Here come the trackers
Quite a hefty drop from yesterday's 2.3%. It's taken the advance goods numbers from earlier into account.
"The final GDPNow model forecast for real GDP growth (seasonally adjusted annual rate) in the second quarter of 2016 is 1.8 percent on July 28, down from 2.3 percent on July 27. After the U.S. Census Bureau's inaugural release of its advance economic indicators report, which covers retail and wholesale inventories and foreign trade in goods, the nowcast of the contribution of net exports to second-quarter real GDP growth declined from 0.17 percentage points to -0.10 percentage points and the nowcast of the contribution of inventory investment to growth declined from -0.63 percentage points to -0.79 percentage points."
Barclays has done the same too but their tracker hasn't had such a wobble. They actually upped theirs to 2.4% vs 2.3% after the data.