VMIDX Performance — Mid Cap Index Fund
Data updated: 2026-09-28
VMIDX returned +13.16% year to date and +25.51% over one year to May 2026. Annualised returns are +16.96% over 3 years and +7.65% over 5 years. The fund beat its US Mid-Cap Blend category average: $100 invested three years ago grew to $160, against $156 for the category, and to $126 over one year, against $122. Volatility over the past three years was 16.44% a year. In the 12 months to May 2026 the fund lost a net $245.7M, and assets reached $2.59B.
VMIDX Growth of $100
What $100 invested in Mid Cap 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 | VMIDX | Category average |
|---|---|---|
| 1 year (Jun 2025 – May 2026) | $126 | $122 |
| 3 years (Jun 2023 – May 2026) | $160 | $156 |
| 5 years (Jun 2021 – May 2026) | $145 | $143 |
| Since data start (Sep 2019 – May 2026) | $214 | $204 |
VMIDX Trailing Returns
Total returns to May 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +13.16% |
| 1 year | +25.51% |
| 3 years (annualised) | +16.96% |
| 5 years (annualised) | +7.65% |
VMIDX Annual Returns
Calendar-year total returns of Mid Cap Index Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–May) | +13.16% |
| 2025 | +6.95% |
| 2024 | +13.50% |
| 2023 | +15.96% |
| 2022 | −13.36% |
| 2021 | +24.33% |
| 2020 | +13.29% |
| 2019 (Sep–Dec) | +10.16% |
VMIDX 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% | +7.8% | +2.4% | — | — | — | — | — | — | — |
| 2025 | +3.8% | −4.4% | −5.5% | −2.3% | +5.3% | +3.5% | +1.6% | +3.3% | +0.4% | −0.5% | +2.0% | 0.0% |
| 2024 | −1.8% | +5.9% | +5.6% | −6.1% | +4.4% | −1.6% | +5.8% | −0.1% | +1.1% | −0.7% | +8.8% | −7.2% |
| 2023 | +9.2% | −1.8% | −3.2% | −0.8% | −3.2% | +9.1% | +4.1% | −3.0% | −5.3% | −5.3% | +8.5% | +8.6% |
| 2022 | −7.2% | +1.1% | +1.3% | −7.1% | +0.8% | −9.7% | +10.8% | −3.1% | −9.2% | +10.5% | +6.1% | −5.6% |
| 2021 | +1.5% | +6.8% | +4.6% | +4.5% | +0.2% | −1.1% | +0.3% | +1.9% | −4.0% | +5.8% | −3.0% | +5.1% |
| 2020 | −2.6% | −9.5% | −20.2% | +14.1% | +7.3% | +1.2% | +4.6% | +3.5% | −3.3% | +2.2% | +14.2% | +6.5% |
| 2019 | — | — | — | — | — | — | — | — | +3.0% | +1.1% | +2.9% | +2.7% |
VMIDX Risk
Risk measures from monthly returns over Jun 2023 – May 2026.
- 3-year volatility (annualised): 16.44%
- 3-year Sharpe ratio: 0.76 (vs 4.5% risk-free rate)
- Best month: +9.14% (Jun 2023)
- Worst month: −7.16% (Dec 2024)
VMIDX Fund Flows
Monthly money in and out of Mid Cap Index Fund, from SEC Form N-PORT.
- 12-month net flow: −$245.7M
- 12-month gross sales (incl. reinvestments): $396.1M
- Sales ÷ redemptions: 0.62×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| May 2026 | $2.6M | $32.0M | −$29.4M |
| Apr 2026 | $1.5M | $37.9M | −$36.4M |
| Mar 2026 | $304.6M | $98.8M | $205.9M |
| Feb 2026 | $1.2M | $80.9M | −$79.7M |
| Jan 2026 | $1.0M | $64.2M | −$63.1M |
| Dec 2025 | $37.0M | $58.7M | −$21.7M |
| Nov 2025 | $7.6M | $25.9M | −$18.4M |
| Oct 2025 | $1.1M | $34.8M | −$33.7M |
| Sep 2025 | $36.6M | $28.7M | $7.9M |
| Aug 2025 | $995K | $29.6M | −$28.6M |
| Jul 2025 | $1.2M | $46.3M | −$45.1M |
| Jun 2025 | $832K | $104.2M | −$103.4M |
VMIDX Assets Under Management
Net assets of Mid Cap Index Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-05-31 | $2.59B |
| 2026-02-28 | $2.64B |
| 2025-11-30 | $2.59B |
| 2025-08-31 | $2.59B |
| 2025-05-31 | $2.55B |
| 2025-02-28 | $2.79B |
| 2024-11-30 | $3.09B |
| 2024-08-31 | $2.97B |
| 2024-05-31 | $2.99B |
| 2024-02-29 | $3.06B |
| 2023-11-30 | $2.76B |
| 2023-08-31 | $3.02B |
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.