BRXBX Performance — MFS Blended Research International Equity Fund, Class B
Data updated: 2026-07-27
BRXBX returned +15.50% year to date and +38.25% over one year to May 2026. Annualised returns are +24.39% over 3 years and +11.40% over 5 years. The fund beat its International Large Blend category average: $100 invested three years ago grew to $192, against $161 for the category, and to $138 over one year, against $122. Volatility over the past three years was 12.45% a year. In the 12 months to May 2026 the fund took in a net $3.0B, and assets reached $4.79B.
BRXBX Growth of $100
What $100 invested in MFS Blended Research International Equity Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the International Large Blend category average over the same months.
| Period | BRXBX | Category average |
|---|---|---|
| 1 year (Jun 2025 – May 2026) | $138 | $122 |
| 3 years (Jun 2023 – May 2026) | $192 | $161 |
| 5 years (Jun 2021 – May 2026) | $172 | $144 |
| Since data start (Sep 2019 – May 2026) | $235 | $194 |
BRXBX Trailing Returns
Total returns to May 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +15.50% |
| 1 year | +38.25% |
| 3 years (annualised) | +24.39% |
| 5 years (annualised) | +11.40% |
BRXBX Annual Returns
Calendar-year total returns of MFS Blended Research International Equity Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–May) | +15.50% |
| 2025 | +38.58% |
| 2024 | +10.66% |
| 2023 | +13.21% |
| 2022 | −14.23% |
| 2021 | +12.27% |
| 2020 | +7.98% |
| 2019 (Sep–Dec) | +12.89% |
BRXBX 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 | +6.6% | +4.4% | −8.6% | +7.2% | +5.9% | — | — | — | — | — | — | — |
| 2025 | +4.1% | +1.4% | +0.7% | +3.4% | +5.3% | +4.7% | −0.1% | +3.2% | +3.4% | +1.8% | +2.1% | +3.2% |
| 2024 | −1.1% | +2.6% | +4.0% | −1.4% | +4.9% | −0.6% | +3.5% | +2.7% | +1.9% | −4.0% | 0.0% | −1.8% |
| 2023 | +9.2% | −4.4% | +1.9% | +2.0% | −4.0% | +4.3% | +2.9% | −3.6% | −3.1% | −3.9% | +7.1% | +5.4% |
| 2022 | −2.1% | −3.2% | +0.2% | −5.8% | +1.6% | −9.4% | +4.2% | −4.5% | −9.2% | +4.5% | +13.2% | −2.5% |
| 2021 | +0.6% | +2.3% | +3.1% | +2.6% | +3.4% | −0.8% | −1.2% | +1.6% | −3.5% | +2.7% | −3.6% | +4.9% |
| 2020 | −3.8% | −6.6% | −14.9% | +5.7% | +3.9% | +4.1% | +4.0% | +3.3% | −1.7% | −1.9% | +12.0% | +6.4% |
| 2019 | — | — | — | — | — | — | — | — | +3.5% | +3.1% | +1.0% | +4.8% |
BRXBX Risk
Risk measures from monthly returns over Jun 2023 – May 2026.
- 3-year volatility (annualised): 12.45%
- 3-year Sharpe ratio: 1.60 (vs 4.5% risk-free rate)
- Best month: +7.22% (Apr 2026)
- Worst month: −8.59% (Mar 2026)
BRXBX Fund Flows
Monthly money in and out of MFS Blended Research International Equity Fund, from SEC Form N-PORT.
- 12-month net flow: $3.0B
- 12-month gross sales (incl. reinvestments): $3.7B
- Sales ÷ redemptions: 5.46×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| May 2026 | $426.0M | $85.7M | $340.3M |
| Apr 2026 | $552.3M | $155.8M | $396.5M |
| Mar 2026 | $346.4M | $93.5M | $252.9M |
| Feb 2026 | $455.8M | $62.5M | $393.2M |
| Jan 2026 | $510.9M | $72.0M | $438.9M |
| Dec 2025 | $295.4M | $53.1M | $242.3M |
| Nov 2025 | $149.5M | $35.4M | $114.1M |
| Oct 2025 | $260.4M | $33.1M | $227.3M |
| Sep 2025 | $335.5M | $17.7M | $317.7M |
| Aug 2025 | $112.9M | $18.3M | $94.6M |
| Jul 2025 | $162.4M | $24.9M | $137.5M |
| Jun 2025 | $59.6M | $19.6M | $40.0M |
BRXBX Assets Under Management
Net assets of MFS Blended Research International Equity Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-05-31 | $4.79B |
| 2026-02-28 | $3.59B |
| 2025-11-30 | $2.22B |
| 2025-08-31 | $1.42B |
| 2025-05-31 | $1.06B |
| 2025-02-28 | $878.91M |
| 2024-11-30 | $754.81M |
| 2024-08-31 | $709.33M |
| 2024-05-31 | $702.53M |
| 2024-02-29 | $678.45M |
| 2023-11-30 | $635.50M |
| 2023-08-31 | $620.73M |
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.