The Federal Open Market Committee this week voted to scale back the central bank’s purchases of agency MBS again, dropping the monthly growth target to $25 billion, but the deceleration is barely keeping even with the rapid slowdown in new MBS issuance. At its December meeting, the FOMC decided to drop its MBS purchases to a pace that would add $35 billion per month, and lowered that by another $5 billion at its January meeting. The program began in late 2012 at $40 billion a month. The central bank will continue to reinvest principal and interest payments on its holdings in the agency MBS market. The most recent available data show...[Includes two data charts]