Semiconductor Stocks Reach Record 18% Share of S&P 500 Market Cap

Semiconductor and semiconductor equipment stocks now account for a record share of the S&P 500's total market capitalization. The weighting stands at approximately 18 percent, the highest level for any single industry group in the index. This figure has more than tripled since the 2022 bear market.

Since 2025 The Semiconductor Index has risen 159 percent since the beginning of 2025. That gain materially exceeds the 30 percent advance recorded by the group of seven large technology companies often referred to as the Magnificent 7. The relative strength of the Semiconductor Index against those seven companies reached 85 points, the highest level since mid-2020.

At the peak of the 2000 dot-com bubble, technology hardware and equipment stocks reached a weighting of approximately 26 percent of the S&P 500. The current semiconductor weighting remains below that earlier level. Market observers have noted that the recent advance in chip-related shares coincides with increased demand tied to artificial-intelligence applications.