The iShares Semiconductor ETF Is Obliterating the S&P 500 in 2026, but Is It Still a Buy? The Answer Might Surprise You.

The iShares Semiconductor ETF (SOXX) has returned 108% in 2026, crushing the S&P 500's 10% gain over the same period. The rally reflects surging demand for AI chips, but The Motley Fool flags three headwinds that could stall momentum.

First, valuations across the ETF's holdings have expanded significantly amid the 2026 run. Second, the supply-demand dynamics fueling current chip shortages may not persist as fabrication capacity comes online. Third, rising costs associated with deploying AI infrastructure are prompting questions about whether enterprise buyers will sustain current chip purchase levels.

SOXX tracks 30 U.S.-listed semiconductor companies and has delivered strong long-term performance, but the pace of 2026 gains—more than 10 times the broader market—sets a high bar for future returns. The ETF's concentration in AI-exposed chipmakers amplified upside during the AI buildout but leaves it vulnerable if demand softens or margins compress.