Overview
- The Vanguard S&P 500 ETF (VOO) crossed the $1 trillion assets mark after a roughly $1.7 billion single-day inflow that pushed its total above the threshold, a milestone reported in early June.
- VOO’s rise was driven by persistent net inflows over multiple years, including about $69 billion so far in 2026 and more than $100 billion in 2025, making it the largest ETF by assets.
- A key attraction has been VOO’s ultra-low expense ratio of 0.03 percent versus SPY’s roughly 0.09 percent, a small fee gap that compounds into large advantages for buy-and-hold investors.
- Analysts warn that market-cap weighting means new money disproportionately buys the largest stocks, a feedback loop that has pushed the S&P 500’s top holdings and tech sector to a much larger share of the index.
- The milestone highlights a broader shift to low-cost passive wrappers and makes ETF choice more consequential for ordinary investors, who can use equal-weight or dividend-focused ETFs to reduce tech concentration or seek income.