Fitch Ratings has taken the following rating action on one UBS Mortgage Asset Securitization Transaction (MASTR) Asset-Backed Securities (MABS) Net Interest Margin (NIM) note:
MABS NIM Trust 2005-OPT1
-$5.8 million class A notes withdrawn.
Underlying Transaction: MASTR ABS 2005-OPT1
The rating of class A reflects the financial guarantee provided by Ambac Assurance Corp., which is not rated by Fitch.
-‘Fitch Withdraws Ratings on MBIA and Ambac’ (26 June 2008).
L.D.