Stocks dropped Thursday after U.S. oil prices topped $100 a barrel, amid growing fears of higher inflation from a prolonged war in the Middle East. The Dow Jones Industrial Average dropped 315 points, or 0.6%. The S&P 500 fell 0.5%, while the Nasdaq Composite slid 0.5% too. Higher oil prices continued to weigh on sentiment, as the war between the U.S. and Iran stretched into a seventh month. U.S. West Texas Intermediate futures for October jumped above $100 per barrel. Futures for the international benchmark Brent crude for November delivery spiked above $105 a barrel. The jump in oil prices...