How much of the $1.25

[CA renter]

How much of the $1.25 trillion in MBS on the Federal Reserve balance sheet is marked to market?

http://www.newyorkfed.org/markets/mbs_faq.html

edit: According to the most recent information I could find, it is just below a trillion at the moment, though recent trend changes are up.

http://research.stlouisfed.org/fred2/series/WMBSEC

http://timeline.stlouisfed.org/index.cfm?p=data&rd_id=39