6.40% Junior Subordinated Debenture (AGUS)

Security

Assured Guaranty US Holdings Inc. 6.4% $150MM Series A Enhanced Junior Subordinated Debentures due 2103

CUSIP:  04622DAA9

Ticker:  N/A

Corporate issuer:  Assured Guaranty US Holdings Inc.

Guaranteed by:  Assured Guaranty Ltd. (on a junior subordinated basis)

Par/denomination:  $1000

Coupon or dividend rate:  $64 per $1000

                       6.40% per annum (until 12/15/2016; quarterly reset floating rate of 3 month LIBOR plus 2.38% after)

Coupon or dividend record date:  close of business on the business day preceding interest payment date (June 14 and Dec 14 for 2011)

                       payable date:  June 15 and Dec 15

                       ex-date (if any):  N/A

Issue date:  12/20/2006

Maturity:  12/15/2066

Call date/terms:  N/A

Prospectus (pdf)

Please note information in the prospectus or prospectus supplement is current only as of the date of the document; for more current information, please see Financial Information for Assured Guaranty Ltd. and AGM or AGC, as applicable, and Assured Guaranty’s filings with the Securities and Exchange Commission.