Stock futures were falling in the U.S. Sunday evening as oil added about 4%. Investors and traders are braced for the opening of Monday trading in New York after the weekend attacks on Iran’s nuclear sites.

Oil prices extended Monday's slide, with Brent crude futures down more than 3%, and are now back around where they were when fighting kicked off earlier this month. The cease-fire spurred a global stock-market rally,

Global markets have appeared to take the U.S. strike against nuclear targets in Iran in stride. The price of oil initially jumped more than 2% but then fell back slightly. U.S. stock futures and