Wall Street stocks opened lower on Monday, with the Dow Jones Industrial Average falling 294 points, or 0.6%, to 53,266; the S&P 500 dropping 32 points, or 0.4%, to 7,680; and the Nasdaq Composite declining 102 points, or 0.4%, to 26,300. Overnight military developments in the Middle East rattled markets after the U.S. struck Iranian rocket launchers, and Iran stated it launched missiles at a U.S. airbase in Jordan. Meanwhile, Federal Reserve Chairman Warsh adopted a more hawkish stance on inflation at the Jackson Hole Economic Symposium, prompting markets to increase bets on interest rate hikes, putting pressure on equities.