The attacks, which strained a two-month cease-fire between Iran and the United States, were the latest jolt to energy markets.

The fresh strikes from the U.S., and the warning Iran issued in return, have brought renewed instability to the markets.

Oil prices and stock markets worldwide swung through a shaky Monday with uncertainty about what will happen with the Iran war. The S&P 500 swiveled between gains

Oil markets jolted higher Monday after Iran threatened to shut the Strait of Hormuz amid escalating tensions in the Middle East. West Texas Intermediate crude surged 7% to about $94 a barrel and Brent climbed 6% to roughly $97,

U.S. markets hovered near all-time highs Monday and oil rose more than 2% after President Donald Trump appeared to dismiss Iran’s response to a U.S. peace plan. Futures for the S&P 500 were essentially unchanged,

U.S. stocks rose May 26, with the S&P 500 up 0.4%, after President Donald Trump said negotiations with Iran were “proceeding nicely.” The price for a barrel of Brent crude, the international standard, rose 4% to $97.14. Most big U.S. companies have ...

Oil prices rose on Thursday as fresh signs of trouble in Iran peace talks as the parties hit a wall over enriched uranium. WTI crude climbed 2.2% to $100.40 while Brent gained 1.8% to $106.90 as reports emerged that Iran's Supreme Leader, Mojtaba Khamenei ...

President Donald Trump has repeatedly said a deal with Tehran to reopen Hormuz is close, but such an agreement still has not materialized.