NEW YORK (AP) — Oil prices and stock markets worldwide kept swinging Monday with uncertainty about what will happen with the Iran war.

The S&P 500 swiveled between gains and losses through the morning before sinking 0.4%. It’s heading toward its second straight drop since setting an all-time high last week. The Dow Jones Industrial Average was up 17 points, or less than 0.1%, with half an hour remaining in trading, and the Nasdaq composite was 0.9% lower.

Stock prices moved in the opposite direction of oil prices, which have been swinging on uncertainty about how long the Iran war will keep the Strait of…