MRGKX Performance — MFS Core Equity Fund, Class R6
Data updated: 2026-07-27
MRGKX returned +7.74% year to date and +20.73% over one year to May 2026. Annualised returns are +18.99% over 3 years and +10.85% over 5 years. Against its US Large Blend category average the fund came out ahead over three years but behind over one: $100 invested three years ago grew to $168, against $165 for the category, and to $121 over one year, against $122. Volatility over the past three years was 13.23% a year. In the 12 months to May 2026 the fund lost a net $323.5M, and assets reached $6.49B.
MRGKX Growth of $100
What $100 invested in MFS Core Equity Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the US Large Blend category average over the same months.
| Period | MRGKX | Category average |
|---|---|---|
| 1 year (Jun 2025 – May 2026) | $121 | $122 |
| 3 years (Jun 2023 – May 2026) | $168 | $165 |
| 5 years (Jun 2021 – May 2026) | $167 | $164 |
| Since data start (Sep 2019 – May 2026) | $246 | $229 |
MRGKX Trailing Returns
Total returns to May 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +7.74% |
| 1 year | +20.73% |
| 3 years (annualised) | +18.99% |
| 5 years (annualised) | +10.85% |
MRGKX Annual Returns
Calendar-year total returns of MFS Core Equity Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–May) | +7.74% |
| 2025 | +12.77% |
| 2024 | +20.48% |
| 2023 | +23.24% |
| 2022 | −16.88% |
| 2021 | +25.46% |
| 2020 | +18.95% |
| 2019 (Sep–Dec) | +9.94% |
MRGKX 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 | +1.9% | −1.0% | −4.8% | +9.3% | +2.7% | — | — | — | — | — | — | — |
| 2025 | +4.5% | −2.9% | −5.8% | −0.9% | +6.2% | +4.4% | +2.0% | +1.7% | +2.0% | +1.1% | +0.5% | −0.2% |
| 2024 | +1.1% | +5.7% | +3.3% | −4.8% | +4.3% | +2.5% | +1.5% | +2.0% | +1.4% | −0.4% | +6.3% | −3.5% |
| 2023 | +6.4% | −3.2% | +2.5% | +1.7% | −0.4% | +6.5% | +2.8% | −1.8% | −4.6% | −2.1% | +9.2% | +5.0% |
| 2022 | −5.9% | −2.0% | +2.1% | −7.9% | +0.9% | −7.5% | +8.8% | −4.2% | −8.3% | +8.2% | +4.6% | −5.2% |
| 2021 | −1.3% | +3.1% | +4.1% | +5.5% | +0.6% | +2.2% | +2.7% | +2.8% | −4.6% | +6.3% | −2.0% | +4.2% |
| 2020 | +0.6% | −8.1% | −12.4% | +12.9% | +5.0% | +1.7% | +5.1% | +7.2% | −3.8% | −2.5% | +10.7% | +4.0% |
| 2019 | — | — | — | — | — | — | — | — | +1.3% | +1.4% | +3.6% | +3.3% |
MRGKX Risk
Risk measures from monthly returns over Jun 2023 – May 2026.
- 3-year volatility (annualised): 13.23%
- 3-year Sharpe ratio: 1.10 (vs 4.5% risk-free rate)
- Best month: +9.31% (Apr 2026)
- Worst month: −5.80% (Mar 2025)
MRGKX Fund Flows
Monthly money in and out of MFS Core Equity Fund, from SEC Form N-PORT.
- 12-month net flow: −$323.5M
- 12-month gross sales (incl. reinvestments): $1.3B
- Sales ÷ redemptions: 0.81×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| May 2026 | $44.3M | $149.5M | −$105.1M |
| Apr 2026 | $46.5M | $151.8M | −$105.3M |
| Mar 2026 | $49.3M | $138.4M | −$89.1M |
| Feb 2026 | $46.6M | $149.9M | −$103.3M |
| Jan 2026 | $46.5M | $130.0M | −$83.4M |
| Dec 2025 | $811.1M | $194.5M | $616.6M |
| Nov 2025 | $41.1M | $106.9M | −$65.8M |
| Oct 2025 | $58.5M | $150.5M | −$92.1M |
| Sep 2025 | $46.3M | $145.6M | −$99.3M |
| Aug 2025 | $51.8M | $104.2M | −$52.4M |
| Jul 2025 | $53.2M | $138.4M | −$85.3M |
| Jun 2025 | $44.1M | $103.2M | −$59.1M |
MRGKX Assets Under Management
Net assets of MFS Core Equity Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-05-31 | $6.49B |
| 2026-02-28 | $6.37B |
| 2025-11-30 | $6.67B |
| 2025-08-31 | $6.69B |
| 2025-05-31 | $6.37B |
| 2025-02-28 | $6.64B |
| 2024-11-30 | $7.04B |
| 2024-08-31 | $6.98B |
| 2024-05-31 | $6.68B |
| 2024-02-29 | $6.73B |
| 2023-11-30 | $6.17B |
| 2023-08-31 | $6.14B |
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.