NEW YORK :Global stocks dropped for a third straight session on Monday as the recent bout of elevated U.S. Treasury yields prompted profit-taking at the end of a strong year for equities. On Wall Street, all three major U.S. indexes were broadly lower but off earlier lows, with energy the only gainer among the 11 major S&P 500 sectors. The benchmark 10-year U.S. Treasury yield's recent push above the 4.5 per cent mark after the Federal Reserve on Dec. 18 signaled that it would take a slower