Stock market today: Live updates

The S&P 500 was relatively unchanged on Monday, while oil prices advanced, even as Nvidia led technology higher following the launch of a new chip for PCs.

The broad market index traded around the flatline, as did the Nasdaq Composite. The Dow Jones Industrial Average lost 66 points, or 0.1%.

Oil prices rose to start the trading week. West Texas Intermediate crude futures rose 7% on Monday to around $93 a barrel, while Brent crude climbed 6% to around $96. In May, the U.S. benchmark posted its steepest monthly decline since April 2025, tumbling nearly 17%.

Those moves follow Iranian state media reporting that the country’s negotiators are stopping communication with the U.S. and that Tehran will completely shut the Strait of Hormuz because of Israeli attacks on Lebanon.

Over the weekend, Israeli Prime Minister Benjamin Netanyahu praised the country’s forces in capturing Beaufort castle in southern Lebanon as troops moved further into Lebanon.

Meanwhile, the U.S. and Iran exchanged strikes, with U.S. Central Command saying Monday that U.S. forces intercepted two Iranian ballistic missiles overnight that were targeting American forces in Kuwait.

Nvidia shares offered some support to the broader market, climbing more than 3% after the company unveiled a new processor for personal computers. Dell Technologies and HP Inc followed Nvidia higher, rising more than 5% and about 3%, respectively. Intel, which for years dominated the PC chip market, fell more than 4%.

Stocks wrapped up a strong May, with all three major indexes posting solid gains. The tech-heavy Nasdaq Composite led the advance, up more than 8% for the month. The S&P 500 gained about 5%, while the Dow Jones Industrial Average added nearly 3%.

The major averages closed at fresh highs Friday after the U.S. and Iran reached a 60-day memorandum of understanding to extend the ceasefire.

President Donald Trump said he would meet in the Situation Room “to make a final determination” and reiterated that Iran “must agree that they will never have a Nuclear Weapon.” He also called for the Strait of Hormuz to be “immediately open.”

“Trump clearly doesn’t want to escalate and is looking for an off-ramp. Some type of a pact is very likely, and markets largely assume a sustained cessation of hostilities,” Adam Crisafulli, founder of Vital Knowledge, wrote in a note. “An actual announcement will probably trigger a ‘sell the news’ reaction for the overall S&P 500.”