Oil prices got back to jumping on Wednesday, while sinking technology stocks dragged Wall Street lower amid uncertainty about what the Federal Reserve will do to get high inflation under control.

The S&P 500 fell 1.5% after swinging sharply between gains and losses in the last hour of trading. The Dow Jones Industrial Average dropped 1,153 points, or 2.2%, and the Nasdaq composite slumped 1.7% to fall 9.8% below its record set last month.

The action was more decisive in the oil market, where the price of Brent crude leaped 7.3% to settle at $88.09 per barrel after fighting resumed in the war with Iran and raised worries about the global flow of oil.