This alert only really applies to lenders who issued positive reprices earlier today. Any other lender is only seeing a modest drop in prices from rate sheet print times--if any.
5.5 UMBS are down 5 ticks (.16) from the mid day highs seen between 12:40 and 2:00pm ET. Rate sheets that came out during that window are at a higher risk of reprices.
10yr yields are still down 3.6bps on the day at 4.338, but that's up just over 2bps from the lows of the day.
All in all, nothing too dramatic, but negative reprice risk can't be ruled out completely.