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.

The price of Brent crude oil, the international standard, rose 3.3% to $79.60 a barrel. U.S. crude rose 3.1% to $76.16 a barrel.

The escalating Middle East conflict and tariffs are threatening to overshadow the stock market’s gains in June, indicating a potentially rough summer following the recent rally of the S&P 500 toward i