Nasdaq and S&P 500 Hit New Highs as Chip Stocks Surge

The Nasdaq Composite and S&P 500 reached new all-time highs on May 5, 2026, powered by a broad and forceful rally in semiconductor stocks. INTC led the charge with a 13.5% single-day surge—one of the company's largest gains in recent years—after reporting stronger-than-expected demand recovery in its data center chip business and signaling improved gross margin trajectory ahead. The move reflected growing conviction that the AI infrastructure buildout is entering a durable multi-year capital expenditure cycle.

Memory chipmakers amplified the gains, with MU rising 12% and SanDisk climbing 10% on reports of tightening supply in the high-bandwidth memory market—a critical component powering AI accelerator systems. Analysts attributed the strength to a combination of improving demand fundamentals and aggressive short-covering, with memory stocks having meaningfully lagged the AI trade despite their structural role in enabling large language model inference at scale.

The broad-based chip rally lifted the Philadelphia Semiconductor Index to record territory alongside the major indices, reinforcing the growing conviction that AI demand will sustain elevated memory and logic chip pricing through 2026 and into 2027. Investors are now watching whether the strength extends to equipment makers and advanced packaging suppliers—or whether the move represents an overextended sprint ahead of Q2 earnings reports that will test whether the AI demand signal is as robust as current valuations imply.

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