Dow drops nearly 300 after trimming an earlier plunge of 1,200 as oil prices leap even higher

A sell-off for stocks wrapped around the world and hit Wall Street, while oil prices leaped even higher on worries about the widening war with Iran. But the big moves that rocked markets Tuesday morning eased substantially as the day progressed. By the late afternoon, the S&P 500 was down 0.8%. I…