Stock futures add to gains after better than expected GDP data

|By:, SA News Editor

Stocks are set for a strong open after the latest GDP report showed the U.S. economy growing much faster than expected 4% during Q2, outweighing a smaller than expected gain in private-sector jobs during July; Dow +0.3%, S&P +0.4%, Nasdaq +0.6%.

Tech stocks look ready to rumble after Twitter's Q2 results crushed Wall Street forecasts; TWTR +23% in heavy premarket volume.

Amgen is expected to underpin the biotech space after reporting better than expected results.

The economic news has sparked some selling in the Treasury market, where the 10-year note is lower by 13 ticks with its yield up 5 bps at 2.51%.

Still ahead: EIA petroleum inventories, FOMC announcement.