Semiconductor Stocks Jumped in May Can the Rally Last Into Summer?

Strong May for chip stocks

Semiconductor stocks had a powerful month in May. Advanced Micro Devices (AMD) jumped more than 40% to a record high as demand for AI hardware surged. Qualcomm also climbed about 40% to its own record after reports about a new customer opportunity. The Philadelphia Semiconductor Index has now gained over 60% for the year, far outpacing the S&P 500.

These gains left many investors asking whether the rally can continue into summer or whether prices have already outrun the businesses that back them.

Why the rally happened: clear AI demand

Part of the rally is backed by real business growth tied to AI. AMD reported strong first-quarter results in early May: revenue rose 38% year over year to $10.3 billion. Its data-center revenue, driven by EPYC server processors and Instinct GPUs, grew 57% to a record $5.8 billion. Non-GAAP earnings per share rose 43%, and management guided for about $11.2 billion in second-quarter revenue implying roughly 46% year-over-year growth.

Broadcom is another clear example. In its fiscal first quarter of 2026 (period ended Feb. 1, 2026), revenue rose 29% to a record $19.3 billion. Broadcom said its AI-related revenue more than doubled, increasing 106% to $8.4 billion. It now serves multiple large cloud customers with custom accelerators and networking chips and guided to about $22 billion in fiscal second-quarter revenue, up 47%.

Qualcomms big May move looked different. The stock surged largely on reports that Qualcomm reached a deal to supply ByteDance (TikToks owner) with custom chips for AI data centers. Neither company confirmed the deal publicly, so the move was more speculative. Still, investors also see Qualcomm as a potential beneficiary as AI spreads into mobile devices and the physical world.

Valuations and the risk picture

Even though businesses like AMD and Broadcom are growing rapidly, prices now reflect very high expectations. AMD trades at a forward price-to-earnings ratio near 69, while Broadcom trades above 40 times forward earnings. These multiples assume that AI demand will keep growing at a strong pace for years without a stumble.

Qualcomm looks cheaper at roughly 21 times forward earnings, but its core handset business is weaker. Fiscal second-quarter revenue fell 3% year over year, handset chip sales dropped 13%, and adjusted earnings per share declined about 7%. Management guided for a sequential slow patch in the current quarter. Qualcomms rally is therefore more of a bet on future traction in AI-related products than on current revenue strength.

The near-term test: Broadcoms report

Broadcoms June quarterly report is a key near-term event for the sector. A strong quarter and confident outlook could extend the groups momentum into summer. Conversely, any sign that AI spending is cooling or that customers are slowing orders could trigger a pullback across chip stocks.

Still, the underlying businesses look healthy. Even if stock prices take a breather, many companies have solid revenue growth and improving profit margins because they supply chips and systems needed for AI infrastructure.

How investors might think about positioning

At current valuations, the main risk is not that AI demand disappears overnight. The bigger risk is that the market expects perfection: merely good results may no longer be enough to support these high multiples. For long-term investors who believe in AIs secular growth, high-quality companies could still be attractive, but buying at peaks increases short-term downside risk.

Patience can be a wise approach. Waiting for a pullback or for clearer confirmation that revenue and margin growth will continue can reduce the chance of buying right before a correction. For traders, monitoring upcoming earnings reports and guidance especially from Broadcom and other large AI suppliers will be crucial.

Conclusion

Mays rally in semiconductor stocks was driven by real AI demand and strong results at companies like AMD and Broadcom, but valuations now imply years of uninterrupted growth. Qualcomms surge was more speculative and tied to potential new AI customers. The sectors path into summer will likely hinge on upcoming earnings and guidance. If results remain strong, the rally could continue; if guidance disappoints, prices may pull back. For most investors, a measured approach that balances conviction in the AI story with attention to valuations and upcoming earnings is the safest way forward.