Global oil prices top $91 a barrel after U.S. and Iran exchange fire for the first time in a month

The rise came a day after the United States said it had attacked Iranian rocket launchers on a small island in the Strait of Hormuz, marking its first strikes on Iran in a month.

U.S. forces on Sunday struck two launchers on Iran's Larak island in the Strait of Hormuz. It was the first known American strike on the Gulf nation since late July. Iran…