GLOBAL MARKETS-Yellen's case for rate hike boosts dollar; stocks surrender gains
August 26, 2016 at 12:15 PM EDT
NEW YORK, Aug 26 (Reuters) - U.S. equities gave up early gains on Friday, hurt by a surging U.S. dollar after Federal Reserve Chair Janet Yellen said that the case for raising U.S. interest rates has strengthened in recent months.