Compared to the MBS price highs seen after 9am ET this morning, we're currently down 6 ticks or 0.19. 

This would normally be more than enough to see a few negative reprices, but there are two other considerations.

1. Lenders were more conservative than normal due to the big AM sell-off.

2. It's not always the highs that matter as much as where prices were when an individual lender generates their first rate sheet (and those prices were a few ticks below the highs).

Still, best-case scenario, lenders are seeing at least an eighth of a point of weakness. As such, negative reprices can't be ruled out even if they're slightly less likely than a normal day with an eighth of a point of weakness.