Fitch Rates $959.9MM Citigroup Mortgage Loan Trust, Series 2005-OPT4.

NEW YORK -- Fitch has rated the Citigroup Mortgage Loan Trust Inc., asset-backed pass-through certificates, series 2005-OPT4, which closed on Sept. 9, 2005, as follows:

-- $759.14 million classes A1 and A-2A through A-2D 'AAA';

-- $34.99 million class M-1 'AA+';

-- $31.11 million class M-2 'AA+';

-- $18.47 million class M-3 'AA';

-- $16.52 million class M-4 'AA-';

-- $14.58 million class M-5 'A+';

-- $14.58 million class M-6 'A';

-- $12.15 million class M-7 'A-';

-- $10.69 million class M-8 'BBB+';

-- $7.78 million class M-9 'BBB';

-- $7.29 million class M-10 'BBB';

-- $9.72 million class M-11 'BBB-';

-- $13.12 million privately offered class M-12 'BB+';

-- $9.72 million privately offered class M-13 'BB'.

The 'AAA' rating on the senior certificates reflects the 21.90% total credit enhancement provided by the 3.60% class M-1, the 3.20% class M-2, the 1.90% class M-3, the 1.70% class M-4, the 1.50% class M-5, the 1.50% class M-6, the 1.25% class M-7, the 1.10% class M-8, the 0.80% M-9, the 0.75% class M-10, the 1.00% class M-11, the 1.35% privately offered class M-12, the 1.00% privately offered class M-13, and the initial and target overcollateralization (OC) of 1.25%. All certificates have the benefit of monthly excess cash flow to absorb losses. In addition, the ratings reflect the quality of the loans, the integrity of the transaction's legal structure as well as the capabilities of Option One Mortgage Corp. as servicer and Wells Fargo Bank, N.A., as trustee.

The certificates are supported by two collateral groups. The Group I mortgage pool consists of fixed and adjustable-rate mortgage loans with principal balances that conform to Freddie Mac loan limits and have a cut-off date pool balance of $390,587,301. Approximately 17.65% of the mortgage loans are fixed-rate and 82.35% are adjustable-rate mortgage loans. The weighted average current loan rate is approximately 7.330%. The weighted average remaining term to maturity is 354 months. The average principal balance of the loans equals $157,115. The weighted average combined loan-to-value (CLTV) ratio is 81.58%. The properties are primarily located in California (15.50%), New York (9.40%) and Florida (9.12%).

The Group II mortgage pool consists of fixed and adjustable-rate mortgage loans with principal balances that may or may not conform to Freddie Mac loan limits and have a cut-off date pool balance of $581,423,165. Approximately 15.27% of the mortgage loans are fixed-rate and 84.73% are adjustable-rate mortgage loans. The weighted average current loan rate is approximately 7.328%. The weighted average remaining term to maturity is 355 months. The average principal balance of the loans equals $209,220. The weighted average CLTV ratio is 81.69%. The properties are primarily located in California (24.69%), New York (10.13%) and Florida (9.95%).

For federal income tax purposes, multiple real estate mortgage investment conduit (REMIC) elections will be made with respect to the trust estate.

Option One was incorporated in 1992, and began originating and servicing subprime loans in February 1993. Option One is a subsidiary of Block Financial, which is in turn a subsidiary of H & R Block, Inc.

Fitch's rating definitions and the terms of use of such ratings are available on the agency's public site, www.fitchratings.com. Published ratings, criteria and methodologies are available from this site, at all times. Fitch's code of conduct, confidentiality, conflicts of interest, affiliate firewall, compliance and other relevant policies and procedures are also available from the 'Code of Conduct' section of this site.