
                                       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):  December 27, 2004
                          (Date of earliest event reported)

            Indymac MBS Inc (as Depositor under the Pooling and Servicing
                Agreement, dated as March 1, 2004, providing for the
        issuance of Residential Asset Securitization Trust Series 2004-A2
                Mortgage Pass-Through Certificates, Series 2004-B)
                 (Exact name of registrant as specified in charter)


                                          DELAWARE
                     (State or Other Jurisdiction of Incorporation)

               333-102888-19                         95-4791925
          (Commission File Number)        (I.R.S. Employer Identification No.)


          155 NORTH LAKE AVENUE
          PASADENA, CALIFORNIA                         91101
          (Address of principal executive offices)     (Zip Code)


          Registrant's Telephone Number, Including Area Code:  (800) 669-2300


          (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any
of the following provisions (see General Instruction A.2. below):

[  ] Written communications pursuant to Rule 425 under the Securities Act
(17 CFR 230.425)

[  ] Soliciting material pursuant to Rule 14a-12(b) under the Exchange Act
(17 CFR 240.14a-12(b))

[  ] Pre-commencement communications pursuant to Rule 14d-2(b) under the
Exchange Act (17 CFR 240.14d-2(b))

[  ] Pre-commencement communications pursuant to Rule 13e-4(c) under the
Exchange Act (17 CFR 240.13e-4(c))


     Item 8.01  Other Events

     Attached hereto is a copy of the Monthly Remittance Statements to the
     Certificateholders which was derived from the monthly information
     submitted by the Master Servicer of the Trust to the Trustee.


     Item 9.01 Financial Statements and Exhibits

     (c) Exhibits:

     Exhibit No. Description

     99.1 Monthly Remittance Statement to the Certificateholders dated as of
     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 its
          behalf by the undersigned, hereunto duly authorized.


                                  Deutsche Bank National Trust Company,
                                  in its capacity as Trustee under the
                                  Pooling and Servicing Agreement on
                                  behalf of Indymac MBS Inc, Registrant


          Date:  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 December 27, 2004.


	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates


	December 27, 2004 Distribution


	Contents



			TABLE OF CONTENTS

								Page

			1.	Contents				1
			2.	Certificate Payment Report				2
			3.	Collection Account Report				6
			4.	Credit Enhancement Report				9
			5.	Collateral Report				10
			6.	Delinquency Report				13
			7.	REO Report				16
			8.	Prepayment Report				17
			9.	Prepayment Detail Report				20
			10.	Realized Loss Report				21
			11.	Realized Loss Detail Report				24
			12.	Triggers, Adj. Rate Cert. and Miscellaneous Report				25
			13.	Other Related Information				26
			14.	Additional Certificate Report				27



				Total Number of Pages				27



			CONTACTS

				Administrator: Brent Hoyler
				Direct Phone Number: (714)247-6322
				Address: Deutsche Bank
				1761 E. St. Andrew Place, Santa Ana, CA 92705

				Web Site: https://www.tss.db.com/invr
				Factor Information: (800) 735-7777
				Main Phone Number: (714) 247-6000



ISSUANCE INFORMATION

	Seller:		IndyMac Bank					Cut-Off Date: March 1, 2004
	Certificate Insurer(s):		MBIA Insurance Corporation					Closing Date: March 30, 2004
								First Payment Date: April 26, 2004
	Servicer(s):		IndyMac Bank Master Servicer


								Distribution Date: December 27, 2004
	Underwriter(s):		Goldman, Sachs & Co. Underwriter					Record Date: November 30, 2004







						Page 1 of 27					© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	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)

1-A-1		72,508,000.00			64,003,189.63	213,343.97	1,028,896.49	1,242,240.46	-	-	62,974,293.13
1-A-2		500,000.00			500,000.00	2,291.67	-	2,291.67	-	-	500,000.00
1-A-3		44,800,875.00			39,697,988.78	85,371.52	617,337.90	702,709.42	-	-	39,080,650.88
1-A-4		-			-	179,281.74	-	179,281.74	-	-	-
1-A-5		51,000,000.00			23,403,891.02	107,267.83	2,813,428.22	2,920,696.05	-	-	20,590,462.80
1-A-6		14,178,000.00			14,178,000.00	64,982.50	-	64,982.50	-	-	14,178,000.00
1-A-7		5,000,000.00			-	-	-	-	-	-	-
1-A-8		22,350,000.00			22,350,000.00	97,781.25	-	97,781.25	-	-	22,350,000.00
1-A-9		2,160,125.00			2,160,125.00	7,200.42	-	7,200.42	-	-	2,160,125.00
1-A-10		-			-	4,656.25	-	4,656.25	-	-	-
1-A-X		-			-	57,347.63	-	57,347.63	-	-	-
1-PO		952,462.50			829,353.01	-	2,276.27	2,276.27	-	-	827,076.74
1-B-1		5,252,000.00			4,854,619.62	22,250.34	12,274.92	34,525.26	-	-	4,842,344.70
1-B-2		1,788,000.00			1,652,715.13	7,574.94	4,178.90	11,753.84	-	-	1,648,536.24
1-B-3		1,006,000.00			929,883.35	4,261.97	2,351.21	6,613.18	-	-	927,532.13
1-B-4		671,000.00			620,230.34	2,842.72	1,568.25	4,410.97	-	-	618,662.09
1-B-5		335,000.00			309,653.00	1,419.24	782.96	2,202.20	-	-	308,870.04
1-B-6		1,006,493.00			930,339.05	4,264.05	2,352.37	6,616.42	-	-	927,986.68


Total		223,507,955.50			176,419,987.92	862,138.04	4,485,447.49	5,347,585.53	-	-	171,934,540.43


	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)

1-A-1				F-30/360	45660NB20	72,508,000.00	882.705214	2.942351	14.190110	17.132461	868.515104
1-A-2				F-30/360	45660NB38	500,000.00	1,000.000000	4.583340	-	4.583340	1,000.000000
1-A-3				A-30/360	45660NB46	44,800,875.00	886.098514	1.905577	13.779595	15.685172	872.318920
1-A-4				A-30/360	45660NB53	44,800,875.00	886.098514	4.001746	-	4.001746	872.318920
1-A-5				F-30/360	45660NB61	51,000,000.00	458.899824	2.103291	55.165259	57.268550	403.734565
1-A-6				F-30/360	45660NB79	14,178,000.00	1,000.000000	4.583333	-	4.583333	1,000.000000
1-A-7				F-30/360	45660NB87	5,000,000.00	-	-	-	-	-
1-A-8				F-30/360	45660NB95	22,350,000.00	1,000.000000	4.375000	-	4.375000	1,000.000000
1-A-9				F-30/360	45660NC29	2,160,125.00	1,000.000000	3.333335	-	3.333335	1,000.000000
1-A-10				F-30/360	45660NC94	22,350,000.00	1,000.000000	0.208333	-	0.208333	1,000.000000
1-A-X				A-30/360	45660NC45	184,665,882.00	754.387782	0.310548	-	0.310548	732.086650
1-PO				-	45660NC37	952,462.50	870.746103	-	2.389879	2.389879	868.356224
1-B-1				F-30/360	45660NC60	5,252,000.00	924.337323	4.236546	2.337190	6.573736	922.000133
1-B-2				F-30/360	45660NC78	1,788,000.00	924.337323	4.236544	2.337190	6.573734	922.000133
1-B-3				F-30/360	45660NC86	1,006,000.00	924.337323	4.236551	2.337190	6.573741	922.000133
1-B-4				F-30/360	45660ND85	671,000.00	924.337323	4.236542	2.337190	6.573733	922.000133
1-B-5				F-30/360	45660ND93	335,000.00	924.337323	4.236537	2.337190	6.573727	922.000133
1-B-6				F-30/360	45660NE27	1,006,493.00	924.337323	4.236542	2.337190	6.573732	922.000133


							Page 2 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	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)

1-A-1	72,508,000.00		2,046,591.81		7,582,956.32	1,950,750.55	9,533,706.87	11,580,298.68	-	-	62,974,293.13
1-A-2	500,000.00		20,625.03		-	-	-	20,625.03	-	-	500,000.00
1-A-3	44,800,875.00		600,959.29		4,549,773.79	1,170,450.33	5,720,224.12	6,321,183.41	-	-	39,080,650.88
1-A-4	-		1,932,715.40		-	-	-	1,932,715.40	-	-	-
1-A-5	51,000,000.00		1,780,711.71		19,587,368.19	10,822,169.01	30,409,537.20	32,190,248.91	-	-	20,590,462.80
1-A-6	14,178,000.00		584,842.50		-	-	-	584,842.50	-	-	14,178,000.00
1-A-7	5,000,000.00		79,986.26		3,416,632.55	1,583,367.45	5,000,000.00	5,079,986.26	-	-	-
1-A-8	22,350,000.00		880,031.25		-	-	-	880,031.25	-	-	22,350,000.00
1-A-9	2,160,125.00		64,803.78		-	-	-	64,803.78	-	-	2,160,125.00
1-A-10	-		41,906.25		-	-	-	41,906.25	-	-	-
1-A-X	-		683,707.70		-	-	-	683,707.70	-	-	-
1-PO	952,462.50		-		-	125,385.76	125,385.76	125,385.76	-	-	827,076.74
1-B-1	5,252,000.00		211,721.88		171,518.93	238,136.37	409,655.30	621,377.18	-	-	4,842,344.70
1-B-2	1,788,000.00		72,078.97		58,392.20	81,071.56	139,463.76	211,542.73	-	-	1,648,536.24
1-B-3	1,006,000.00		40,554.49		32,853.78	45,614.09	78,467.87	119,022.36	-	-	927,532.13
1-B-4	671,000.00		27,049.77		21,913.41	30,424.51	52,337.91	79,387.68	-	-	618,662.09
1-B-5	335,000.00		13,504.73		10,940.37	15,189.58	26,129.96	39,634.69	-	-	308,870.04
1-B-6	1,006,493.00		40,574.37		32,869.88	45,636.44	78,506.32	119,080.69	-	-	927,986.68


Total	223,507,955.50		9,122,365.19		35,465,219.43	16,108,195.64	51,573,415.07	60,695,780.26	-	-	171,934,540.43


	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)

1-A-1	4.00000%	64,003,189.63			213,343.97	-	-	-	213,343.97	213,343.97	-
1-A-2	5.50000%	500,000.00			2,291.67	-	-	-	2,291.67	2,291.67	-
1-A-3	2.58063%	39,697,988.78			85,371.52	-	-	-	85,371.52	85,371.52	-
1-A-4	5.41937%	39,697,988.78			179,281.74	-	-	-	179,281.74	179,281.74	-
1-A-5	5.50000%	23,403,891.02			107,267.83	-	-	-	107,267.83	107,267.83	-
1-A-6	5.50000%	14,178,000.00			64,982.50	-	-	-	64,982.50	64,982.50	-
1-A-7	5.50000%	-			-	-	-	-	-	-	-
1-A-8	5.25000%	22,350,000.00			97,781.25	-	-	-	97,781.25	97,781.25	-
1-A-9	4.00000%	2,160,125.00			7,200.42	-	-	-	7,200.42	7,200.42	-
1-A-10	0.25000%	22,350,000.00			4,656.25	-	-	-	4,656.25	4,656.25	-
1-A-X	0.49399%	139,309,685.21			57,347.63	-	-	-	57,347.63	57,347.63	-
1-PO		829,353.01			-	-	-	-	-	-	-
1-B-1	5.50000%	4,854,619.62			22,250.34	-	-	-	22,250.34	22,250.34	-
1-B-2	5.50000%	1,652,715.13			7,574.94	-	-	-	7,574.94	7,574.94	-
1-B-3	5.50000%	929,883.35			4,261.97	-	-	-	4,261.97	4,261.97	-
1-B-4	5.50000%	620,230.34			2,842.72	-	-	-	2,842.72	2,842.72	-
1-B-5	5.50000%	309,653.00			1,419.24	-	-	-	1,419.24	1,419.24	-
1-B-6	5.50000%	930,339.05			4,264.05	-	-	-	4,264.05	4,264.05	-


Total		377,777,661.91			862,138.04	-	-	-	862,138.04	862,138.04	-


							Page 3 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	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)

2-A-1		59,730,000.00			38,303,175.52	87,159.83	1,669,503.43	1,756,663.26	-	-	36,633,672.09
2-A-2		-			-	159,273.69	-	159,273.69	-	-	-
2-B-1		674,000.00			609,658.70	2,794.27	3,759.89	6,554.16	-	-	605,898.81
2-B-2		306,000.00			276,788.67	1,268.61	1,707.01	2,975.62	-	-	275,081.65
2-B-3		214,000.00			193,571.16	887.20	1,193.79	2,080.99	-	-	192,377.37
2-B-4		123,000.00			111,258.19	509.93	686.15	1,196.08	-	-	110,572.04
2-B-5		92,000.00			83,217.51	381.41	513.22	894.63	-	-	82,704.29
2-B-6		122,881.00			111,150.55	509.44	685.49	1,194.93	-	-	110,465.06
2-B-X		-			-	2,564.05	-	2,564.05	-	-	-
P		100.00			100.00	-	-	-	-	-	100.00
A-R		100.00			-	-	-	-	-	-	-


Total		61,262,081.00			39,688,920.29	255,348.43	1,678,048.99	1,933,397.42	-	-	38,010,871.30


	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)

2-A-1				A-30/360	45660ND28	59,730,000.00	641.271983	1.459230	27.950836	29.410066	613.321147
2-A-2				A-30/360	45660ND36	59,730,000.00	641.271983	2.666561	-	2.666561	613.321147
2-B-1				F-30/360	45660ND44	674,000.00	904.538127	4.145801	5.578475	9.724276	898.959652
2-B-2				F-30/360	45660ND51	306,000.00	904.538127	4.145784	5.578475	9.724259	898.959652
2-B-3				F-30/360	45660ND69	214,000.00	904.538127	4.145794	5.578475	9.724270	898.959652
2-B-4				F-30/360	45660NE35	123,000.00	904.538128	4.145772	5.578476	9.724248	898.959652
2-B-5				F-30/360	45660NE43	92,000.00	904.538127	4.145761	5.578475	9.724236	898.959652
2-B-6				F-30/360	45660NE50	122,881.00	904.538127	4.145800	5.578475	9.724275	898.959652
2-B-X				F-30/360	45660ND77	1,531,881.00	904.538127	1.673792	-	1.673792	898.959652
P				-	IN04021P1	100.00	1,000.000000	-	-	-	1,000.000000
A-R				F-30/360	45660NC52	100.00	-	-	-	-	-


							Page 4 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	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)

2-A-1	59,730,000.00		735,686.88		18,116,171.49	4,980,156.42	23,096,327.91	23,832,014.79	-	-	36,633,672.09
2-A-2	-		2,090,157.65		-	-	-	2,090,157.65	-	-	-
2-B-1	674,000.00		26,730.28		30,671.51	37,429.68	68,101.19	94,831.47	-	-	605,898.81
2-B-2	306,000.00		12,135.71		13,925.05	16,993.30	30,918.35	43,054.06	-	-	275,081.65
2-B-3	214,000.00		8,487.05		9,738.43	11,884.20	21,622.63	30,109.68	-	-	192,377.37
2-B-4	123,000.00		4,878.07		5,597.32	6,830.64	12,427.96	17,306.03	-	-	110,572.04
2-B-5	92,000.00		3,648.64		4,186.62	5,109.10	9,295.71	12,944.35	-	-	82,704.29
2-B-6	122,881.00		4,873.35		5,591.91	6,824.03	12,415.94	17,289.29	-	-	110,465.06
2-B-X	-		24,630.07		-	-	-	24,630.07	-	-	-
P	100.00		3,616.63		-	-	-	3,616.63	-	-	100.00
A-R	100.00		0.46		81.64	18.36	100.00	100.46	-	-	-


Total	61,262,081.00		2,914,844.79		18,185,963.97	5,065,245.73	23,251,209.70	26,166,054.49	-	-	38,010,871.30


	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)

2-A-1	2.73063%	38,303,175.52			87,159.83	-	-	-	87,159.83	87,159.83	-
2-A-2	4.98988%	38,303,175.52			159,273.69	-	-	-	159,273.69	159,273.69	-
2-B-1	5.50000%	609,658.70			2,794.27	-	-	-	2,794.27	2,794.27	-
2-B-2	5.50000%	276,788.67			1,268.61	-	-	-	1,268.61	1,268.61	-
2-B-3	5.50000%	193,571.16			887.20	-	-	-	887.20	887.20	-
2-B-4	5.50000%	111,258.19			509.93	-	-	-	509.93	509.93	-
2-B-5	5.50000%	83,217.51			381.41	-	-	-	381.41	381.41	-
2-B-6	5.50000%	111,150.55			509.44	-	-	-	509.44	509.44	-
2-B-X	2.22051%	1,385,644.77			2,564.05	-	-	-	2,564.05	2,564.05	-
P		100.00			-	-	-	-	-	-	-
A-R	5.50000%	-			-	-	-	-	-	-	-


Total		79,377,740.58			255,348.43	-	-	-	255,348.43	255,348.43	-


							Page 5 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	Collection Account Report for December 27, 2004 Distribution


	Collection Account Report


SUMMARY						GROUP 2	GROUP 1	TOTAL

	Principal Collections					1,678,048.99	4,485,447.49	6,163,496.48
	Principal Withdrawals					0.00	0.00	0.00
	Principal Other Accounts					0.00	0.00	0.00
	TOTAL PRINCIPAL					1,678,048.99	4,485,447.49	6,163,496.48

	Interest Collections					257,197.02	875,047.94	1,132,244.96
	Interest Withdrawals					0.00	0.00	0.00
	Interest Other Accounts					0.00	0.00	0.00

	Interest Fees					(1,848.59)	(12,909.90)	(14,758.49)
	TOTAL INTEREST					255,348.43	862,138.04	1,117,486.47

	TOTAL AVAILABLE FUNDS TO BONDHOLDERS					1,933,397.42	5,347,585.53	7,280,982.95


	Interest Payable to Bondholders					255,348.43	862,138.04	1,117,486.47
	Principal Payment Amount Payable to Bondholders					1,678,048.99	4,485,447.49	6,163,496.48


PRINCIPAL - COLLECTIONS						GROUP 2	GROUP 1	TOTAL

	Scheduled Principal					244,769.23	178,954.30	423,723.53
	Curtailments					34,010.75	13,782.00	47,792.75
	Prepayments in Full					1,399,269.01	4,026,682.90	5,425,951.91
	Repurchases/Substitutions					0.00	266,028.29	266,028.29
	Liquidations					0.00	0.00	0.00
	Insurance Principal					0.00	0.00	0.00
	Other Additional Principal					0.00	0.00	0.00
	LESS: Delinquent Principal					(219,752.49)	(152,069.75)	(371,822.24)
	LESS: Realized Losses					0.00	0.00	0.00
	PLUS: Recoveries					0.00	0.00	0.00
	PLUS: Substitution Shortfall Principal					0.00	0.00	0.00
	PLUS: Principal Loan Adjustments					0.00	0.00	0.00
	PLUS: Principal Advanced					219,752.49	152,069.75	371,822.24
	TOTAL PRINCIPAL					1,678,048.99	4,485,447.49	6,163,496.48


				Page 6 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	Collection Account Report for December 27, 2004 Distribution


	Collection Account Report


PRINCIPAL - WITHDRAWALS						GROUP 2	GROUP 1	TOTAL
SPACE INTENTIONALLY LEFT BLANK


PRINCIPAL - OTHER ACCOUNTS						GROUP 2	GROUP 1	TOTAL

	Cash Release					0.00	0.00	0.00

	TOTAL PRINCIPAL OTHER ACCOUNTS					0.00	0.00	0.00


INTEREST - COLLECTIONS						GROUP 2	GROUP 1	TOTAL

	Scheduled Interest					264,385.65	910,239.31	1,174,624.96
	Repurchases/Substitutions					0.00	1,939.79	1,939.79
	Liquidations					0.00	0.00	0.00
	Insurance Interest					0.00	0.00	0.00
	Other Additional Interest					0.00	0.00	0.00
	LESS: Prepayment Interest Shortfalls					(1,298.34)	(3,004.49)	(4,302.83)
	LESS: Delinquent Interest					(228,979.93)	(760,671.58)	(989,651.51)
	LESS: Interest Realized Losses					0.00	0.00	0.00
	PLUS: Compensating Interest					0.00	3,004.49	3,004.49
	LESS: Civil Relief Act Shorfalls					1,298.34	0.00	1,298.34
	PLUS: Substiution Shortfall Interest					0.00	0.00	0.00
	PLUS: Interest Loan Adjustments					0.00	0.00	0.00
	LESS: Excess, Special Hazard, Fraud, & Bankruptcy Interest Losses					0.00	0.00	0.00
	Interest Advanced					221,791.30	723,540.42	945,331.72
	TOTAL INTEREST					257,197.02	875,047.94	1,132,244.96


				Page 7 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	Collection Account Report for December 27, 2004 Distribution


	Collection Account Report


INTEREST - WITHDRAWALS						GROUP 2	GROUP 1	TOTAL
SPACE INTENTIONALLY LEFT BLANK


INTEREST - OTHER ACCOUNTS						GROUP 2	GROUP 1	TOTAL

	Prepayment Penalties					0.00	0.00	0.00



	TOTAL INTEREST OTHER ACCOUNTS					0.00	0.00	0.00


INTEREST - FEES						GROUP 2	GROUP 1	TOTAL

	Current Servicing Fees					1,187.11	7,462.01	8,649.12
	Trustee Fees					661.48	2,940.33	3,601.81
	PMI Fees					0.00	2,507.56	2,507.56
	Required Reserve Account Deposit Amount							0.00
	TOTAL INTEREST FEES					1,848.59	12,909.90	14,758.49


				Page 8 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	Credit Enhancement Report for December 27, 2004 Distribution


	Credit Enhancement Report


ACCOUNTS						GROUP 2	GROUP 1	TOTAL
SPACE INTENTIONALLY LEFT BLANK


INSURANCE						GROUP 2	GROUP 1	TOTAL
SPACE INTENTIONALLY LEFT BLANK


STRUCTURAL FEATURES						GROUP 2	GROUP 1	TOTAL
SPACE INTENTIONALLY LEFT BLANK


				Page 9 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	Collateral Report for December 27, 2004 Distribution


	Collateral Report


COLLATERAL						GROUP 2	GROUP 1	TOTAL
	Loan Count:
	*Original*					404	608	1012
	Prior					296	473	769
	Prefunding					-	-	-
	Scheduled Paid Offs					-	-	-
	Full Voluntary Prepayments					(10)	(11)	(21)
	Repurchases					-	(1)	(1)
	Liquidations					-	-	-
	Current					286	461	747

	*Principal Balance:*
	Original					61,261,881.66	223,508,055.49	284,769,937.15
	Prior					39,688,820.95	176,419,987.91	216,108,808.86
	Prefunding					-	-	-
	Scheduled Principal					(244,769.23)	(178,954.30)	(423,723.53)
	Partial and Full Voluntary Prepayments					(1,433,279.76)	(4,040,464.90)	(5,473,744.66)
	Repurchases					-	(266,028.29)	(266,028.29)
	Liquidations					-	-	-
	Current					38,010,771.96	171,934,540.42	209,945,312.38

PREFUNDING						GROUP 2	GROUP 1	TOTAL
SPACE INTENTIONALLY LEFT BLANK


	Group 1
	Group 2
Current Prin Balance by Groups (in millions of dollars)					Total Current Principal Balance (in millions of dollars)


				Page 10 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	Collateral Report for December 27, 2004 Distribution


	Collateral Report


CHARACTERISTICS						GROUP 2	GROUP 1	TOTAL

	Weighted Average Coupon Original					7.983576%	6.290179%	6.654475%
	Weighted Average Coupon Prior					8.001927%	6.212047%	6.548555%
	Weighted Average Coupon Current					7.993757%	6.204597%	6.533180%
	Weighted Average Months to Maturity Original					204	355	323
	Weighted Average Months to Maturity Prior					193	348	320
	Weighted Average Months to Maturity Current					191	347	319
	Weighted Avg Remaining Amortization Term Original					-	-	-
	Weighted Avg Remaining Amortization Term Prior					192	348	319
	Weighted Avg Remaining Amortization Term Current					190	347	318
	Weighted Average Seasoning Original					-	-	-
	Weighted Average Seasoning Prior					101.64	11.09	27.72
	Weighted Average Seasoning Current					102.56	12.09	28.47

Note: Original information refers to deal issue.


	Group 1
	Group 2
WAC by Groups					Total WAC


WARAT by Groups					Total WARAT


Note: Dates correspond to distribution dates.
				Page 11 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	Collateral Report for December 27, 2004 Distribution


	Collateral Report


ARM CHARACTERISTICS						GROUP 2	GROUP 1	TOTAL

	Weighted Average Margin Original
	Weighted Average Margin Prior
	Weighted Average Margin Current
	Weighted Average Max Rate Original
	Weighted Average Max Rate Prior
	Weighted Average Max Rate Current
	Weighted Average Min Rate Original
	Weighted Average Min Rate Prior
	Weighted Average Min Rate Current
	Weighted Average Cap Up Original
	Weighted Average Cap Up Prior
	Weighted Average Cap Up Current
	Weighted Average Cap Down Original
	Weighted Average Cap Down Prior
	Weighted Average Cap Down Current

Note: Original information refers to deal issue.

SERVICING FEES / ADVANCES						GROUP 2	GROUP 1	TOTAL

	Current Servicing Fees					1,187.11	7,462.01	8,649.12
	Delinquent Servicing Fees					7,188.62	37,131.16	44,319.78
	TOTAL SERVICING FEES					8,375.73	44,593.17	52,968.90

	Total Servicing Fees					8,375.73	44,593.17	52,968.90
	Compensating Interest					(1,298.34)	(3,004.49)	(4,302.83)
	Delinquent Servicing Fees					(7,188.62)	(37,131.16)	(44,319.78)
	COLLECTED SERVICING FEES					(111.23)	4,457.52	4,346.29

	Total Advanced Principal For Current Payment Date					219,752.49	152,069.75	371,822.24
	Total Advanced Interest For Current Payment Date					221,791.30	723,540.42	945,331.72
	TOTAL ADVANCES FOR CURRENT PERIOD					441,543.79	875,610.17	1,317,153.96


ADDITIONAL COLLATERAL INFORMATION						GROUP 2	GROUP 1	TOTAL

	Prepayment Interest Shortfall (PPIS)					1,298.34	3,004.49	4,302.83
	Compensating Interest					(1,298.34)	(3,004.49)	(4,302.83)
	Net Prepayment Interest Shortfall (Net PPIS)					0.00	0.00	0.00

	Weighted Average Net Mortgage Rate							6.205132%


				Page 12 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	Delinquency Report for December 27, 2004 Distribution


	Delinquency Report - Total


				<1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT		Balance		###########	5,428,139.45	2,767,039.03	379,535.83	8,574,714.31
		% Balance		80.99%	2.59%	1.32%	0.18%	4.08%
		# Loans		589	30	13	2	45
		% # Loans		78.85%	4.02%	1.74%	0.27%	6.02%
FORECLOSURE		Balance		-	200,994.70	-	1,356,776.45	1,557,771.15
		% Balance		0.00%	0.10%	0.00%	0.65%	0.74%
		# Loans		-	1	-	4	5
		% # Loans		0.00%	0.13%	0.00%	0.54%	0.67%
BANKRUPTCY		Balance		353,516.56	120,485.76	-	113,061.02	587,063.34
		% Balance		0.17%	0.06%	0.00%	0.05%	0.28%
		# Loans		2	2	-	1	5
		% # Loans		0.27%	0.27%	0.00%	0.13%	0.67%
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		353,516.56	5,749,619.91	2,767,039.03	1,849,373.30	10,719,548.80
		% Balance		0.17%	2.74%	1.32%	0.88%	5.11%
		# Loans		2	33	13	7	55
		% # Loans		0.27%	4.42%	1.74%	0.94%	7.36%
Note: <1 Payment = 1-30days, 1 Payment = 31-60days, 2 Payments = 61-90days, 3+ Payments = 91+
								6 Months Moving Average
1 or 2 Payments Delinquent					3 or More Payments Delinquent


Total Foreclosure					Total Bankruptcy and REO


Note: Dates correspond to distribution dates.
				Page 13 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	Delinquency Report for December 27, 2004 Distribution


	Delinquency Report - Group 1 Group


				<1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT		Balance		###########	2,385,461.74	2,175,134.40	-	4,560,596.14
		% Balance		81.87%	1.39%	1.27%	0.00%	2.65%
		# Loans		375	7	6	-	13
		% # Loans		81.34%	1.52%	1.30%	0.00%	2.82%
FORECLOSURE		Balance		-	-	-	1,082,869.71	1,082,869.71
		% Balance		0.00%	0.00%	0.00%	0.63%	0.63%
		# Loans		-	-	-	2	2
		% # Loans		0.00%	0.00%	0.00%	0.43%	0.43%
BANKRUPTCY		Balance		231,770.36	-	-	113,061.02	344,831.38
		% Balance		0.13%	0.00%	0.00%	0.07%	0.20%
		# Loans		1	-	-	1	2
		% # Loans		0.22%	0.00%	0.00%	0.22%	0.43%
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		231,770.36	2,385,461.74	2,175,134.40	1,195,930.73	5,988,297.23
		% Balance		0.13%	1.39%	1.27%	0.70%	3.48%
		# Loans		1	7	6	3	17
		% # Loans		0.22%	1.52%	1.30%	0.65%	3.69%
Note: <1 Payment = 1-30days, 1 Payment = 31-60days, 2 Payments = 61-90days, 3+ Payments = 91+
								6 Months Moving Average
1 or 2 Payments Delinquent					3 or More Payments Delinquent


Total Foreclosure					Total Bankruptcy and REO


Note: Dates correspond to distribution dates.
				Page 14 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	Delinquency Report for December 27, 2004 Distribution


	Delinquency Report - Group 2 Group


				<1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT		Balance		29,269,597.31	3,042,677.71	591,904.63	379,535.83	4,014,118.17
		% Balance		77.00%	8.00%	1.56%	1.00%	10.56%
		# Loans		214	23	7	2	32
		% # Loans		74.83%	8.04%	2.45%	0.70%	11.19%
FORECLOSURE		Balance		-	200,994.70	-	273,906.74	474,901.44
		% Balance		0.00%	0.53%	0.00%	0.72%	1.25%
		# Loans		-	1	-	2	3
		% # Loans		0.00%	0.35%	0.00%	0.70%	1.05%
BANKRUPTCY		Balance		121,746.20	120,485.76	-	-	242,231.96
		% Balance		0.32%	0.32%	0.00%	0.00%	0.64%
		# Loans		1	2	-	-	3
		% # Loans		0.35%	0.70%	0.00%	0.00%	1.05%
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		121,746.20	3,364,158.17	591,904.63	653,442.57	4,731,251.57
		% Balance		0.32%	8.85%	1.56%	1.72%	12.45%
		# Loans		1	26	7	4	38
		% # Loans		0.35%	9.09%	2.45%	1.40%	13.29%
Note: <1 Payment = 1-30days, 1 Payment = 31-60days, 2 Payments = 61-90days, 3+ Payments = 91+
								6 Months Moving Average
1 or 2 Payments Delinquent					3 or More Payments Delinquent


Total Foreclosure					Total Bankruptcy and REO


Note: Dates correspond to distribution dates.
				Page 15 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	REO Report for December 27, 2004 Distribution


	REO Report - Mortgage Loans that Become REO During Current Distribution


SUMMARY				LOAN GROUP

Total Loan Count = 0				Loan Group 1 = Group 1; REO Book Value = 000.00
Total Original Principal Balance = 000.00				Loan Group 2 = Group 2; REO Book Value = 000.00
Total Current Balance = 000.00
REO Book Value = 000.00

REO Book Value reported corresponds to total REO loans, including loans that become REO during current distribution.

Loan Number		Original	Stated		Current	State &
&		Principal	Principal	Paid to	Note	LTV at	Original	Origination
Loan Group		Balance	Balance	Date	Rate	Origination	Term	Date
SPACE INTENTIONALLY LEFT BLANK


				Page 16 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	Prepayment Report for December 27, 2004 Distribution


	Prepayment Report - Voluntary Prepayments


VOLUNTARY PREPAYMENTS						GROUP 2	GROUP 1	TOTAL

	*Current*
	Number of Paid in Full Loans					10	11	21
	Number of Repurchased Loans					-	1	1
	Total Number of Loans Prepaid in Full					10	12	22

	Paid in Full Balance					1,399,269.01	4,026,682.90	5,425,951.91
	Repurchased Loans Balance					-	266,028.29	266,028.29
	Curtailments Amount					34,010.75	13,782.00	47,792.75
	Total Prepayment Amount					1,433,279.76	4,306,493.19	5,739,772.95

	*Cumulative*
	Number of Paid in Full Loans					105	95	200
	Number of Repurchased Loans					28	37	65
	Total Number of Loans Prepaid in Full					133	132	265

	Paid in Full Balance					17,948,885.47	35,395,199.68	53,344,085.15
	Repurchased Loans Balance					2,612,032.21	14,190,060.63	16,802,092.84
	Curtailments Amount					236,996.86	180,150.09	417,146.95
	Total Prepayment Amount					20,797,914.54	49,765,410.40	70,563,324.94

SPACE INTENTIONALLY LEFT BLANK


Total Prepayments by Groups (in thousands of dollars)					Total Prepayments (in thousands of dollars)


				Page 17 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	Prepayment Report for December 27, 2004 Distribution


	Prepayment Report - Voluntary Prepayments


VOLUNTARY PREPAYMENT RATES						GROUP 2	GROUP 1	TOTAL

	SMM					3.63%	2.44%	2.66%
	3 Months Avg SMM					4.11%	3.98%	4.00%
	12 Months Avg SMM
	Avg SMM Since Cut-off					4.64%	2.78%	3.15%

	CPR					35.86%	25.69%	27.65%
	3 Months Avg CPR					39.56%	38.59%	38.76%
	12 Months Avg CPR
	Avg CPR Since Cut-off					43.48%	28.68%	31.90%

	PSA					597.73%	1062.56%	485.66%
	3 Months Avg PSA Approximation					659.29%	1740.90%	699.14%
	12 Months Avg PSA Approximation
	Avg PSA Since Cut-off Approximation					724.69%	605.27%	545.48%



	Group 1
	Group 2


CPR by Groups					Total CPR


PSA by Groups					Total PSA


				Page 18 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	Prepayment Report for December 27, 2004 Distribution


	Prepayment Report - Voluntary Prepayments

	Group 1
	Group 2

CPR Avg since Cut-Off by Groups					Total CPR Avg since Cut-Off


PSA Avg since Cut-Off by Groups					Total PSA Avg since Cut-Off


PREPAYMENT CALCULATION METHODOLOGY
Single Monthly Mortality (SMM): (Voluntary partial and full prepayments + Repurchases)/(Beg Principal Balance - Sched Principal)
Conditional Prepayment Rate (CPR): 1-((1-SMM)^12)
PSA Standard Prepayment Model: CPR/(0.02*min(30,WAS))
Average SMM over period between nth month and mth month (AvgSMMn,m): [(1-SMMn) * (1-SMMn+1) .......(1-SMMm)]^(1/months in period n,m)
Average CPR over period between the nth month and mth month (AvgCPRn,m): 1-((1-AvgSMMn,m)^12)
Average PSA Approximation over period between the nth month and mth month: AvgCPRn,m/(0.002*Avg WASn,m))
Average WASn,m: (min(30,WASn)+min(30,WASn+1)+.......+min(30,WASm)/(number of months in the period n,m)
Weighted Average Seasoning (WAS)

Note: Prepayment rates are calculated since deal issue date and include partial and full voluntary prepayments and repurchases.
Dates correspond to distribution dates.

				Page 19 of 27				© COPYRIGHT 2004 Deutsche Bank


	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	Prepayment Detail Report for December 27, 2004 Distribution


	Prepayment Detail Report - Loans Prepaid in Full During Current Distribution


SUMMARY						LOAN GROUP

Total Loan Count = 22						Loan Group 1 = Group 1
Total Original Principal Balance = 6,625,300.00						Loan Group 2 = Group 2
Total Prepayment Amount = 5,691,980.20


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

1471350 1			425,000.00	413,041.78	Nov-22-04	6.375%	TN - 61.06%	Paid Off - 360	Apr-12-02
2902871 1			136,000.00	134,580.47	Dec-08-04	7.500%	MD - 81.93%	Paid Off - 360	Sep-29-03
2932271 1			400,000.00	395,257.21	Nov-29-04	6.625%	CA - 72.07%	Paid Off - 360	Sep-02-03
3371415 1			322,700.00	319,608.96	Nov-30-04	5.750%	MN - 93.54%	Paid Off - 360	Feb-25-04
3417492 1			364,000.00	360,635.16	Nov-30-04	6.000%	CA - 80.00%	Paid Off - 360	Feb-25-04
3443877 1			120,000.00	119,136.50	Nov-16-04	6.625%	CA - 33.80%	Paid Off - 360	Feb-24-04
3447257 1			360,000.00	357,531.40	Nov-24-04	6.875%	MD - 80.00%	Paid Off - 360	Mar-05-04
3450029 1			403,750.00	400,742.77	Dec-01-04	7.625%	FL - 85.00%	Paid Off - 360	Feb-11-04
3462753 1			504,000.00	500,010.40	Dec-07-04	6.125%	MD - 70.00%	Paid Off - 360	Feb-24-04
3474564 1			671,200.00	662,391.60	Nov-19-04	6.000%	CA - 75.00%	Paid Off - 360	Mar-19-04
3561331 1			369,950.00	363,746.65	Nov-29-04	5.875%	AZ - 68.26%	Paid Off - 360	Mar-18-04
20212 2			330,000.00	1,334.77	Dec-01-04	7.500%	CA - 62.26%	Paid Off - 360	Sep-22-93
39376 2			345,000.00	288,406.14	Dec-08-04	7.000%	MN - 52.27%	Paid Off - 360	Dec-29-93
59055 2			387,500.00	45,428.09	Nov-18-04	7.000%	CA - 60.55%	Paid Off - 180	May-16-94
143141 2		BK	345,000.00	311,860.16	Nov-30-04	8.875%	CA - 75.00%	Paid Off - 360	Dec-08-95
156699 2			324,000.00	286,254.35	Nov-17-04	8.400%	CA - 80.00%	Paid Off - 360	Feb-05-96
212528 2			50,000.00	31,585.96	Dec-07-04	8.250%	NY - 19.23%	Paid Off - 180	Feb-25-97
248735 2			55,200.00	32,315.71	Dec-13-04	8.625%	AZ - 64.94%	Paid Off - 180	Jun-11-97
319617 2			56,000.00	38,414.04	Nov-22-04	7.500%	CA - 80.00%	Paid Off - 180	Mar-27-98
350055 2			50,500.00	47,077.21	Nov-18-04	8.250%	NY - 73.19%	Paid Off - 360	Sep-14-98
468697 2			337,500.00	316,592.58	Dec-07-04	7.375%	CA - 75.00%	Paid Off - 360	Apr-23-99
3281721 1			268,000.00	266,028.29	Nov-19-04	8.750%	NY - 94.96%	Repur/Subs - 360	Dec-31-03


					Page 20 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	Realized Loss Report for December 27, 2004 Distribution


	Realized Loss Report - Collateral


COLLATERAL REALIZED LOSSES						GROUP 2	GROUP 1	TOTAL

	*Current*
	Number of Loans Liquidated					-	-	-
	Collateral Realized Loss/(Gain) Amount					-	-	-
	Net Liquidation Proceeds					-	-	-

	*Cumulative*
	Number of Loans Liquidated					-	-	-
	Collateral Realized Loss/(Gain) Amount					-	-	-
	Net Liquidation Proceeds					-	-	-

	Note: Collateral Realized Loss Amount may include adjustments to loans liquidated in prior periods.


	Current Realized Losses					0.00	0.00	0.00
	Supplemental Losses (Recoveries)					0.00	0.00	0.00
	Current Net Realized Losses (Recoveries)					0.00	0.00	0.00

	Prior Cumulative Realized Loss					0.00	0.00	0.00
	Current Net Realized Loss (Recoveries)					0.00	0.00	0.00
	Current Cumulative Realized Loss					0.00	0.00	0.00

	Current Special Hazard Loss Coverage Amount					1,192,246.26	2,511,341.00	3,703,587.26
	Current Fraud Loss Coverage Amount					600,000.00	2,250,000.00	2,850,000.00
	Current Bankruptcy Loss Coverage Amount					100,000.00	100,000.00	200,000.00

	Class 1-B-1 Write Down Amount							0.00
	Class 1-B-2 Write Down Amount							0.00
	Class 1-B-3 Write Down Amount							0.00
	Class 1-B-4 Write Down Amount							0.00
	Class 1-B-5 Write Down Amount							0.00
	Class1-B-6 Write Down Amount							0.00
	Class 2-B-1 Write Down Amount							0.00
	Class 2-B-2 Write Down Amount							0.00
	Class 2-B-3 Write Down Amount							0.00
	Class 2-B-4 Write Down Amount							0.00

	Group 1						3 Months Moving Average
	Group 2

Collateral Loss Severity Approximation by Groups					Collateral Loss Severity Approximation


				Page 21 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	Realized Loss Report for December 27, 2004 Distribution


	Realized Loss Report - Collateral


DEFAULT SPEEDS						GROUP 2	GROUP 1	TOTAL

	MDR					0.00%	0.00%	0.00%
	3 Months Avg MDR					0.00%	0.00%	0.00%
	12 Months Avg MDR
	Avg MDR Since Cut-off					0.00%	0.00%	0.00%

	CDR					0.00%	0.00%	0.00%
	3 Months Avg CDR					0.00%	0.00%	0.00%
	12 Months Avg CDR
	Avg CDR Since Cut-off					0.00%	0.00%	0.00%

	SDA					0.00%	0.00%	0.00%
	3 Months Avg SDA Approximation					0.00%	0.00%	0.00%
	12 Months Avg SDA Approximation
	Avg SDA Since Cut-off Approximation					0.00%	0.00%	0.00%

	Loss Severity Approximation for Current Period
	3 Months Avg Loss Severity Approximation
	12 Months Avg Loss Severity Approximation
	Avg Loss Severity Approximation Since Cut-off

	Group 1
	Group 2
CDR by Groups					Total CDR


SDA by Groups					Total SDA


				Page 22 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	Realized Loss Report for December 27, 2004 Distribution


	Realized Loss Report - Collateral

	Group 1
	Group 2

CDR Avg since Cut-Off by Groups					Total CDR Avg since Cut-Off


SDA Avg since Cut-Off by Groups					Total SDA Avg since Cut-Off


COLLATERAL REALIZED LOSS CALCULATION METHODOLOGY
Monthly Default Rate (MDR): (Beg Principal Balance of Liquidated Loans)/(Total Beg Principal Balance)
Conditional Default Rate (CDR): 1-((1-MDR)^12)
SDA Standard Default Assumption: CDR/IF(WAS<61,MIN(30,WAS)0.02,MAX(0.03,MIN(30,WAS)0.02-0.0095*(WAS-60)))
Average MDR over period between nth month and mth month (AvgMDRn,m): [(1-MDRn) * (1-MDRn+1) .......(1-MDRm)]^(1/months in period n,m)
Average CDR over period between the nth month and mth month (AvgCDRn,m): 1-((1-AvgMDRn,m)^12)
Average SDA Approximation over period between the nth month and mth month:
AvgCDRn,m/IF(Avg WASn,m<61,MIN(30,Avg WASn,m)0.02,MAX(0.03,MIN(30,Avg WASn,m)0.02-0.0095*(Avg WASn,m-60)))
Average WASn,m: (WASn + WASn+1 +.......+ WASm )/(number of months in the period n,m)
Loss Severity Approximation for current period: sum(Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans)
Average Loss Severity Approximation over period between nth month and mth month: Avg(Loss Severityn,m)
Note: Default rates are calculated since deal issue date and include realized gains and additional realized losses and gains from prior periods.
Dates correspond to distribution dates.

				Page 23 of 27				© COPYRIGHT 2004 Deutsche Bank


	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	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 Revisions = 0						Loan Group 1 = Group 1
Total Prior Principal Balance = 0.00						Loan Group 2 = Group 2
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 24 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	Triggers, Adj. Rate Cert. and Miscellaneous Report for December 27, 2004 Distribution


	Triggers, Adj. Rate Cert. and Miscellaneous Report


TRIGGER EVENTS						GROUP 2	GROUP 1	TOTAL

	Has the Optional Termination Date been reached?							No

	Have the Sr. Prepay Step Down Cond been satisfied?					No	No

	Has the Sr. Credit Supp. Depletion Date been reached?					No	No

	Has the Spec. Haz. Coverage Term Date been reached?					No	No

	Has the Fraud LossCoverage Term. Date been reached?					No	No

	Has the Bank LossCoverage Term. Date been reached?					No	No


ADJUSTABLE RATE CERTIFICATE INFORMATION						GROUP 2	GROUP 1	TOTAL
SPACE INTENTIONALLY LEFT BLANK


ADDITIONAL INFORMATION						GROUP 2	GROUP 1	TOTAL

	Current Senior Percentage					96.508728%	94.705048%
	Next Senior Percentage					96.377082%	94.580054%
	Current Subordinate Percentage					3.491272%	5.294952%
	Next Subordinate Percentage					3.622918%	5.419946%
	Current Senior Prepayment Percentage					100.000000%	100.000000%
	Current Subordinated Prepayment Percentage					0.000000%	0.000000%

	Next Projected Pass-Through Rate for Class 1-A-3							2.580630%
	Next Projected Pass-Through Rate for Class 1-A-4							5.419370%
	Next Projected Pass-Through Rate for Class 2-A-1							2.730630%
	Next Projected Pass-Through Rate for Class 2-A-2							4.996456%
	Next Projected Pass-Through Rate for Class 1-A-X							0.487752%
	Next Projected Pass-Through Rate for Class 2-B-X							2.227086%
	Next Projected Pass-Through Rate for all other classes							5.500000%

				Page 25 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	Other Related Information for December 27, 2004 Distribution


	Other Related Information


ADDITIONAL INFORMATION						GROUP 2	GROUP 1	TOTAL

	Scheduled Principal
	1 Month Prior							423,723.53
	2 Months Prior							433,544.20
	3 Months Prior							445,188.91
	4 Months Prior							457,100.26
	5 Months Prior							472,601.78
	6 Months Prior							486,036.00
	7 Months Prior							496,472.65
	8 Months Prior							510,195.44
	9 Months Prior							536,437.06
	10 Months Prior							0.00
	11 Months Prior							0.00
	12 Months Prior							0.00



	Scheduled Principal on 60+ Day Delinquent Loans
	1 Month Prior							3,824.77
	2 Months Prior							2,922.32
	3 Months Prior							6,043.82
	4 Months Prior							3,722.21
	5 Months Prior							5,792.70
	6 Months Prior							3,863.42
	7 Months Prior							2,693.23
	8 Months Prior							3,350.44
	9 Months Prior							0.00
	10 Months Prior							0.00
	11 Months Prior							0.00
	12 Months Prior							0.00


				Page 26 of 27				© COPYRIGHT 2004 Deutsche Bank
	IndyMac Residential Asset Securitization Trust 2004-A2
	Mortgage Pass-Through Certificates

	Additional Certificate Report for December 27, 2004 Distribution


	Additional Certificate Report


	CLASS				Net PPIS & Relief Act Shortfall Allocation	Unpaid Interest Amount Due	Unpaid Interest Paid	Remaining Unpaid Interest Amount

	1-A-1				0.00	0.00	0.00	0.00
	1-A-2				0.00	0.00	0.00	0.00
	1-A-3				0.00	0.00	0.00	0.00
	1-A-4				0.00	0.00	0.00	0.00
	1-A-5				0.00	0.00	0.00	0.00
	1-A-6				0.00	0.00	0.00	0.00
	1-A-7				0.00	0.00	0.00	0.00
	1-A-8				0.00	0.00	0.00	0.00
	1-A-9				0.00	0.00	0.00	0.00
	P				0.00	0.00	0.00	0.00
	A-R				0.00	0.00	0.00	0.00
	1-PO				0.00	0.00	0.00	0.00
	1-B-1				0.00	0.00	0.00	0.00
	1-B-2				0.00	0.00	0.00	0.00
	1-B-3				0.00	0.00	0.00	0.00
	1-B-4				0.00	0.00	0.00	0.00
	1-B-5				0.00	0.00	0.00	0.00
	1-B-6				0.00	0.00	0.00	0.00


				Page 27 of 27				© COPYRIGHT 2004 Deutsche Bank

INDYMAC MBS INC RESIDENTIAL ASSET SEC TRUST 2004 A2 8-K