If you've been holding out in hopes of a reprice for the better, the "rate sheet influential" FN 4.5 MBS coupon is just off its highest prices/lowest yields of the day and one major lender and a few mid-majors just repriced for the better.

The secondary market current coupon, essentially the yield used to determine base mortgage pricing after g-fees and servicing, is 4.441%. This is about 4 basis lower than yesterday's 5pm "going out" marks.

If your finger is on the "ACCEPT LOCK" button, hold out on locking at least until later this afternoon.