U.S. stocks slumped on Tuesday under the weight of another jump for the price of oil. It was a return to form for financial markets after Wall Street’s worries about Israel’s fighting with Iran had seemed to calm a bit on Monday.

U.S. stocks slumped under the weight of a jump for the price of oil. The S&P 500 fell 0.8% Tuesday following signals that Israel’s conflict with Iran may be worsening and that one of the U.S. economy’s main engines is weakening.

Oil prices surged, stocks dropped and investors flocked to safe havens like gold on Friday after tensions between Israel and Iran escalated, stoking concerns of a broader conflict in the region.