Fitch Affirms SLM 2006-4 Notes

NEW YORK--()--Fitch Ratings has affirmed the senior notes for SLM Student Loan Trust 2006-4 at 'AAAsf' and the subordinate notes at 'Asf'. The Rating Outlook remains Stable for all classes.

KEY RATING DRIVERS

High Collateral Quality: The trust collateral consists of 100% of Federal Family Education Loan Program (FFELP) loans. The credit quality of the trust collateral is high, in Fitch's opinion, based on the guarantees provided by the transaction's eligible guarantors and reinsurance provided by the U.S. Department of Education (ED) for at least 97% of principal and accrued interest. Fitch currently rates the U.S. sovereign at 'AAA' with a Stable Outlook.

Sufficient Credit Enhancement: While both the senior and subordinate notes will benefit from future excess spread, the senior notes also benefit from subordination provided by the class B note. As of March 2014, total parity is 100.00% and senior parity is 104.75% (4.53% CE). Excess cash is being released from the trust as the total parity maintains at 100%.

Adequate Liquidity Support: Liquidity support is provided by a reserve account. The reserve is sized equal to the greater of 0.25% of the pool balance, and $3,769,627.

Acceptable Servicing Capabilities: Navient Solutions, Inc. (formerly known as Sallie Mae, Inc.), as servicer, will be responsible for servicing the portfolio. Fitch has reviewed the servicing operations of Navient Solutions and believes it to be acceptable servicer of FFELP student loans.

Class A-6B benefits from a currency swap with Credit Suisse

(rated 'A/'F1' with a Stable Outlook by Fitch) and BNP Paribas (rated 'A+/'F1' with a Stable Outlook). Fitch considers Credit Suisse and BNP Paribas an acceptable counterparty for this deal.

RATING SENSITIVITIES

Since FFELP student loan ABS rely on the U.S. government to reimburse defaults, 'AAAsf' FFELP ABS ratings will likely move in tandem with the 'AAA' U.S. sovereign rating. Aside from the U.S. sovereign rating, defaults and basis risk account for the majority of the risk embedded in FFELP student loan transactions. Additional defaults and basis shock beyond Fitch's published stresses could result in future downgrades. Likewise, a buildup of credit enhancement driven by positive excess spread given favorable basis factor conditions could lead to future upgrades.

Fitch has affirmed the following:

SLM Student Loan Trust Series 2006-4:

--Class A-4 at 'AAAsf'; Outlook Stable;

--Class A-5 at 'AAAsf'; Outlook Stable;

--Class A-6 at 'AAAsf'; Outlook Stable;

--Class B at 'Asf'; Outlook Stable.

Additional information is available at 'www.fitchratings.com'.

Applicable Criteria and Related Research:

--'Global Structured Finance Rating Criteria' (May 20, 2014);

--'Rating U.S. Federal Family Education Loan Program Student Loan ABS Criteria' (June 23, 2014).

Applicable Criteria and Related Research:

Global Structured Finance Rating Criteria

http://www.fitchratings.com/creditdesk/reports/report_frame.cfm?rpt_id=748821

Rating U.S. Federal Family Education Loan Program Student Loan ABS Criteria

http://www.fitchratings.com/creditdesk/reports/report_frame.cfm?rpt_id=750530

Additional Disclosure

Solicitation Status

http://www.fitchratings.com/gws/en/disclosure/solicitation?pr_id=840940

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Contacts

Fitch Ratings
Primary Analyst
Lisette Figueroa
Analyst
+1-212-908-1836
Fitch Ratings, Inc.
33 Whitehall St.
New York, NY 10004
or
Committee Chairperson
Tracy Wan
Senior Director
+1-212-908-9171
or
Media Relations
Sandro Scenga, +1-212-908-0278
sandro.scenga@fitchratings.com

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Contacts

Fitch Ratings
Primary Analyst
Lisette Figueroa
Analyst
+1-212-908-1836
Fitch Ratings, Inc.
33 Whitehall St.
New York, NY 10004
or
Committee Chairperson
Tracy Wan
Senior Director
+1-212-908-9171
or
Media Relations
Sandro Scenga, +1-212-908-0278
sandro.scenga@fitchratings.com