The Euro just spiked back to 1.104 after being as low as 1.092 early today. That's a big move for Euros and it's dragging Treasury yields quickly higher. There are rumors circulating about a new Greek deal, but details are sketchy.
Either way, 10yr yields are back up to 2.26 and Fannie 3.5s are back to +0-01 on the day. That's more than a quarter point lower than most lenders' rate sheet print times, making negative reprices likely in most cases.