Rate sheet influential mortgage-backs are experiencing some localized weakness as stocks rally and swaps spreads widen. Nominally, yield spreads have been wider all morning but price levels were still pushing new records because Treasuries were catching a bid, but the poo hit the fan a few minutes ago and prices plummeted. We're still in the green though...just off the session highs.

The September FNCL 4.0 is +0-03 at 101+30. The FNCL 4.5 is UNCH at 104-02. The secondary market current coupon is -1.6bps at 3.679. Yield spreads are at the wides of the week.

After much rallying, agency MBS appear exhausted, but I doubt this will last long. Buyers have consistently jumped on any sign of weakness...unfortunately I've already seen a few reprices for the worse.