Stocks fell sharply Thursday, and oil prices rose as doubt took over again from hope on Wall Street about a possible end to the war with Iran. The S&P 500 slumped 1.7% for its worst day since January and is back on track for a fifth straight losing week.

Hopes for a possible end to the war with Iran pushed stocks higher on Wall Street on Wednesday, while oil prices eased. The S&P 500 rose 0.5% in its latest flip - flop after the United States delivered a plan to pause the war to Iran.

Oil prices were back up and stocks markets fell Thursday as Mr. Trump issued a stern new warning for Iran's leaders to agree to a deal to end the war on his terms, "before it is too late."

Oil pared much of its earlier price declines on Wednesday as traders monitored efforts to de-escalate hostilities in the Persian Gulf and a resumption of some crude flows in the region. Prospects for a cease-fire still appeared out of reach.

Investors cheered reports of a plan to end the Iran war. Stocks rallied and oil prices tumbled, though some market pros remained cautious.

Hopes for a possible end to the war with Iran are pushing stocks higher again on Wall Street Wednesday, while oil prices ease. The S&P 500 rose 0.6% in its latest flip - flop after the United States delivered a plan to pause the war to Iran.

U.S. stocks rose Wednesday and global oil prices fell, as traders and investors were buffeted by constant headlines about the war in Iran.

The US president said talks to end the war are underway with Iran - a claim that officials in Tehran have disputed.