MBS are at the lows of the morning with 2.5 coupons down almost an eighth and 2.0 coupons just over an eighth.  This is typically the threshold of negative reprice risk, but it's early enough in the morning that not every lender is out with rates yet.  Of those who are, most of them won't view this is as enough weakness for reprices.  

10yr yields are still close to unchanged on the day, up 0.4bps at .689, but this is pushing intraday highs.