Investors brace for a surge in oil prices, pressure on stocks and volatility across financial markets after the U.S. bombs Iran's nuclear sites.

Dow Jones futures, the S&P 500, and Nasdaq futures are expected to open on Sunday evening following President Donald Trump's announcement that the U.S. had conducted airstrikes on three Iranian nuclear facilities.

Investors on Sunday were bracing for a flight to safety after the U.S. struck Iranian nuclear facilities Saturday evening.