Treasury's have decided to turn negative on the day, pulling MBS down further.  The 10 yr tsy is leading the pack to the downside at the moment, and MBS are off nearly another half point.

Here are current charts:

If it even still matters to anyone in light of the 14 tick loss on the day, here is the markup on the auction results.  We're currently at 2.304 on the 5 yr, just about 1 basis point away from the auction's high yield.