Retail investors have committed a record $22.5 billion to US-listed semiconductor ETFs in 2026, marking one of the most concentrated sector bets in recent history. The pace has been staggering. In a single month spanning mid-to-late June, inflows hit roughly $12 billion, a 1,200% increase from April levels.

The iShares Semiconductor ETF (SOXX) has risen approximately 90% year-to-date. The VanEck Semiconductor ETF (SMH) remains a retail favorite, heavily weighted towards Nvidia. The most remarkable story is the Roundhill Memory ETF (DRAM), which launched on April 2 and quickly accumulated over $17 billion in assets.

This frenzy is rooted in strong fundamentals. Global semiconductor revenue hit $298.5 billion in the first quarter of 2026, a 25% jump from the prior quarter. The investment thesis is driven by accelerating AI demand.

However, experts caution that the easy money may have already been made. Such a concentrated retail flow creates conditions for a potential reflexive selloff if sentiment shifts. The key metric to watch is AI capital expenditure guidance from major hyperscalers like Microsoft, Google, Amazon, and Meta. As long as they continue raising spending forecasts, the semiconductor revenue pipeline remains intact.