Stock market today: Dow, S&P 500, Nasdaq rebound, oil prices reverse on hopes of a US-Iran
May 21, 2026
LIVE Updated 5 mins ago
US stocks reversed losses on Thursday and turned higher on reports that an agreement between the US and Iran had been reached with Pakistani mediation and after Secretary of State Marco Rubio said there were “some good signs” that a deal to end the war in Iran could be in sight.
The benchmark S&P 500 (^GSPC) rose by 0.2% after a winning day on Wall Street, while the tech-heavy Nasdaq Composite (^IXIC) added 0.3% following earnings from Nvidia and an S-1 filing for the upcoming IPO of SpaceX on Wednesday afternoon. The Dow Jones Industrial Average (^DJI) gained 0.5%.
Oil prices edged lower after rising throughout the morning, with Brent crude oil (BZ=F) falling back to $104 per barrel and US West Texas Intermediate (CL=F) dropping below $100 again. Earlier in the day, oil rose after Iran’s supreme leader issued a directive that the country’s near-weapons-grade uranium should not be sent abroad, raising doubts about the progress of peace talks between the US and Iran.
Hopes that the end of the war could be on the horizon emerged after Iranian media said a finalized deal that would guarantee passage through the Strait of Hormuz and implement a ceasefire would be announced imminently.
Secretary of State Marco Rubio also said there were “some good signs” of a deal but added that he didn’t “want to be overly optimistic.”
Meanwhile, investors continued to assess Nvidia’s (NVDA) earnings that landed after the bell on Wednesday, beating expectations on the top and bottom lines. The AI giant also issued an upbeat forecast for chip sales, but investors had hoped for an even stronger signal of demand.
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Walmart (WMT) stock fell 2% in premarket trading after reporting first quarter results that were in line with Wall Street’s expectations but a second quarter outlook that came in a bit light.
Yahoo Finance’s Brooke Dipalma reports on the quarter:
In the first quarter, the big box retailer posted same-store sales growth of 4.1% in the US, above the 3.85% growth Wall Street analysts expected, according to Bloomberg consensus estimates. Higher foot traffic, ticket sizes, and 26% growth in e-commerce sales drove results.
Revenue grew 7.3% to $177.8 billion, more than the $174.8 billion the Street anticipated. Walmart reported adjusted earnings of $0.66, in line with estimates. Both metrics were above the forecast Walmart shared in the prior quarter.
The company gained share across all categories again, including grocery, health and wellness, and merchandise and income cohorts, led by high-income shoppers.
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