After opening the day lower yesterday, MBS managed to rally steadily off the lows before a late day stock sell off added steam to the upward price momentum, which resulted in a few lenders repricing for the better by day's end. Several factors contributed to the late day price spike. The findings of the Fed's Beige Book painted an uncertain economic picture, then Wells Fargo was downgraded from 'hold' to 'sell' by a prominent analyst. These two events combined to knock the wind out of the stock market, which resulted in a rally in the benchmark debt and MBS market. Unfortunately the early morning weakness has forced most lenders to take back yesterday's rate sheet gains....