ECGRX Performance — MFS Mid Cap Growth Fund, Class 529C
Data updated: 2026-07-23
ECGRX returned −4.13% over one year to Feb 2022. Over one year the fund beat its US Mid-Cap Growth category average: $100 grew to $96, against $94 for the category. Volatility over the past 12 months was 20.41% a year. In the 12 months to May 2026 the fund took in a net $68.2M, and assets reached $13.78B.
ECGRX Growth of $100
What $100 invested in MFS Mid Cap Growth Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the US Mid-Cap Growth category average over the same months.
| Period | ECGRX | Category average |
|---|---|---|
| 1 year (Mar 2021 – Feb 2022) | $96 | $94 |
| Since data start (Sep 2019 – Feb 2022) | $132 | $142 |
ECGRX Trailing Returns
Total returns to Feb 2022, from SEC N-PORT.
| Period | Total return |
|---|---|
| 1 year | −4.13% |
| 3 years (annualised) | +11.78% |
ECGRX Annual Returns
Calendar-year total returns of MFS Mid Cap Growth Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2022 (Jan–Feb) | −16.79% |
| 2021 | +12.85% |
| 2020 | +34.32% |
| 2019 (Sep–Dec) | +4.74% |
ECGRX 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | −14.2% | −3.0% | — | — | — | — | — | — | — | — | — | — |
| 2021 | −2.5% | +0.4% | −0.6% | +5.9% | −2.3% | +4.1% | +3.9% | +3.1% | −4.8% | +6.5% | −3.8% | +3.0% |
| 2020 | +2.9% | −6.3% | −13.2% | +12.4% | +10.2% | +1.5% | +7.5% | +3.1% | +0.3% | −1.7% | +9.8% | +6.3% |
| 2019 | — | — | — | — | — | — | — | — | −1.2% | +0.4% | +4.5% | +1.1% |
ECGRX Risk
Risk measures from monthly returns over Mar 2021 – Feb 2022.
- 1-year volatility (annualised): 20.41%
- Best month: +6.53% (Oct 2021)
- Worst month: −14.22% (Jan 2022)
ECGRX Fund Flows
Monthly money in and out of MFS Mid Cap Growth Fund, from SEC Form N-PORT.
- 12-month net flow: $68.2M
- 12-month gross sales (incl. reinvestments): $4.8B
- Sales ÷ redemptions: 1.01×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| May 2026 | $156.4M | $317.8M | −$161.5M |
| Apr 2026 | $138.8M | $287.0M | −$148.2M |
| Mar 2026 | $254.4M | $464.1M | −$209.7M |
| Feb 2026 | $177.1M | $351.9M | −$174.8M |
| Jan 2026 | $231.1M | $405.0M | −$173.9M |
| Dec 2025 | $2.1B | $447.2M | $1.7B |
| Nov 2025 | $253.4M | $373.4M | −$120.0M |
| Oct 2025 | $294.4M | $377.6M | −$83.3M |
| Sep 2025 | $361.4M | $296.0M | $65.4M |
| Aug 2025 | $260.8M | $250.8M | $10.0M |
| Jul 2025 | $411.7M | $864.4M | −$452.7M |
| Jun 2025 | $143.8M | $324.9M | −$181.2M |
ECGRX Assets Under Management
Net assets of MFS Mid Cap Growth Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-05-31 | $13.78B |
| 2026-02-28 | $13.79B |
| 2025-11-30 | $14.58B |
| 2025-08-31 | $15.19B |
| 2025-05-31 | $14.95B |
| 2025-02-28 | $14.94B |
| 2024-11-30 | $16.07B |
| 2024-08-31 | $14.72B |
| 2024-05-31 | $14.09B |
| 2024-02-29 | $14.65B |
| 2023-11-30 | $13.03B |
| 2023-08-31 | $13.08B |
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.