The Vanguard S&P 500 ETF became the first ETF to pass $1 trillion in assets just as the S&P 500 hovered near a record, a milestone that shows how much money has piled into VOO even after a sharp run-up in stocks.
Investors in VOO have poured in about $50 billion in the past month alone, adding to some $386 billion in net assets collected over the past three years. The scale is hard to miss. VOO is the largest ETF in the world, and the surge in assets has come while the S&P 500 rose about 17% since April 1 to 7,430, only two weeks removed from its all-time high of 7,620 on June 2.
That is why the search around VOO stock is not just about size. It is about price. The Shiller P/E ratio sits at 41, its highest level since the dotcom boom in 1999 and above where it stood in October 2021, before the 2022 bear market. In that earlier slump, the S&P 500 lost 19% while the WisdomTree U.S. High Dividend ETF gained 8%. That same dividend fund is up 13% year to date and is beating the S&P 500, which has made it a cleaner fit for investors who want market exposure without paying up for every index point.
For VOO holders, the contradiction is plain: the fund has been treated like a portfolio staple because it tracks the market and spreads risk across the S&P 500, but the market itself looks expensive. The last time VOO saw significant net outflows was in March 2026, when war in Iran coincided with a decline in the S&P 500, a reminder that money can leave fast when conditions turn. Yet today the money is still coming in, even as valuations suggest the easy gains may already be behind it.
That does not make VOO a bad fund. It makes the next decision more delicate. Investors who already own it may be better served by keeping their position rather than adding aggressively at these levels, while those looking to deploy new cash may want to consider the WisdomTree U.S. High Dividend ETF instead of buying more VOO right after a stretch that pushed the S&P 500 to a near record. The open question now is not whether VOO is important — it is — but whether today is the right day to pay this much for it.
