Katie GreifeldJun 4, 2026 – 2.31amA seemingly endless appetite for buying US stock dips has propelled Vanguard Group’s S&P 500-tracking ETF past $US1 trillion ($1.4 trillion) in assets, making it the first fund of its kind to reach a milestone once thought unimaginable for the ETF industry.A $US1.7 billion inflow in the latest session for which figures are available brought assets in the Vanguard S&P 500 ETF (ticker VOO) above $US1 trillion, data compiled by Bloomberg show. As such, VOO — already the largest ETF in the world — now ranks as the first and only ETF to cross $US1 trillion, a threshold reached by just a handful of open-ended funds worldwide.BloombergSubscribe to gift this articleGift 5 articles to anyone you choose each month when you subscribe.Subscribe nowAlready a subscriber? Fetching latest articles