NEW YORK — Stocks fell on Wall Street Wednesday as the price of crude oil rose above $100 a barrel amid further escalation in the U.S. war with Iran. The S&P 500 index fell 0.3 percent. The Dow Jones Industrial Average fell 407 points, or 0.8 percent, as of 9:52 a.m. Eastern time. The Nasdaq composite fell 0.4 percent. The losses were broad, with retailers among the companies leading the market lower. Amazon fell 1.9 percent and Starbucks fell 1.5 percent. Nearly every sector within the benchmark S&P 500 lost ground, but oil companies pushed higher. Exxon Mobil rose 2.5 percent and Chevron rose 2.3 percent. Oil prices drove much of the action on Wall Street. The U.S. destroyed five Iranian tankers on Tuesday in a series of attacks between the two nations. The conflict that began in February has essentially shut down traffic in the vital Strait of Hormuz, where a fifth of the world’s oil supply passed before the war began. The price of Brent crude, the international standard, rose 2.8 percent to $100.62 a barrel. It marks the first time the price surpassed $100 a barrel since July. The