Vanguard S&P Small-Cap 600 Index Fund (VIOO) is an exchange-traded fund that seeks to track the performance of the S&P SmallCap 600 Index, a benchmark measuring the investment return of small-capitalization stocks in the United States; it employs a passive management approach with full replication of the index, holding approximately 600 small-cap U.S. equities across diverse sectors including industrials, financials, consumer discretionary, information technology, and health care. The fund offers investors low-cost exposure to small-cap blend style stocks, characterized by market capitalization typically ranging from $850 million to $3.7 billion, a low expense ratio of 0.10%, and quarterly dividend distributions, with the most recent annual payout of $1.5742 declared in December 2024. Launched on September 7, 2010, and domiciled in the United States as part of The Vanguard Group, Inc.'s Admiral Funds series, VIOO operates primarily in U.S. equity markets with assets under management exceeding $3 billion and shares outstanding around 27.74 million.
In recent developments, Vanguard announced a 2-for-1 stock split for VIOO and five other equity ETFs on March 14, 2023, enhancing share liquidity and accessibility for investors. The fund has exhibited strong performance momentum, with notable outperformance over the past six months as of December 2025, positioning it favorably for potential growth in 2026 amid favorable small-cap valuations and market rotations. Additionally, Vanguard underwent a significant reorganization in 2025, dividing its ETF and mutual fund management into Vanguard Capital Management and Vanguard Portfolio Management teams to address surging ETF demand and strategic shifts toward passive indexing. The S&P SmallCap 600 Index, which VIOO tracks, continues to emphasize profitability screens for its constituents, distinguishing it from broader small-cap benchmarks like the Russell 2000.