The Vanguard S&P 500 ETF (VOO) is on the verge of becoming the first exchange-traded fund to surpass $1 trillion in assets. With roughly $980.7 billion currently under management and daily inflows averaging $1.25 billion, the milestone is expected within days.
To put that figure in context: $1 trillion is larger than the GDP of all but about 16 countries, all sitting inside a single fund that charges just 0.03% annually-or $3 for every $10,000 invested.
How VOO overtook SPY
For years, the SPDR S&P 500 ETF Trust (SPY) dominated the ETF space, launching in 1993 and holding the crown for decades. But VOO overtook SPY in February 2025-and now leads by roughly $200 billion in total assets.
The decisive advantage: fees. SPY charges 0.09%; VOO charges 0.03%. In 2025 alone, VOO attracted over $100 billion in inflows. ETF analyst Eric Balchunas calls it the “VOO and Chill” strategy.
Why this matters
Todd Rosenbluth of TMX VettaFi called this “a tremendous milestone for the ETF industry.” The S&P 500’s strong performance, particularly in tech and AI stocks, has made the passive approach look brilliant.
What investors need to know
For current VOO holders, the trillion-dollar mark changes nothing about the underlying investment. You still own roughly 500 large-cap U.S. companies, heavily weighted toward mega-cap tech stocks. That concentration risk is worth watching: the S&P 500 has become increasingly top-heavy, and buying VOO means buying that concentration, whether intended or not.