U.S. Stock Funds Record $119.2B Inflow in One Week, Nasdaq 100 Surges 24% YTD Amid AI Rally

According to Bank of America data, U.S. stock funds recorded net inflows of $119.2 billion in the week ending June 17, marking the highest single-week inflow on record, with technology stocks attracting $19.2 billion. Mid-cap stock funds drew $19.9 billion in weekly net inflows and small-cap funds received $12.3 billion, both historic highs.

The Nasdaq 100 index has climbed 24% year-to-date and the S&P 500 has gained 9.6%, both hitting new highs. Meanwhile, nine U.S. semiconductor equipment companies with market caps exceeding $10 billion have surged over 75% this year and reached historic peaks, with MKS Instruments leading at a 154.9% annual gain, according to latest market data.