U.S. markets are giving up early gains on Wednesday following this morning's report which showed the economy is bouncing back faster than estimated. The major markets are now mixed with just the Nasdaq showing small gains. The Commerce Department reported GDP grew 4% in the second quarter, but that may be fueling speculation that the Fed might raise rates sooner than expected. The Fed Reserve will announce the outcome of their meeting on monetary policy at 2 pm ET. Twitter (TWTR) is having its biggest one-day advance ever. The stock is moving higher on heavy volume after reporting better than expected earnings and an increase in monthly active users. Buffalo Wild Wings (BWLD) is down nearly 14%, despite delivering what seemed to be solid earnings on Tuesday after the closing bell. Sodastream (SODA) is higher despite lowering its guidance on reports the Israel-based company is in talks to be taken private. TheStreet's Susannah Lee reports from Wall Street.