Wall Street indexes posted modest gains and oil prices dipped on Wednesday as investors weighed the impacts of a Middle East conflict and a U.S. rate decision on a global economy already grappling with uncertainty stemming from U.

Stocks fell on Tuesday as Trump signaled that the U.S. could enter the war between Israel and Iran. Tariffs aren’t the only bearish signal on investors’ minds. Now they have to worry about a brewing war in the Middle East as well.

Global stocks slid and oil prices rose on Tuesday as fighting between Israel and Iran entered its fifth day, sowing fears of a broader regional conflict, while investors took in stride the Bank of Japan's decision to slow the pace of its bond tapering.