SDSSX Performance — MFS New Discovery Value Portfolio, Service Class
Data updated: 2026-08-24
SDSSX returned +15.24% year to date and +22.21% over one year to Jun 2026. Annualised returns are +11.82% over 3 years and +6.37% over 5 years. The fund trailed its US Small Value category average: $100 invested three years ago grew to $140, against $153 for the category, and to $122 over one year, against $131. Volatility over the past three years was 17.07% a year. In the 12 months to Jun 2026 the fund lost a net $3.5M, and assets reached $46.41M.
SDSSX Growth of $100
What $100 invested in MFS New Discovery Value Portfolio grew to, compounded from monthly returns reported on SEC Form N-PORT, against the US Small Value category average over the same months.
| Period | SDSSX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $122 | $131 |
| 3 years (Jul 2023 – Jun 2026) | $140 | $153 |
| 5 years (Jul 2021 – Jun 2026) | $136 | $149 |
| Since data start (Jul 2019 – Jun 2026) | $199 | $213 |
SDSSX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +15.24% |
| 1 year | +22.21% |
| 3 years (annualised) | +11.82% |
| 5 years (annualised) | +6.37% |
SDSSX Annual Returns
Calendar-year total returns of MFS New Discovery Value Portfolio, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +15.24% |
| 2025 | +2.87% |
| 2024 | +9.18% |
| 2023 | +11.20% |
| 2022 | −11.22% |
| 2021 | +33.87% |
| 2020 | +3.72% |
| 2019 (Jul–Dec) | +12.03% |
SDSSX 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 | +5.3% | +2.4% | −5.9% | +7.8% | −0.4% | +5.9% | — | — | — | — | — | — |
| 2025 | +2.5% | −3.0% | −4.9% | −4.6% | +4.4% | +3.0% | +0.8% | +6.7% | −1.5% | −1.9% | +2.4% | −0.3% |
| 2024 | −3.2% | +2.0% | +5.3% | −4.9% | +3.1% | −1.9% | +9.2% | +0.6% | −0.1% | −0.7% | +8.7% | −7.8% |
| 2023 | +9.1% | −1.5% | −6.3% | −1.1% | −4.1% | +7.9% | +5.3% | −3.7% | −4.9% | −6.3% | +8.8% | +9.8% |
| 2022 | −3.1% | +1.5% | −0.7% | −6.9% | +2.7% | −8.8% | +7.7% | −4.6% | −10.1% | +11.9% | +5.4% | −4.2% |
| 2021 | 0.0% | +11.1% | +5.5% | +4.5% | +3.6% | −1.0% | −0.4% | +1.3% | −2.3% | +5.7% | −3.5% | +6.1% |
| 2020 | −4.8% | −10.6% | −22.7% | +15.3% | +4.3% | +0.8% | +0.5% | +4.5% | −5.6% | +3.2% | +17.7% | +7.8% |
| 2019 | — | — | — | — | — | — | +1.4% | −3.2% | +4.4% | +2.1% | +3.2% | +3.7% |
SDSSX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 17.07%
- 3-year Sharpe ratio: 0.43 (vs 4.5% risk-free rate)
- Best month: +9.78% (Dec 2023)
- Worst month: −7.81% (Dec 2024)
SDSSX Fund Flows
Monthly money in and out of MFS New Discovery Value Portfolio, from SEC Form N-PORT.
- 12-month net flow: −$3.5M
- 12-month gross sales (incl. reinvestments): $10.3M
- Sales ÷ redemptions: 0.75×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $213K | $1.0M | −$818K |
| May 2026 | $171K | $693K | −$522K |
| Apr 2026 | $130K | $1.2M | −$1.0M |
| Mar 2026 | $315K | $364K | −$49K |
| Feb 2026 | $326K | $1.3M | −$998K |
| Jan 2026 | $648K | $1.5M | −$881K |
| Dec 2025 | $242K | $754K | −$512K |
| Nov 2025 | $473K | $485K | −$12K |
| Oct 2025 | $754K | $314K | $439K |
| Sep 2025 | $463K | $1.1M | −$622K |
| Aug 2025 | $5.8M | $1.4M | $4.5M |
| Jul 2025 | $796K | $3.8M | −$3.0M |
SDSSX Assets Under Management
Net assets of MFS New Discovery Value Portfolio by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $46.41M |
| 2026-03-31 | $43.01M |
| 2025-12-31 | $44.18M |
| 2025-09-30 | $44.20M |
| 2025-06-30 | $46.30M |
| 2025-03-31 | $44.11M |
| 2024-12-31 | $46.19M |
| 2024-09-30 | $52.32M |
| 2024-06-30 | $48.63M |
| 2024-03-31 | $51.57M |
| 2023-12-31 | $49.32M |
| 2023-09-30 | $45.48M |
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.