IVOO Performance — Vanguard S&P Mid-Cap 400 Index Fund
Data updated: 2026-07-29
IVOO returned +13.25% year to date and +25.79% over one year to May 2026. Annualised returns are +17.36% over 3 years and +7.98% over 5 years. The fund beat its US Mid-Cap Blend category average: $100 invested three years ago grew to $162, against $156 for the category, and to $126 over one year, against $122. Volatility over the past three years was 16.45% a year. In the 12 months to May 2026 the fund took in a net $348.5M, and assets reached $5.60B.
IVOO Growth of $100
What $100 invested in Vanguard S&P Mid-Cap 400 Index Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the US Mid-Cap Blend category average over the same months.
| Period | IVOO | Category average |
|---|---|---|
| 1 year (Jun 2025 – May 2026) | $126 | $122 |
| 3 years (Jun 2023 – May 2026) | $162 | $156 |
| 5 years (Jun 2021 – May 2026) | $147 | $143 |
| Since data start (Sep 2019 – May 2026) | $218 | $204 |
IVOO Trailing Returns
Total returns to May 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +13.25% |
| 1 year | +25.79% |
| 3 years (annualised) | +17.36% |
| 5 years (annualised) | +7.98% |
IVOO Annual Returns
Calendar-year total returns of Vanguard S&P Mid-Cap 400 Index Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–May) | +13.25% |
| 2025 | +7.43% |
| 2024 | +13.82% |
| 2023 | +16.34% |
| 2022 | −13.14% |
| 2021 | +24.63% |
| 2020 | +13.54% |
| 2019 (Sep–Dec) | +10.32% |
IVOO 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 | +4.0% | +4.1% | −5.4% | +7.9% | +2.5% | — | — | — | — | — | — | — |
| 2025 | +3.8% | −4.4% | −5.5% | −2.2% | +5.4% | +3.6% | +1.6% | +3.4% | +0.5% | −0.5% | +2.0% | +0.1% |
| 2024 | −1.7% | +5.9% | +5.6% | −6.0% | +4.4% | −1.6% | +5.8% | −0.1% | +1.2% | −0.7% | +8.8% | −7.1% |
| 2023 | +9.2% | −1.8% | −3.2% | −0.8% | −3.2% | +9.2% | +4.1% | −2.9% | −5.3% | −5.3% | +8.5% | +8.7% |
| 2022 | −7.2% | +1.1% | +1.4% | −7.1% | +0.7% | −9.6% | +10.8% | −3.1% | −9.2% | +10.5% | +6.1% | −5.6% |
| 2021 | +1.5% | +6.8% | +4.7% | +4.5% | +0.2% | −1.0% | +0.3% | +1.9% | −4.0% | +5.9% | −2.9% | +5.1% |
| 2020 | −2.6% | −9.5% | −20.3% | +14.2% | +7.3% | +1.2% | +4.6% | +3.5% | −3.3% | +2.2% | +14.3% | +6.5% |
| 2019 | — | — | — | — | — | — | — | — | +3.1% | +1.1% | +3.0% | +2.8% |
IVOO Risk
Risk measures from monthly returns over Jun 2023 – May 2026.
- 3-year volatility (annualised): 16.45%
- 3-year Sharpe ratio: 0.78 (vs 4.5% risk-free rate)
- Best month: +9.15% (Jun 2023)
- Worst month: −7.14% (Dec 2024)
IVOO Fund Flows
Monthly money in and out of Vanguard S&P Mid-Cap 400 Index Fund, from SEC Form N-PORT.
- 12-month net flow: $348.5M
- 12-month gross sales (incl. reinvestments): $1.2B
- Sales ÷ redemptions: 1.42×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| May 2026 | $76.4M | $15.7M | $60.7M |
| Apr 2026 | $128.8M | $67.8M | $61.0M |
| Mar 2026 | $214.0M | $218.0M | −$4.0M |
| Feb 2026 | $130.8M | $102.4M | $28.4M |
| Jan 2026 | $121.8M | $55.9M | $65.9M |
| Dec 2025 | $111.4M | $73.3M | $38.0M |
| Nov 2025 | $69.7M | $44.5M | $25.2M |
| Oct 2025 | $72.7M | $33.7M | $39.0M |
| Sep 2025 | $134.0M | $84.7M | $49.3M |
| Aug 2025 | $86.0M | $52.9M | $33.1M |
| Jul 2025 | $27.2M | $39.4M | −$12.2M |
| Jun 2025 | $14.4M | $50.4M | −$36.0M |
IVOO Assets Under Management
Net assets of Vanguard S&P Mid-Cap 400 Index Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-05-31 | $5.60B |
| 2026-02-28 | $5.26B |
| 2025-11-30 | $4.74B |
| 2025-08-31 | $4.54B |
| 2025-05-31 | $4.21B |
| 2025-02-28 | $4.09B |
| 2024-11-30 | $4.30B |
| 2024-08-31 | $3.69B |
| 2024-05-31 | $3.43B |
| 2024-02-29 | $3.30B |
| 2023-11-30 | $3.04B |
| 2023-08-31 | $3.14B |
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.