VIOO Performance — Vanguard S&P Small-Cap 600 Index Fund
Data updated: 2026-07-29
VIOO returned +15.48% year to date and +33.33% over one year to May 2026. Annualised returns are +16.33% over 3 years and +5.86% over 5 years. Against its US Small Blend category average the fund came out behind over three years but ahead over one: $100 invested three years ago grew to $157, against $160 for the category, and to $133 over one year, against $132. Volatility over the past three years was 19.54% a year. In the 12 months to May 2026 the fund took in a net $222.5M, and assets reached $5.89B.
VIOO Growth of $100
What $100 invested in Vanguard S&P Small-Cap 600 Index Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the US Small Blend category average over the same months.
| Period | VIOO | Category average |
|---|---|---|
| 1 year (Jun 2025 – May 2026) | $133 | $132 |
| 3 years (Jun 2023 – May 2026) | $157 | $160 |
| 5 years (Jun 2021 – May 2026) | $133 | $135 |
| Since data start (Sep 2019 – May 2026) | $204 | $206 |
VIOO Trailing Returns
Total returns to May 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +15.48% |
| 1 year | +33.33% |
| 3 years (annualised) | +16.33% |
| 5 years (annualised) | +5.86% |
VIOO Annual Returns
Calendar-year total returns of Vanguard S&P Small-Cap 600 Index Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–May) | +15.48% |
| 2025 | +5.99% |
| 2024 | +8.62% |
| 2023 | +16.00% |
| 2022 | −16.20% |
| 2021 | +26.67% |
| 2020 | +11.43% |
| 2019 (Sep–Dec) | +11.79% |
VIOO Monthly Returns
Monthly total returns as reported on SEC Form N-PORT.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +5.6% | +2.2% | −4.1% | +10.4% | +1.0% | — | — | — | — | — | — | — |
| 2025 | +2.9% | −5.7% | −6.2% | −4.2% | +5.2% | +4.1% | +0.9% | +7.1% | +1.0% | −0.9% | +2.6% | −0.1% |
| 2024 | −4.0% | +3.3% | +3.2% | −5.6% | +5.0% | −2.3% | +10.8% | −1.5% | +0.8% | −2.6% | +10.9% | −8.0% |
| 2023 | +9.5% | −1.2% | −5.2% | −2.8% | −1.7% | +8.2% | +5.5% | −4.1% | −6.0% | −5.7% | +8.3% | +12.8% |
| 2022 | −7.3% | +1.4% | +0.4% | −7.8% | +1.9% | −8.6% | +10.0% | −4.4% | −9.9% | +12.4% | +4.2% | −6.7% |
| 2021 | +6.3% | +7.7% | +3.3% | +2.0% | +2.1% | +0.3% | −2.4% | +2.0% | −2.4% | +3.4% | −2.3% | +4.5% |
| 2020 | −4.0% | −9.6% | −22.4% | +12.7% | +4.3% | +3.8% | +4.1% | +4.0% | −4.7% | +2.6% | +18.2% | +8.3% |
| 2019 | — | — | — | — | — | — | — | — | +3.3% | +1.9% | +3.1% | +3.0% |
VIOO Risk
Risk measures from monthly returns over Jun 2023 – May 2026.
- 3-year volatility (annualised): 19.54%
- 3-year Sharpe ratio: 0.61 (vs 4.5% risk-free rate)
- Best month: +12.81% (Dec 2023)
- Worst month: −7.96% (Dec 2024)
VIOO Fund Flows
Monthly money in and out of Vanguard S&P Small-Cap 600 Index Fund, from SEC Form N-PORT.
- 12-month net flow: $222.5M
- 12-month gross sales (incl. reinvestments): $1.6B
- Sales ÷ redemptions: 1.17×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| May 2026 | $77.2M | $42.8M | $34.4M |
| Apr 2026 | $88.2M | $58.1M | $30.1M |
| Mar 2026 | $249.9M | $215.1M | $34.8M |
| Feb 2026 | $148.3M | $108.7M | $39.7M |
| Jan 2026 | $200.1M | $75.0M | $125.1M |
| Dec 2025 | $303.0M | $204.2M | $98.8M |
| Nov 2025 | $176.8M | $182.4M | −$5.6M |
| Oct 2025 | $113.0M | $78.6M | $34.4M |
| Sep 2025 | $103.6M | $134.4M | −$30.8M |
| Aug 2025 | $60.7M | $26.3M | $34.5M |
| Jul 2025 | $14.8M | $127.9M | −$113.1M |
| Jun 2025 | $15.7M | $75.4M | −$59.7M |
VIOO Assets Under Management
Net assets of Vanguard S&P Small-Cap 600 Index Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-05-31 | $5.89B |
| 2026-02-28 | $5.41B |
| 2025-11-30 | $4.83B |
| 2025-08-31 | $4.70B |
| 2025-05-31 | $4.31B |
| 2025-02-28 | $4.55B |
| 2024-11-30 | $5.27B |
| 2024-08-31 | $4.90B |
| 2024-05-31 | $4.51B |
| 2024-02-29 | $4.58B |
| 2023-11-30 | $4.08B |
| 2023-08-31 | $4.19B |
For information only. Not investment advice: figures are as reported in SEC filings and may contain errors or be out of date. Past performance does not guarantee future results.