
MAY 26, 2026
Earnings Spotlight Turns to Marvell, Salesforce and Costco as Stock Rally Seeks Broader Support
MAY 26, 2026
U.S. equity benchmarks moved higher on Tuesday, May 26, 2026, as trading resumed after the Memorial Day break and investors returned to a market still leaning on large-cap technology leadership. The Nasdaq Composite led the advance, while the S&P 500 pushed closer to record territory and the Dow Jones Industrial Average lagged as gains remained concentrated in growth and AI-linked shares.
By late morning in New York, the S&P 500 was up about 0.8%, the Nasdaq Composite had gained roughly 1.3%, and the Dow was little changed to slightly lower. The split underlined the market’s current structure: index momentum remains strong, but it is being driven more by megacap technology and semiconductor exposure than by a broad cyclical surge.
The move followed an eighth consecutive weekly gain for the S&P 500, keeping attention on whether the benchmark can extend its rally in a shortened trading week. A firmer tone in global risk appetite also helped U.S. indexes catch up with overseas markets that traded while Wall Street was closed on Monday.
The Nasdaq’s outperformance showed that investors are still willing to pay for companies tied to artificial intelligence infrastructure, cloud demand, and advanced chip spending. Nvidia remained central to the index narrative after its latest results and cash-return plans kept AI exposure at the front of portfolio positioning.
For index investors, the key question is whether AI leadership can keep offsetting narrower participation elsewhere in the market. A cap-weighted rally can continue for longer than skeptics expect when the largest companies are producing earnings momentum, but it also increases sensitivity to any disappointment from a small group of dominant stocks.
That concentration risk was visible in the Dow’s relative weakness. The blue-chip average has less exposure to the largest AI platform and semiconductor names than the Nasdaq, leaving it less able to benefit from the same growth trade. The result was a session in which headline index performance looked constructive, but the internal leadership remained selective.
The S&P 500’s climb toward record levels puts market breadth back under scrutiny. A decisive breakout would likely require more than strength in a handful of megacaps. Investors are watching whether industrials, financials, consumer stocks, and smaller companies can participate if yields remain stable and earnings expectations hold up.
Treasury yields remain an important swing factor. Higher yields can pressure long-duration growth stocks by making future earnings less valuable, while falling yields can quickly revive demand for technology-heavy indexes. With Federal Reserve expectations still central to market pricing, every inflation reading and policy signal carries the potential to reshape the index trade.
Geopolitical headlines also remain part of the risk backdrop. Hopes for easing tension in the Middle East have helped reduce some of the immediate inflation concern tied to energy prices, but traders are cautious about treating that relief as permanent. Any renewed jump in oil prices could quickly feed back into rate expectations and challenge equity multiples.
The holiday-shortened week may amplify moves because traders have fewer sessions to adjust positioning before upcoming macroeconomic data and fresh corporate updates. That can make intraday rallies more vulnerable to reversals, particularly when major benchmarks are already near highs and investor positioning is heavily tilted toward winning technology trades.
Still, the opening tone suggests buyers remain prepared to defend the broader uptrend. The S&P 500’s eight-week winning streak has created a momentum cushion, and the Nasdaq’s renewed leadership points to continued confidence in the AI earnings cycle. Unless yields rise sharply or technology guidance deteriorates, index dips may continue to attract buyers looking for exposure to the strongest parts of the market.
For now, the index-market signal is constructive but not risk-free: the S&P 500 is within reach of fresh highs, the Nasdaq is carrying the session, and the Dow’s hesitation shows that investors are still choosing growth leadership over broad-market rotation.