Healthcare limits stock gains; oil prices drop on weak demand forecast

NEW YORK (Reuters) - A broad index of stocks around the world pared gains slightly on Thursday as healthcare shares limited Wall Street's rise, while oil prices turned lower on a forecast for weaker demand.The U.S. benchmark S&P 500 stock index was little changed. Shares of pharmaceutical companies fell after the administration of U.S. President Donald Trump withdrew a rule that would have required health insurers to pass on rebates from drugmakers. Conversely, financial shares rose as bond..