U.S. equities index futures were almost unchanged on Friday as market participants are waiting for the GDP numbers fpr the world’s largest economy to be released later today. Investors are expecting more stimulus measures to be announced by the Fed if the figures disappoint.  At the same time Facebook Inc. shares are expected to open sharply lower as the social media giant released unsatisfactory earning results yesterday. Futures on the Dow Jones Industrial Average added 25 points to 12,850.3, while S&P 500 Index futures advanced 1.9 points to 1,356.70. Nasdaq-100 futures climberd 6.5 points to 2,579.