As investors realized the GDP beat was fueled primarily by a massive increase in inventories due to tariffs (actually, they already realized that would happen, just not how big the inventory build would be), bonds stabilized earlier this morning and returned to pre-GDP levels.  

The 10am Consumer Sentiment data proved problematic for stocks, which began to tank shortly thereafter.  Bonds have been fairly predisposed to follow such sell-offs and today is no exception.

10yr yields are down nearly 6bps at 3.068% (almost back to October's lows).  Fannie 4.0 MBS are up a quarter point at 100-13 (100.41).