to record issuance of bonds, payment of interest, and amortization of premium — учитывать выпуск облигаций, выплату процентов и амортизацию премии
yield on average agency earning assets after amortization of premium — рентабельность среднего доходного актива агентства после амортизации премии
During the quarter ended December 31, 2007 and relative to average Agency MBS earning assets, interest income earned was 5.77%, amortization of premium was (0.32)% and the average cost of funds was 4.89%, resulting in an interest rate spread of 0.56%.