DMIDX Performance — BNY Mellon Midcap Index Fund, Inc., Class I
Data updated: 2026-09-24
DMIDX returned +14.36% year to date and +20.60% over one year to Jul 2026. Annualised returns are +12.68% over 3 years and +8.19% over 5 years. Against its US Mid-Cap Blend category average the fund came out behind over three years but ahead over one: $100 invested three years ago grew to $143, against $144 for the category, and to $121 over one year, against $119. Volatility over the past three years was 15.89% a year. In the 12 months to Jul 2026 the fund lost a net $203.5M, and assets reached $1.30B.
DMIDX Growth of $100
What $100 invested in BNY Mellon Midcap Index Fund, Inc. 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 | DMIDX | Category average |
|---|---|---|
| 1 year (Aug 2025 – Jul 2026) | $121 | $119 |
| 3 years (Aug 2023 – Jul 2026) | $143 | $144 |
| 5 years (Aug 2021 – Jul 2026) | $148 | $145 |
| Since data start (Aug 2019 – Jul 2026) | $209 | $204 |
DMIDX Trailing Returns
Total returns to Jul 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +14.36% |
| 1 year | +20.60% |
| 3 years (annualised) | +12.68% |
| 5 years (annualised) | +8.19% |
DMIDX Annual Returns
Calendar-year total returns of BNY Mellon Midcap Index Fund, Inc., compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jul) | +14.36% |
| 2025 | +7.19% |
| 2024 | +13.70% |
| 2023 | +16.20% |
| 2022 | −13.32% |
| 2021 | +24.49% |
| 2020 | +13.38% |
| 2019 (Aug–Dec) | +5.59% |
DMIDX 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% | +2.4% | +3.5% | −2.3% | — | — | — | — | — |
| 2025 | +3.8% | −4.4% | −5.5% | −2.3% | +5.4% | +3.5% | +1.6% | +3.4% | +0.4% | −0.5% | +2.0% | +0.1% |
| 2024 | −1.7% | +5.9% | +5.6% | −6.0% | +4.4% | −1.6% | +5.8% | −0.1% | +1.1% | −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% | −9.7% | +10.9% | −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% | +5.9% | −3.0% | +5.1% |
| 2020 | −2.6% | −9.5% | −20.3% | +14.2% | +7.3% | +1.2% | +4.6% | +3.5% | −3.3% | +2.1% | +14.3% | +6.5% |
| 2019 | — | — | — | — | — | — | — | −4.2% | +3.1% | +1.1% | +3.0% | +2.8% |
DMIDX Risk
Risk measures from monthly returns over Aug 2023 – Jul 2026.
- 3-year volatility (annualised): 15.89%
- 3-year Sharpe ratio: 0.52 (vs 4.5% risk-free rate)
- Best month: +8.80% (Nov 2024)
- Worst month: −7.14% (Dec 2024)
DMIDX Fund Flows
Monthly money in and out of BNY Mellon Midcap Index Fund, Inc., from SEC Form N-PORT.
- 12-month net flow: −$203.5M
- 12-month gross sales (incl. reinvestments): $223.9M
- Sales ÷ redemptions: 0.52×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jul 2026 | $6.7M | $22.4M | −$15.7M |
| Jun 2026 | $6.4M | $22.5M | −$16.1M |
| May 2026 | $6.5M | $105.3M | −$98.9M |
| Apr 2026 | $6.7M | $21.3M | −$14.6M |
| Mar 2026 | $6.7M | $26.9M | −$20.2M |
| Feb 2026 | $6.5M | $22.3M | −$15.8M |
| Jan 2026 | $7.9M | $39.5M | −$31.6M |
| Dec 2025 | $149.7M | $53.6M | $96.1M |
| Nov 2025 | $7.4M | $28.0M | −$20.5M |
| Oct 2025 | $6.4M | $34.4M | −$28.0M |
| Sep 2025 | $6.6M | $26.6M | −$20.0M |
| Aug 2025 | $6.3M | $24.6M | −$18.3M |
DMIDX Assets Under Management
Net assets of BNY Mellon Midcap Index Fund, Inc. by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-07-31 | $1.30B |
| 2026-04-30 | $1.39B |
| 2026-01-31 | $1.36B |
| 2025-10-31 | $1.38B |
| 2025-07-31 | $1.40B |
| 2025-04-30 | $1.31B |
| 2025-01-31 | $1.55B |
| 2024-10-31 | $1.56B |
| 2024-07-31 | $1.62B |
| 2024-04-30 | $1.57B |
| 2024-01-31 | $1.55B |
| 2023-10-31 | $1.42B |
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.