Boston Fed arch-dove Rosengren is drawing the battle lines for next week’s FOMC meeting.

The Fed is already buying $40B/month in MBS. Earlier Bullard talked about $25B more per month for Treasury buys.

Rosengren is talking about an additional $45B but says more MBS may be preferable to Treasuries.

A few people at the Fed seem to think they’re directly responsible for the recent better housing numbers.