It's a bit early at this point, based on MBS prices alone, but reprice risk could increase if MBS take a cue from Treasuries. The latter just spiked relatively fiercely (relative being the key word) after the 3pm CME close.
Post-3pm volatility is to be expected on the last trading day of Mar, Jun, Sep, and Dec. If it continues from here, risks could increase. Otherwise, MBS are outperforming sufficiently to avoid reprices for now.
