U.S.stocks closed mostly higher on May 27, 2026, with the Dow Jones Industrial Average reaching a new record as declining oil prices and optimism around easing tensions with Iran supported investor sentiment.The Dow gained 182.60 points, or 0.36%, finishing at 50,644.28, while the S&P 500 and Nasdaq Composite posted marginal gains, both also ending at record levels.Oil prices dropped sharply, with U.S.crude falling more than 5% to settle below $89 per barrel after reports suggested Iran could restore commercial shipping through the Strait of Hormuz, although the White House disputed those claims.Technology stocks showed mixed performance, particularly in the semiconductor sector.

While Micron Technology extended its rally—driven by strong demand linked to artificial intelligence—other chipmakers such as Intel and Qualcomm declined.Analysts cautioned that valuations in the semiconductor space may be overheated despite long-term growth prospects tied to AI.

Financial stocks were weaker, with JPMorgan shares falling after CEO Jamie Dimon indicated the bank could pursue a major acquisition worth up to $20 billion in the coming years.

Meanwhile, Bank of America warned that the stock market rally could lose momentum, advising investors to prepare for a potential summer correction due to weakening breadth and mixed momentum signals.Elsewhere, Apple continued its strong run, hitting another all-time high and reinforcing its position among the world’s most valuable companies.Small-cap stocks also performed well, with the Russell 2000 reaching a new peak.

In corporate developments, Exxon shareholders approved moving its incorporation to Texas, and several companies saw notable stock moves following earnings reports and analyst upgrades or downgrades.Overall, markets were supported by lower energy prices and resilient economic signals, though concerns about valuations and future volatility remain.