Credit default swap indices compiled by Fitch Solutions show subprime RMBS prices have continued to strengthen with some variation by vintage.

Month-over-month, subprime RMBS overall were up 7% as of April 1. The 2006 vintage, which was up 15%, reached a high not seen since December 2008 in the most recent month. The 2004 vintage was up 9% and the 2005 vintage was up 6%.

The relatively weak 2007 vintage, which managed to gain 4% during the market, was still at its third-lowest-ever value.

Fitch Solutions' loan-level analysis shows the constant default rate for all vintages dropped during the period. In addition, the constant prepayment rate fell across the board.

"While refinancing remains challenging for subprime assets, the general drop in default rates is an encouraging sign," said Fitch Solutions managing director Thomas Aubrey.

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