9:45 AM ET 09/02/10 - MBS prices are down -4/32 (FNMA 30-yr 4.0 at 103.04), which is about 10/32 lower than yesterday at this time. Unfavorable repricing took place yesterday. The 30-yr fixed FNMA required net yield (60 day) is now at 3.80%, from 3.73% yesterday. This morning, weekly Jobless Claims ...