1, 2003. Date: ~~Nov~~Jan 2602, ~~2003~~2004 By: /s/ Katherine M. Wannenmacher Katherine M. Wannenmacher Vice President EXHIBIT INDEX DOCUMENT Monthly Remittance Statement to the Certificateholders dated as of ~~November~~December 2526, 2003.

	IndyMac Residential Asset Securitization Trust 2003-A4
	Mortgage Pass-Through Certificates
	November 25, 2003 Distribution
	December 26, 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
				Total Number of Pages				21
			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: March 1, 2003
	Certificate Insurer(s):							Closing Date: March 27, 2003
								First Payment Date: April 25, 2003
	Servicer(s):		IndyMac Bank
								Distribution Date: November 25, 2003
								Distribution Date: December 26, 2003
	Underwriter(s):		Bear, Stearns & Co. Inc					Record Date: ~~October~~November 3128, 2003
						Page 1 of 21					© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A4
	Mortgage Pass-Through Certificates
	Series 2003-A4
	Certificate Payment Report for November 25, 2003 Distribution
	Certificate Payment Report for December 26, 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	PAC,AS	121,359,118.00			110,572,174.45	391,609.78	-932,754.67	~~391~~1,~~609~~324,364.7845	-	-	~~110~~109,~~572~~639,~~174~~419.4578
A-2	PAC,CPT,AS	55,000,000.00			4645,~~198~~259,~~953~~577.4548	~~221~~216,~~369~~868.9981	~~939~~1,~~375~~212,828.9717	1,~~160~~429,~~745~~696.9698	-	-	4544,~~259~~046,~~577~~749.4831
A-3	FLT,PAC,AS	66,195,882.00			60,312,094.66	76,~~395~~332.3249	-508,775.27	76585,~~395~~107.3276	-	-	6059,~~312~~803,~~094~~319.6639
A-4	IO,INV,NTL	-			-	350,~~815~~878.3518	-	350,~~815~~878.3518	-	-	-
A-5	TAC,AS	45,298,500.00			4039,~~486~~068,~~528~~117.3459	~~202~~195,~~432~~340.6459	1,~~418~~584,~~410~~383.7536	1,~~620~~779,~~843~~723.3995	-	-	3937,~~068~~483,~~117~~734.5923
A-6	PO,TAC	1,969,500.00			1,~~760~~698,~~283~~613.8481	-	6168,~~670~~886.0323	6168,~~670~~886.0323	-	-	1,~~698~~629,~~613~~727.8158
A-7	FLT,DLY,SUP	23,513,906.00			96,~~121~~420,~~113~~049.3518	1712,~~786~~512.1741	21,~~701~~133,~~064~~544.1747	21,~~718~~146,~~850~~056.3488	-	-	65,~~420~~286,~~049~~504.1871
A-8	INV,DLY,SUP	9,201,094.00			32,~~569~~512,~~131~~193.4525	4330,~~021~~287.2592	1443,~~056,938~~560.2090	1473,~~099,959~~848.4582	-	-	2,~~512~~068,~~193~~632.2536
A-9	SEQ,AS	11,500,000.00			11,500,000.00	55,104.17	-	55,104.17	-	-	11,500,000.00
PO	PO,RSTP	210,914.00			187,~~804~~409.2375	-	~~394~~1,380.4888	~~394~~1,380.4888	-	-	~~187~~186,~~409~~028.7587
A-X	IO,CSTR,NTL	-			-	8883,~~595~~892.7313	-	8883,~~595~~892.7313	-	-	-
A-R	R,AS	100.00			-	-	-	-	-	-	-
B-1	SUB,NAS	8,400,000.00			8,~~273~~250,~~433~~980.4239	39,~~643~~535.5495	228,~~453~~065.0462	6247,~~096~~601.5857	-	-	8,~~250~~242,~~980~~914.3977
B-2	SUB,NAS	2,625,000.00			2,~~585~~578,~~447~~431.9437	12,~~388~~354.6098	72,~~016~~520.5751	1914,~~405~~875.1749	-	-	2,~~578~~575,~~431~~910.3787
B-3	SUB,NAS	1,925,000.00			1,~~895~~890,~~995~~849.1667	9,~~084~~060.9832	51,~~145~~848.4937	1410,~~230~~908.4769	-	-	1,~~890~~889,~~849~~001.6730
B-4	SUB,NAS	1,050,000.00			1,~~034~~031,~~179~~372.1855	4,~~955~~941.4499	21,~~806~~008.6320	75,~~762~~950.0719	-	-	1,~~031~~030,~~372~~364.5535
B-5	SUB,NAS	525,000.00			~~517~~515,~~089~~686.5927	2,~~477~~471.7200	~~1,403~~504.3110	32,~~881~~975.0310	-	-	515,~~686~~182.2717
B-6	SUB,NAS	1,225,985.52			1,~~207~~204,~~513~~236.1108	5,~~786~~770.0030	31,~~277~~177.0418	96,~~063~~947.0448	-	-	1,~~204~~203,~~236~~058.0890
P		100.00			100.00	183,~~407~~055.3992	-	183,~~407~~055.3992	-	-	100.00
Total		350,000,099.52			~~299~~293,~~221~~001,~~842~~886.1850	1,~~539~~490,~~874~~016.0794	65,~~219~~901,~~955~~237.6893	7,~~759~~391,~~829~~254.7587	-	-	~~293~~287,~~001~~100,~~886~~648.5057
	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	45660NPF6	121,359,118.00	911.115508	3.226867	-7.685905	310.~~226867~~912773	~~911~~903.~~115508~~429603
A-2				F-30/360	45660NPG4	55,000,000.00	~~839~~822.~~980972~~901409	43.~~024909~~943069	1722.~~079563~~051421	2125.~~104472~~994491	~~822~~800.~~901409~~849987
A-3				A-30/360	45660NPH2	66,195,882.00	911.115508	1.~~154080~~153130	-7.685905	18.~~154080~~839036	~~911~~903.~~115508~~429603
A-4				A-30/360	45660NPJ8	66,195,882.00	911.115508	5.~~299655~~300604	-	5.~~299655~~300604	~~911~~903.~~115508~~429603
A-5				F-30/360	45660NPK5	45,298,500.00	~~893~~862.~~771943~~459410	4.~~468860~~312297	3134.~~312532~~976508	3539.~~781392~~288805	~~862~~827.~~459410~~482902
A-6				-30/360	45660NPL3	1,969,500.00	~~893~~862.~~771943~~459410	-	3134.~~312532~~976508	3134.~~312532~~976508	~~862~~827.~~459410~~482902
A-7				A-30/360	45660NPM1	23,513,906.00	~~387~~273.~~902944~~032017	0.~~756411~~532128	~~114~~48.~~870927~~207408	~~115~~48.~~627337~~739536	~~273~~224.~~032017~~824609
A-8				A-30/360	45660NPN9	9,201,094.00	~~387~~273.~~902944~~032017	43.~~675667~~291774	~~114~~48.~~870927~~207408	~~119~~51.~~546594~~499182	~~273~~224.~~032017~~824609
A-9				F-30/360	45660NPP4	11,500,000.00	1,000.000000	4.791667	-	4.791667	1,000.000000
PO				-30/360	45660NPQ2	210,914.00	~~890~~888.~~430365~~560029	-	16.~~870336~~547123	16.~~870336~~547123	~~888~~882.~~560029~~012906
A-X				A-30/360	45660NPR0	275,071,562.00	~~844~~822.~~724732~~703800	0.~~322082~~304983	-	0.~~322082~~304983	~~822~~804.~~703800~~588292
A-R				F-30/360	45660NPS8	100.00	-	-	-	-	-
B-1				F-30/360	45660NPT6	8,400,000.00	~~984~~982.~~932550~~259570	4.~~719469~~706661	20.~~672981~~960193	75.~~392450~~666853	~~982~~981.~~259570~~299377
B-2				F-30/360	45660NPU3	2,625,000.00	~~984~~982.~~932550~~259570	4.~~719467~~706659	20.~~672981~~960193	75.~~392447~~666852	~~982~~981.~~259570~~299377
B-3				F-30/360	45660NPV1	1,925,000.00	~~984~~982.~~932550~~259570	4.~~719470~~706660	20.~~672981~~960193	75.~~392451~~666852	~~982~~981.~~259570~~299377
B-4				F-30/360	45660NPW9	1,050,000.00	~~984~~982.~~932550~~259570	4.~~719467~~706657	20.~~672981~~960193	75.~~392447~~666850	~~982~~981.~~259570~~299377
B-5				F-30/360	45660NPX7	525,000.00	~~984~~982.~~932550~~259570	4.~~719467~~706667	20.~~672981~~960193	75.~~392447~~666859	~~982~~981.~~259570~~299377
B-6				F-30/360	45660NPY5	1,225,985.52	~~984~~982.~~932607~~259626	4.~~719468~~706662	20.~~672981~~960193	75.~~392449~~666855	~~982~~981.~~259626~~299434
P				-		100.00	1,000.000000	~~184~~30,~~073~~559.~~900000~~200000	-	~~184~~30,~~073~~559.~~900000~~200000	1,000.000000
							Page 2 of 21				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A4
	Mortgage Pass-Through Certificates
	Series 2003-A4
	Certificate Payment Report for November 25, 2003 Distribution
	Certificate Payment Report for December 26, 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	121,359,118.00		3,~~283~~675,~~906~~516.4725		-	1011,~~786~~719,~~943~~698.5522	1011,~~786~~719,~~943~~698.5522	1415,~~070~~395,~~850~~214.0247	-	-	~~110~~109,~~572~~639,~~174~~419.4578
A-2	55,000,000.00		12,~~978~~195,~~956~~825.8162		-	910,~~740~~953,~~422~~250.5269	910,~~740~~953,~~422~~250.5269	1113,~~719~~149,~~379~~076.3331	-	-	4544,~~259~~046,~~577~~749.4831
A-3	66,195,882.00		~~668~~744,~~354~~687.7625		-	56,~~883~~392,~~787~~562.3461	56,~~883~~392,~~787~~562.3461	67,~~552~~137,~~142~~249.1086	-	-	6059,~~312~~803,~~094~~319.6639
A-4	-		23,~~914~~264,~~088~~966.6280		-	-	-	23,~~914~~264,~~088~~966.6280	-	-	-
A-5	45,298,500.00		1,~~747~~942,~~634~~974.3493		-	67,~~230~~814,~~382~~765.4177	67,~~230~~814,~~382~~765.4177	79,~~978~~757,~~016~~740.7570	-	-	3937,~~068~~483,~~117~~734.5923
A-6	1,969,500.00		-		-	~~270~~339,~~886~~772.1942	~~270~~339,~~886~~772.1942	~~270~~339,~~886~~772.1942	-	-	1,~~698~~629,~~613~~727.8158
A-7	23,513,906.00		~~311~~324,~~963~~476.9031		-	1718,~~093~~227,~~856~~401.8229	1718,~~093~~227,~~856~~401.8229	1718,~~405~~551,~~820~~877.7260	-	-	65,~~420~~286,~~049~~504.1871
A-8	9,201,094.00		~~720~~750,~~504~~792.2012		-	67,~~688~~132,~~900~~461.7564	67,~~688~~132,~~900~~461.7564	7,~~409~~883,~~404~~253.9576	-	-	2,~~512~~068,~~193~~632.2536
A-9	11,500,000.00		~~440~~495,~~833~~937.3653		-	-	-	~~440~~495,~~833~~937.3653	-	-	11,500,000.00
PO	210,914.00		-		-	2324,~~504~~885.2513	2324,~~504~~885.2513	2324,~~504~~885.2513	-	-	~~187~~186,~~409~~028.7587
A-X	-		~~812~~896,~~539~~431.1730		-	-	-	~~812~~896,~~539~~431.1730	-	-	-
A-R	100.00		47.49		-	100.00	100.00	147.49	-	-	-
B-1	8,400,000.00		~~320~~359,~~226~~762.9287		-	~~149~~157,~~019~~085.6123	~~149~~157,~~019~~085.6123	~~469~~516,~~246~~848.5310	-	-	8,~~250~~242,~~980~~914.3977
B-2	2,625,000.00		~~100~~112,~~070~~425.9290		-	4649,~~568~~089.6313	4649,~~568~~089.6313	~~146~~161,~~639~~515.5503	-	-	2,~~578~~575,~~431~~910.3787
B-3	1,925,000.00		7382,~~385~~445.3466		-	3435,~~150~~998.3370	3435,~~150~~998.3370	~~107~~118,~~535~~444.6736	-	-	1,~~890~~889,~~849~~001.6730
B-4	1,050,000.00		4044,~~028~~970.3635		-	1819,~~627~~635.4565	1819,~~627~~635.4565	5864,~~655~~606.8100	-	-	1,~~031~~030,~~372~~364.5535
B-5	525,000.00		2022,~~014~~485.19		-	9,~~313~~817.7383	9,~~313~~817.7383	2932,~~327~~303.9202	-	-	515,~~686~~182.2717
B-6	1,225,985.52		4652,~~737~~507.3464		-	2122,~~749~~926.4462	2122,~~749~~926.4462	6875,~~486~~434.7826	-	-	1,~~204~~203,~~236~~058.0890
P	100.00		4447,~~922~~978.1103		-	-	-	4447,~~922~~978.1103	-	-	100.00
Total	350,000,099.52		1315,~~524~~014,~~214~~231.3024		-	5662,~~998~~899,~~213~~450.0295	5662,~~998~~899,~~213~~450.0295	7077,~~522~~913,~~427~~682.3219	-	-	~~293~~287,~~001~~100,~~886~~648.5057
	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	4.25000%	110,572,174.45			391,609.78	-	-	-	391,609.78	391,609.78	-
A-2	5.75000%	4645,~~198~~259,~~953~~577.4548			~~221~~216,~~369~~868.9981	-	-	-	~~221~~216,~~369~~868.9981	~~221~~216,~~369~~868.9981	-
A-3	1.~~52000~~51875%	60,312,094.66			76,~~395~~332.3249	-	-	-	76,~~395~~332.3249	76,~~395~~332.3249	-
A-4	6.~~98000~~98125%	60,312,094.66			350,~~815~~878.3518	-	-	-	350,~~815~~878.3518	350,~~815~~878.3518	-
A-5	6.00000%	4039,~~486~~068,~~528~~117.3459			~~202~~195,~~432~~340.6459	-	-	-	~~202~~195,~~432~~340.6459	~~202~~195,~~432~~340.6459	-
A-6		1,~~760~~698,~~283~~613.8481			-	-	-	-	-	-	-
A-7	2.~~34000~~33875%	96,~~121~~420,~~113~~049.3518			1712,~~786~~512.1741	-	-	-	1712,~~786~~512.1741	1712,~~786~~512.1741	-
A-8	########	32,~~569~~512,~~131~~193.4525			4330,~~021~~287.2592	-	-	-	4330,~~021~~287.2592	4330,~~021~~287.2592	-
A-9	5.75000%	11,500,000.00			55,104.17	-	-	-	55,104.17	55,104.17	-
PO		187,~~804~~409.2375			-	-	-	-	-	-	-
A-X	0.~~45754~~44485%	~~232~~226,~~359~~302,~~751~~419.4934			8883,~~595~~892.7313	-	-	-	8883,~~595~~892.7313	8883,~~595~~892.7313	-
A-R	5.75000%	-			-	-	-	-	-	-	-
B-1	5.75000%	8,~~273~~250,~~433~~980.4239			39,~~643~~535.5495	-	-	-	39,~~643~~535.5495	39,~~643~~535.5495	-
B-2	5.75000%	2,~~585~~578,~~447~~431.9437			12,~~388~~354.6098	-	-	-	12,~~388~~354.6098	12,~~388~~354.6098	-
B-3	5.75000%	1,~~895~~890,~~995~~849.1667			9,~~084~~060.9832	-	-	-	9,~~084~~060.9832	9,~~084~~060.9832	-
B-4	5.75000%	1,~~034~~031,~~179~~372.1855			4,~~955~~941.4499	-	-	-	4,~~955~~941.4499	4,~~955~~941.4499	-
B-5	5.75000%	~~517~~515,~~089~~686.5927			2,~~477~~471.7200	-	-	-	2,~~477~~471.7200	2,~~477~~471.7200	-
B-6	5.75000%	1,~~207~~204,~~513~~236.1108			5,~~786~~770.0030	-	-	-	5,~~786~~770.0030	5,~~786~~770.0030	-
P		100.00			-	-	-	-	-	183,~~407~~055.3992	-
Total		~~591~~579,~~893~~616,~~688~~400.3350			1,~~521~~486,~~466~~961.6802	-	-	-	1,~~521~~486,~~466~~961.6802	1,~~539~~490,~~874~~016.0794	-
							Page 3 of 21				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A4
	Mortgage Pass-Through Certificates
	Collection Account Report for November 25, 2003 Distribution
	Collection Account Report for December 26, 2003 Distribution
	Collection Account Report
SUMMARY								TOTAL
	Principal Collections							65,~~219~~901,~~955~~237.6893
	Principal Withdrawals							0.00
	Principal Other Accounts							0.00
	TOTAL PRINCIPAL							65,~~219~~901,~~955~~237.6893
	Interest Collections							1,~~599~~563,~~229~~035.0030
	Interest Withdrawals							(7776,~~762~~074.3228)
	Interest Other Accounts							0.00
	TOTAL INTEREST							1,~~521~~486,~~466~~961.6802
	TOTAL AVAILABLE FUNDS TO BONDHOLDERS							7,~~741~~388,~~422~~198.3695
	Interest Payable to Bondholders							1,~~521~~486,~~466~~961.6802
	Principal Payment Amount Payable to Bondholders							65,~~219~~901,~~955~~237.6893
PRINCIPAL - COLLECTIONS								TOTAL
	Scheduled Principal							~~289~~286,~~915~~623.0570
	Curtailments							7443,~~498~~084.6439
	Prepayments in Full							5,~~333~~571,~~203~~529.7084
	Repurchases/Substitutions							~~522,338~~0.2900
	Liquidations							0.00
	Insurance Principal							0.00
	Other Additional Principal							0.00
	LESS: Delinquent Principal							(4,~~690~~718.21)
	LESS: Realized Losses							0.00
	Principal Advanced							4,~~690~~718.21
	TOTAL PRINCIPAL							65,~~219~~901,~~955~~237.6893
				Page 4 of 21				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A4
	Mortgage Pass-Through Certificates
	Collection Account Report for November 25, 2003 Distribution
	Collection Account Report for December 26, 2003 Distribution
	Collection Account Report
PRINCIPAL - WITHDRAWALS								TOTAL
SPACE INTENTIONALLY LEFT BLANK
PRINCIPAL - OTHER ACCOUNTS								TOTAL
SPACE INTENTIONALLY LEFT BLANK
INTEREST - COLLECTIONS								TOTAL
	Scheduled Interest							1,~~595~~563,~~202~~035.6430
	Repurchases/Substitutions							~~4,026~~0.3600
	Liquidations							0.00
	Insurance Interest							0.00
	Other Additional Interest							0.00
	Prepayment Interest Shortfalls							(117,~~439~~663.4057)
	Delinquent Interest							(29,~~481~~453.4947)
	Interest Realized Losses							0.00
	Compensating Interest							117,~~439~~663.4057
	Interest Advanced							29,~~481~~453.4947
	Capitalized Interest							0.00
	TOTAL INTEREST							1,~~599~~563,~~229~~035.0030
				Page 5 of 21				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A4
	Mortgage Pass-Through Certificates
	Collection Account Report for November 25, 2003 Distribution
	Collection Account Report for December 26, 2003 Distribution
	Collection Account Report
INTEREST - WITHDRAWALS								TOTAL
SPACE INTENTIONALLY LEFT BLANK
INTEREST - OTHER ACCOUNTS								TOTAL
SPACE INTENTIONALLY LEFT BLANK
INTEREST - FEES								TOTAL
	Master Servicing Fees							0.00
	Current Servicing Fees							7472,~~599~~951.4856
	Delinquent Servicing Fees							1,~~292~~291.7046
	Trustee Fees							1,~~870~~831.1426
	TOTAL INTEREST FEES							7776,~~762~~074.3228
				Page 6 of 21				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A4
	Mortgage Pass-Through Certificates
	Credit Enhancement Report for November 25, 2003 Distribution
	Credit Enhancement Report for December 26, 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 21				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A4
	Mortgage Pass-Through Certificates
	Collateral Report for November 25, 2003 Distribution
	Collateral Report for December 26, 2003 Distribution
	Collateral Report
COLLATERAL								TOTAL
	Loan Count:
	Original							1045
	Prior							~~923~~905
	Prefunding							-
	Scheduled Paid Offs							-
	Full Voluntary Prepayments							(1718)
	Repurchases							~~(1)~~-
	Liquidations							-
	Current							~~905~~887
	Principal Balance:
	Original							349,999,381.33
	Prior							~~299~~293,~~221~~001,~~742~~786.1143
	Prefunding							-
	Scheduled Principal							(~~289~~286,~~915~~623.0570)
	Partial and Full Voluntary Prepayments							(5,~~407~~614,~~702~~614.3423)
	Repurchases							~~(522,338.29)~~-
	Liquidations							-
	Current							~~293~~287,~~001~~100,~~786~~548.4350
PREFUNDING								TOTAL
	Remaining Pre-Funding Amount							0.00
Current Prin Balance by Groups (in millions of dollars)					Total Current Principal Balance (in millions of dollars)
				Page 8 of 21				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A4
	Mortgage Pass-Through Certificates
	Collateral Report for November 25, 2003 Distribution
	Collateral Report for December 26, 2003 Distribution
	Collateral Report
CHARACTERISTICS								TOTAL
	Weighted Average Coupon Original							6.434559%
	Weighted Average Coupon Prior							6.~~421881~~413554%
	Weighted Average Coupon Current							6.~~413554~~401471%
	Weighted Average Months to Maturity Original							357
	Weighted Average Months to Maturity Prior							~~351~~350
	Weighted Average Months to Maturity Current							~~350~~348
	Weighted Avg Remaining Amortization Term Original							-
	Weighted Avg Remaining Amortization Term Prior							-
	Weighted Avg Remaining Amortization Term Current							-
	Weighted Average Seasoning Original							2.54
	Weighted Average Seasoning Prior							78.6970
	Weighted Average Seasoning Current							89.7067
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 21				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A4
	Mortgage Pass-Through Certificates
	Collateral Report for November 25, 2003 Distribution
	Collateral Report for December 26, 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							0.000%
	Weighted Average Max Rate Prior							0.000%
	Weighted Average Max Rate Current							0.000%
	Weighted Average Min Rate Original							0.000%
	Weighted Average Min Rate Prior							0.000%
	Weighted Average Min Rate Current							0.000%
	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 PPIS							117,~~439~~663.4057
	Current Net PPIS							0.00
	Delinquent Servicing Fees							1,~~292~~291.7046
	TOTAL SERVICING FEES							7574,~~892~~243.1802
	TOTAL ADVANCES FOR CURRENT PERIOD							32,~~879~~880.0022
ADDITIONAL COLLATERAL INFORMATION								TOTAL
	Net Mortgage Rate							6.~~101696~~089906%
				Page 10 of 21				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A4
	Mortgage Pass-Through Certificates
	Delinquency Report for November 25, 2003 Distribution
	Delinquency Report for December 26, 2003 Distribution
	Delinquency Report - Total
				<1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT		Balance		-	~~2,912,819.73~~-	-2,909,731.43	357,~~811~~571.0034	3,~~270~~267,~~630~~302.7377
		% Balance			0.9900%	01.0001%	0.12%	1.1214%
		# Loans			11-	-11	3	14
		% # Loans			10.2200%	01.0024%	0.3334%	1.5558%
FORECLOSURE		Balance		-	-	-	1,~~262~~261,~~749~~775.1984	1,~~262~~261,~~749~~775.1984
		% Balance		0.00%	0.00%	0.00%	0.4344%	0.4344%
		# Loans		-	-	-	5	5
		% # Loans		0.00%	0.00%	0.00%	0.5556%	0.5556%
BANKRUPTCY		Balance		-	-	~~396,260.57~~-	-395,843.67	~~396~~395,~~260~~843.5767
		% Balance		0.00%	0.00%	0.1400%	0.0014%	0.14%
		# Loans		-	-	1-	-1	1
		% # Loans		0.00%	0.00%	0.1100%	0.0011%	0.11%
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		-	~~2,912,819.73~~-	~~396~~2,~~260~~909,731.5743	12,~~620~~015,~~560~~190.1985	4,~~929~~924,~~640~~922.4928
		% Balance		0.00%	0.9900%	01.1401%	0.5570%	1.6872%
		# Loans		-	11-	111	89	20
		% # Loans		0.00%	10.2200%	01.1124%	01.8801%	2.2125%
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 21				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A4
	Mortgage Pass-Through Certificates
	REO Report for November 25, 2003 Distribution
	REO Report for December 26, 2003 Distribution
	REO Report - Mortgage Loans that Become REO During Current Distribution
SUMMARY				LOAN GROUP
Total Loan Count = 0				Loan Group 1 = Group I 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 21				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A4
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	Prepayment Report for November 25, 2003 Distribution
	Prepayment Report for December 26, 2003 Distribution
	Prepayment Report - Voluntary Prepayments
VOLUNTARY PREPAYMENTS								TOTAL
	Current
	Number of Paid in Full Loans							1718
	Number of Repurchased Loans							1-
	Total Number of Loans Prepaid in Full							18
	Paid in Full Balance							5,~~333~~571,~~203~~529.7084
	Repurchased Loans Balance							~~522,338.29~~-
	Curtailments Amount							7443,~~498~~084.6439
	Total Prepayment Amount							5,~~930~~614,~~040~~614.6323
	Cumulative
	Number of Paid in Full Loans							~~133~~151
	Number of Repurchased Loans							7
	Total Number of Loans Prepaid in Full							~~140~~158
	Paid in Full Balance							5056,~~859~~431,~~922~~452.7256
	Repurchased Loans Balance							3,282,032.69
	Curtailments Amount							~~369~~412,~~162~~247.6302
	Total Prepayment Amount							5460,~~511~~125,~~118~~732.0427
SPACE INTENTIONALLY LEFT BLANK
Total Prepayments by Groups (in thousands of dollars)					Total Prepayments (in thousands of dollars)
				Page 13 of 21				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A4
	Mortgage Pass-Through Certificates
	Prepayment Report for November 25, 2003 Distribution
	Prepayment Report for December 26, 2003 Distribution
	Prepayment Report - Voluntary Prepayments
VOLUNTARY PREPAYMENT RATES								TOTAL
	SMM							1.9892%
	3 Months Avg SMM							2.7061%
	12 Months Avg SMM
	Avg SMM Since Cut-off							2.1108%
	CPR							2120.3774%
	3 Months Avg CPR							27.9919%
	12 Months Avg CPR
	Avg CPR Since Cut-off							22.5334%
	PSA							~~1228~~1072.8561%
	3 Months Avg PSA Approximation							~~1804~~1565.5331%
	12 Months Avg PSA Approximation
	Avg PSA Since Cut-off Approximation							~~2009~~1843.9085%
CPR by Groups					Total CPR
PSA by Groups					Total PSA
				Page 14 of 21				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A4
	Mortgage Pass-Through Certificates
	Prepayment Report for November 25, 2003 Distribution
	Prepayment Report for December 26, 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 21				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A4
	Mortgage Pass-Through Certificates
	Prepayment Detail Report for November 25, 2003 Distribution
	Prepayment Detail Report for December 26, 2003 Distribution
	Prepayment Detail Report - Loans Prepaid in Full During Current Distribution
SUMMARY						LOAN GROUP
Total Loan Count = 18						Loan Group 1 = Group I Group
Total Original Principal Balance = 5,896,450.00
Total Original Principal Balance = 5,629,125.00
Total Prepayment Amount = 5,855,541.99
Total Prepayment Amount = 5,571,529.84
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
1870589 1			351,200.00	347,939.40	Nov-03-03	7.000%	MA - 79.46%	Paid Off - 360	Oct-25-02
906201 1			503,100.00	485,523.39	Nov-18-03	7.500%	NJ - 90.00%	Paid Off - 360	Feb-09-01
1938796 1			492,500.00	488,244.78	Nov-12-03	7.500%	CA - 54.72%	Paid Off - 360	Oct-25-02
2039787 1			340,000.00	337,279.42	Nov-17-03	7.250%	CA - 80.00%	Paid Off - 360	Feb-19-03
2016251 1			231,750.00	230,392.96	Oct-29-03	9.750%	OR - 95.00%	Paid Off - 360	Sep-10-02
2115770 1			396,000.00	393,391.31	Nov-28-03	6.375%	CA - 53.51%	Paid Off - 360	Mar-04-03
2101680 1			385,000.00	382,399.59	Oct-28-03	6.250%	CA - 67.54%	Paid Off - 360	Feb-24-03
2153479 1			259,550.00	257,858.07	Nov-24-03	7.750%	MA - 86.52%	Paid Off - 360	Oct-30-02
2139766 1			250,000.00	248,410.94	Oct-27-03	6.500%	NY - 58.82%	Paid Off - 360	Mar-01-03
2153494 1			272,175.00	269,984.12	Nov-20-03	8.500%	TX - 93.86%	Paid Off - 360	Sep-06-02
2162604 1			328,000.00	325,784.47	Nov-13-03	6.375%	CA - 62.48%	Paid Off - 360	Feb-19-03
2159042 1			420,000.00	416,595.99	Nov-01-03	6.000%	CA - 64.61%	Paid Off - 360	Feb-25-03
2164592 1			205,000.00	203,712.75	Oct-16-03	6.625%	DC - 53.25%	Paid Off - 360	Feb-28-03
2165325 1			118,500.00	117,341.83	Nov-18-03	6.500%	FL - 53.86%	Paid Off - 360	Feb-21-03
2170936 1			480,000.00	477,421.90	Nov-05-03	6.625%	CA - 80.00%	Paid Off - 360	Feb-28-03
2207663 1			335,000.00	332,460.76	Nov-08-03	6.375%	CA - 69.79%	Paid Off - 360	Feb-13-03
2191252 1			601,000.00	596,945.31	Nov-03-03	6.250%	CA - 63.20%	Paid Off - 360	Feb-21-03
2217445 1			400,000.00	396,758.10	Nov-09-03	6.000%	CA - 80.00%	Paid Off - 360	Aug-02-02
2205546 1			440,000.00	437,101.42	Nov-04-03	6.375%	CA - 80.00%	Paid Off - 360	Nov-08-01
2222960 1			144,000.00	142,929.20	Nov-21-03	6.500%	CA - 52.56%	Paid Off - 360	Feb-24-03
2241577 1			132,000.00	127,859.01	Oct-16-03	6.500%	NY - 80.00%	Paid Off - 360	Mar-18-03
2223831 1			650,000.00	645,754.19	Nov-14-03	7.125%	CA - 72.22%	Paid Off - 360	Feb-21-03
2249933 1			80,000.00	79,434.09	Nov-04-03	6.000%	NJ - 40.00%	Paid Off - 360	Feb-21-03
2224848 1			150,000.00	148,894.41	Nov-20-03	6.500%	CA - 50.85%	Paid Off - 360	Feb-07-03
2250933 1			185,000.00	183,982.83	Oct-28-03	6.500%	NJ - 71.15%	Paid Off - 360	Mar-11-03
2235187 1			260,000.00	258,245.94	Nov-04-03	6.250%	CA - 57.78%	Paid Off - 360	Mar-05-03
2264625 1			350,000.00	348,101.04	Nov-05-03	7.375%	MA - 76.09%	Paid Off - 360	Mar-03-03
2287499 1			298,000.00	295,601.08	Nov-17-03	6.250%	CA - 66.22%	Paid Off - 360	Feb-25-03
2264998 1			153,000.00	151,967.75	Nov-10-03	6.250%	MD - 54.64%	Paid Off - 360	Feb-26-03
2289079 1			252,000.00	247,911.40	Nov-02-03	6.625%	NY - 56.00%	Paid Off - 360	Jan-03-03
2276275 1			208,000.00	206,771.44	Oct-31-03	6.125%	CA - 59.09%	Paid Off - 360	Mar-19-03
2322110 1			360,000.00	357,346.58	Nov-04-03	6.500%	OK - 80.00%	Paid Off - 360	Feb-27-03
2313828 1			500,000.00	496,734.02	Nov-05-03	7.125%	FL - 79.36%	Paid Off - 360	Feb-05-03
2333702 1			190,800.00	189,543.11	Nov-01-03	6.375%	CA - 80.00%	Paid Off - 360	Mar-19-03
2126835 1			524,000.00	522,338.29	Oct-31-03	9.250%	NY - 80.00%	Repur/Subs - 360	Mar-17-03
2344967 1			280,000.00	278,110.94	Nov-09-03	6.250%	CA - 47.86%	Paid Off - 360	Mar-11-03
					Page 16 of 21				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A4
	Mortgage Pass-Through Certificates
	Realized Loss Report for November 25, 2003 Distribution
	Realized Loss Report for December 26, 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.
SPACE INTENTIONALLY LEFT BLANK
							3 Months Moving Average
Collateral Loss Severity Approximation by Groups					Collateral Loss Severity Approximation
				Page 17 of 21				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A4
	Mortgage Pass-Through Certificates
	Realized Loss Report for November 25, 2003 Distribution
	Realized Loss Report for December 26, 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 21				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A4
	Mortgage Pass-Through Certificates
	Realized Loss Report for November 25, 2003 Distribution
	Realized Loss Report for December 26, 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 21				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A4
	Mortgage Pass-Through Certificates
	Realized Loss Detail Report for November 25, 2003 Distribution
	Realized Loss Detail Report for December 26, 2003 Distribution
	Realized Loss Detail Report - Loans Liquidated During Current Distribution
SUMMARY						LOAN GROUP
Total Loan Count = 0						Loan Group 1 = Group I 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 21				© COPYRIGHT 2003 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2003-A4
	Mortgage Pass-Through Certificates
	Triggers, Adj. Rate Cert. and Miscellaneous Report for November 25, 2003 Distribution
	Triggers, Adj. Rate Cert. and Miscellaneous Report for December 26, 2003 Distribution
	Triggers, Adj. Rate Cert. and Miscellaneous Report
TRIGGER EVENTS								TOTAL
	Senior Credit Depletion Date							No
ADJUSTABLE RATE CERTIFICATE INFORMATION								TOTAL
SPACE INTENTIONALLY LEFT BLANK
ADDITIONAL INFORMATION								TOTAL
	Senior Percentage							94.~~815330~~719638%
	Subordinate Percentage							5.~~184670~~280362%
	Senior Prepayment Percentage							100.000000%
	Subordinate Prepayment Percentage							0.000000%
	Current Special Hazard Loss Coverage Amount							3,~~847~~843,~~675~~929.5626
	Current Fraud Loss Coverage Amount							3,500,000.00
	Current Bankruptcy Loss Coverage Amount							100,000.00
				Page 21 of 21				© COPYRIGHT 2003 Deutsche Bank

Filing Compare · INDYMAC MBS INC RESIDENTIAL ASSET SECUR TRUST 2003-A4