Stock Market Today: Nasdaq Rises 1.29% as Micron Leads Chip Rally

Key Takeaways

• The Nasdaq Composite climbed 1.29%, while the S&P 500 gained 0.89% and the Dow Jones advanced 0.74%.
• Semiconductor and storage stocks led the rebound, with Micron rising 12.17%, SanDisk gaining 14.27% and Western Digital adding 12.51%.
• Investors returned to AI-related stocks ahead of major technology earnings, although elevated oil prices and geopolitical tensions remained key market risks.

Wall Street Ends Three-Day Losing Streak

U.S. Stocks closed higher on Tuesday, July 21, as a powerful semiconductor rally helped Wall Street recover from three consecutive sessions of losses. Renewed demand for artificial intelligence and memory-chip stocks pushed the Nasdaq Composite ahead of the other major benchmarks.

The Nasdaq rose 329.13 points, or 1.29%, to close at 25,837.21. The S&P 500 added 65.92 points, or 0.89%, to 7,509.20, while the Dow Jones Industrial Average gained 385.38 points, or 0.74%, to finish at 52,224.64. The small-cap Russell 2000 also advanced 1.5% to 2,987.40.

Nine of the S&P 500’s 11 sectors ended higher. Information technology led with a 2.35% gain, while consumer staples fell 1% and communication services declined 0.85%.

Semiconductor Stocks Power the Market Rebound

Semiconductors became the centre of the day’s recovery. The Philadelphia Semiconductor Index surged 5.21% to 12,356.16, marking its second consecutive advance and its strongest session in more than a month.

Memory and storage companies recorded some of the largest gains:

• SanDisk (SNDK) surged 14.27%.
• Western Digital (WDC) gained 12.51%.
• Micron Technology (MU) jumped 12.17%.
• Seagate Technology (STX) advanced 11.14%.
• Intel (INTC) rose 8.64%.
• AMD gained 8.11%.

SanDisk, Western Digital and Micron were the three strongest performers in the S&P 500 during the session, highlighting the concentration of buying interest in the memory and storage supply chain.

The rally extended beyond memory producers. Semiconductor equipment, optical-component and data-centre hardware companies also moved higher, suggesting that investors were rebuilding exposure across the broader AI infrastructure ecosystem. Nvidia gained approximately 2%, providing additional support to the Nasdaq.

Why Did Chip Stocks Rise Today?

The rebound followed a sharp correction across the semiconductor sector. Before the latest two-day recovery, the Philadelphia Semiconductor Index had finished Friday more than 20% below its late-June record.

The earlier sell-off reflected growing concerns about elevated AI stock valuations, the scale of technology companies’ capital expenditure and the time required for those investments to generate sufficient returns. Competition from lower-cost Chinese AI models had also raised questions about whether current infrastructure spending could remain sustainable.

However, the size of the pullback encouraged some investors to return ahead of major technology earnings. Market participants appeared concerned about missing a potential recovery if chipmakers and cloud companies delivered stronger-than-expected results or raised their forecasts.

This does not necessarily mean that concerns about AI valuations have disappeared. The semiconductor index remained nearly 75% higher for the year despite its recent correction. Consequently, upcoming earnings will need to show that demand for memory, GPUs, networking equipment and data-centre capacity remains strong enough to support current valuations.

The speed of Tuesday’s advance may also indicate that short covering and tactical dip-buying contributed to the rally. A two-day rebound alone does not confirm that the recent technology correction has ended.

Corporate Earnings Produce Sharp Stock Moves

Outside the technology sector, earnings results created significant moves in individual companies.

3M shares rose 7.3% after the industrial group increased its full-year profit forecast. Hasbro jumped 8.8% after raising its annual revenue and earnings expectations, supported by demand for its digital gaming operations and Magic: The Gathering products.

General Motors gained approximately 4.9% after its quarterly results exceeded expectations and the company lifted its full-year outlook.

Not all earnings reactions were positive. Danaher dropped 11% after reducing its core revenue growth forecast and reporting weaker biotechnology revenue. MSCI declined 10% after the index provider raised its operating-expense outlook, while Genuine Parts fell 2.7% after lowering its annual profit forecast.

These mixed performances showed that company-specific forecasts remained important even as the wider market was lifted by semiconductor stocks.

What Could Drive the U.S. Stock Market Next?

Technology earnings are likely to determine whether the semiconductor rebound can continue. Alphabet is scheduled to release its second-quarter results on July 22, with investors closely monitoring Google Cloud growth, AI-related revenue and the company’s heavy infrastructure spending. The reporting date is confirmed by Alphabet Investor Relations.

Results from Intel and Texas Instruments will provide further information about demand across data centres, personal computers, industrial chips and semiconductor manufacturing.

For the broader market, the central question is whether the latest gains represent the beginning of a more durable recovery or a short-term rebound after an aggressive sell-off. Strong earnings and confident corporate guidance could reinforce demand for AI hardware stocks. Weak guidance, slower cloud growth or further increases in capital expenditure could bring valuation concerns back into focus.