IShares Semiconductor ETF sees record $5B inflow as chip fund mania reaches fever pitch

US semiconductor ETFs just had their biggest day ever. A record $7.1 billion flowed into chip-focused funds on Tuesday, with the iShares Semiconductor ETF (SOXX) alone absorbing roughly $5 billion of that total.

Earlier this year, SOXX and its main rival, the VanEck Semiconductor ETF (SMH), combined for $4.7 billion in weekly inflows, which at the time was the largest combined weekly total on record.

On July 7, 2026, the two funds pulled in over $3 billion in a single day. SMH attracted $1.78 billion, while SOXX added $1.16 billion.

Retail investors have been a surprisingly large part of the story. Approximately $12 billion poured into US semiconductor ETFs in a single month through mid-to-late June 2026. That represents a 1,200% increase compared to April levels.

SOXX has rallied approximately 90% year-to-date and now manages assets exceeding $40 billion.