MSSYX Performance — AMG Frontier Small Cap Growth Fund, Class Z
Data updated: 2026-09-25
MSSYX returned +13.99% year to date and +28.32% over one year to Jul 2026. Annualised returns are +11.63% over 3 years and +6.86% over 5 years. The fund trailed its Emerging Markets Equity category average: $100 invested three years ago grew to $139, against $164 for the category, and to $128 over one year, against $134. Volatility over the past three years was 21.82% a year. In the 12 months to Jul 2026 the fund lost a net $8.2M, and assets reached $93.67M.
MSSYX Growth of $100
What $100 invested in AMG Frontier Small Cap Growth Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Emerging Markets Equity category average over the same months.
| Period | MSSYX | Category average |
|---|---|---|
| 1 year (Aug 2025 – Jul 2026) | $128 | $134 |
| 3 years (Aug 2023 – Jul 2026) | $139 | $164 |
| 5 years (Aug 2021 – Jul 2026) | $139 | $143 |
| Since data start (Aug 2019 – Jul 2026) | $242 | $188 |
MSSYX Trailing Returns
Total returns to Jul 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +13.99% |
| 1 year | +28.32% |
| 3 years (annualised) | +11.63% |
| 5 years (annualised) | +6.86% |
MSSYX Annual Returns
Calendar-year total returns of AMG Frontier Small Cap Growth Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jul) | +13.99% |
| 2025 | +12.45% |
| 2024 | +10.94% |
| 2023 | +23.59% |
| 2022 | −21.42% |
| 2021 | +15.26% |
| 2020 | +39.29% |
| 2019 (Aug–Dec) | +9.33% |
MSSYX 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 | +5.4% | +3.7% | −5.6% | +10.5% | +7.2% | +3.1% | −9.6% | — | — | — | — | — |
| 2025 | +5.5% | −7.4% | −12.3% | −1.1% | +6.6% | +8.1% | +2.3% | +4.0% | +1.2% | +3.6% | +0.9% | +2.2% |
| 2024 | −1.6% | +8.5% | +3.8% | −5.5% | +5.1% | −1.2% | +3.4% | −2.0% | +1.5% | −0.8% | +10.1% | −9.1% |
| 2023 | +11.8% | −2.1% | −1.5% | −1.1% | +4.0% | +11.4% | +2.3% | −4.4% | −5.8% | −10.1% | +9.1% | +10.8% |
| 2022 | −9.5% | +1.6% | −0.3% | −10.7% | +1.8% | −8.8% | +10.6% | −1.5% | −10.6% | +8.9% | +4.5% | −6.7% |
| 2021 | +5.1% | +9.4% | −3.5% | +4.1% | +0.4% | +0.4% | −1.8% | +2.2% | −3.6% | +5.5% | −5.9% | +3.0% |
| 2020 | −2.9% | −6.7% | −24.7% | +20.8% | +11.9% | +4.5% | +3.3% | +5.1% | +2.5% | +0.5% | +19.3% | +8.4% |
| 2019 | — | — | — | — | — | — | — | −2.6% | 0.0% | +3.7% | +7.1% | +1.2% |
MSSYX Risk
Risk measures from monthly returns over Aug 2023 – Jul 2026.
- 3-year volatility (annualised): 21.82%
- 3-year Sharpe ratio: 0.33 (vs 4.5% risk-free rate)
- Best month: +10.78% (Dec 2023)
- Worst month: −12.28% (Mar 2025)
MSSYX Fund Flows
Monthly money in and out of AMG Frontier Small Cap Growth Fund, from SEC Form N-PORT.
- 12-month net flow: −$8.2M
- 12-month gross sales (incl. reinvestments): $25.9M
- Sales ÷ redemptions: 0.76×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jul 2026 | $824K | $5.7M | −$4.9M |
| Jun 2026 | $440K | $567K | −$127K |
| May 2026 | $1.5M | $1.1M | $380K |
| Apr 2026 | $1.4M | $6.3M | −$4.9M |
| Mar 2026 | $1.6M | $1.1M | $578K |
| Feb 2026 | $14.4M | $2.1M | $12.3M |
| Jan 2026 | $726K | $1.6M | −$871K |
| Dec 2025 | $3.5M | $1.3M | $2.2M |
| Nov 2025 | $363K | $1.2M | −$834K |
| Oct 2025 | $334K | $1.6M | −$1.2M |
| Sep 2025 | $108K | $9.8M | −$9.7M |
| Aug 2025 | $653K | $1.8M | −$1.1M |
MSSYX Assets Under Management
Net assets of AMG Frontier Small Cap Growth Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-07-31 | $93.67M |
| 2026-04-30 | $98.23M |
| 2026-01-30 | $82.95M |
| 2025-10-31 | $78.97M |
| 2025-07-31 | $83.92M |
| 2025-04-30 | $83.32M |
| 2025-01-31 | $101.78M |
| 2024-10-31 | $78.72M |
| 2024-07-31 | $81.52M |
| 2024-04-30 | $76.36M |
| 2024-01-31 | $71.84M |
| 2023-10-31 | $55.48M |
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.