NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS OF AEGON N.V.  NOTE 4 134 SSNR   1 SNR   2 MEZZ   3 SSUP   4 Total  amortized cost Total fair value GSE guaranteed – 1,464   –  – 1,464 1,487 Prime Jumbo 222 256 21 17 516 404 Alt-A 586 272 3 1 862 667 Negative amortization fl oaters 1,273 26 7 56 1,362 722 Reverse mortgage fl oaters  – 350   –  – 350 292 AT DECEMBER 31, 2009 2,081 2,368 31 74 4,554 3,572 Of which insured – 1 – 43 44 8 1  SSNR – super senior 2  SNR – senior 3  MEZZ – mezzanine 4  SSUP – senior support AEGON USA’s RMBS exposure includes exposure to securitized  home equity loans (Alt-A positions). This portfolio totals  EUR 701 million at December 31, 2010 (2009: EUR 667 million).  Net unrealized losses amount to EUR 28 million at December 31,  2010 (2009: EUR 195 million). Alt-A loans are made to  borrowers whose qualifying mortgage characteristics do not  meet the standard underwriting criteria established by the  GSEs. The typical Alt-A borrower has a credit score high enough  to obtain an ’A‘ standing, which is especially important since the  score must compensate for the lack of other necessary  documentation related to borrower income and / or assets.  AEGON’s investments in Alt-A mortgages are in the form of  mortgage backed securities. AEGON's Alt-A investments are  primarily backed by loans with fixed interest rates for the  entire term of the loan. The tables below summarize the credit  quality of the underlying loans backing the securities and the  vintage year.  2010 2009 Vintage Amortized  cost  %  Amortized  cost  %  Prior 2005 76 10.4% 69 8.0% 2005 108 14.8% 131 15.2% 2006 163 22.4% 187 21.7% 2007 265 36.4% 324 37.6% 2008 117 16.0% 151 17.5% AT DECEMBER 31 729 100.0% 862 100.0% 2010 2009 Rating Amortized  cost  %  Amortized  cost  %  AAA 71 9.7% 151 17.5% AA 12 1.7% 12 1.4% A – – 17 2.0% BBB 27 3.7% – – <BBB 619 84.9% 682 79.1% AT DECEMBER 31 729 100.0% 862 100.0% Alt-A Mortgage Exposure