MOUR Portfolio Constant Prepayment Rates ("CPR") 25 in 15 10 8.6 5 0 re -CP 4 9 If %es Nes / / & 0 & & 0 CP 5(4 6r4 1,6 14.5 Monthly Portfolio Constant Prepayment Rate Prior Quarters I 1 114 Current Months 5 10 20 I 15 April 2012 Agency Asset Class CPR 11.6 151 3.9 99 0 ARAM