STSGX Performance — American Beacon Stephens Small Cap Growth Fund, Investor Class
Data updated: 2026-08-11
STSGX returned +18.18% year to date and +28.14% over one year to Jun 2026. Annualised returns are +17.59% over 3 years and +6.09% over 5 years. Against its US Small Growth category average the fund came out ahead over three years but behind over one: $100 invested three years ago grew to $163, against $156 for the category, and to $128 over one year, against $132. Volatility over the past three years was 17.43% a year. In the 12 months to Jun 2026 the fund took in a net $69.5M, and assets reached $553.45M.
STSGX Growth of $100
What $100 invested in American Beacon Stephens Small Cap Growth Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the US Small Growth category average over the same months.
| Period | STSGX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $128 | $132 |
| 3 years (Jul 2023 – Jun 2026) | $163 | $156 |
| 5 years (Jul 2021 – Jun 2026) | $134 | $127 |
| Since data start (Jul 2019 – Jun 2026) | $201 | $203 |
STSGX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +18.18% |
| 1 year | +28.14% |
| 3 years (annualised) | +17.59% |
| 5 years (annualised) | +6.09% |
STSGX Annual Returns
Calendar-year total returns of American Beacon Stephens Small Cap Growth Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +18.18% |
| 2025 | +11.50% |
| 2024 | +15.40% |
| 2023 | +19.18% |
| 2022 | −28.73% |
| 2021 | +13.92% |
| 2020 | +37.18% |
| 2019 (Jul–Dec) | −0.39% |
STSGX 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 | +3.8% | −0.5% | −5.4% | +12.1% | +4.4% | +3.3% | — | — | — | — | — | — |
| 2025 | +5.1% | −7.4% | −5.9% | +0.1% | +6.6% | +5.3% | +1.9% | +4.3% | +2.4% | +2.1% | −0.8% | −1.6% |
| 2024 | −1.9% | +9.0% | +2.4% | −5.6% | +4.0% | −0.9% | +3.5% | +2.1% | +0.6% | −1.6% | +10.0% | −5.9% |
| 2023 | +9.0% | −2.0% | −0.5% | −2.5% | −0.6% | +8.2% | +2.3% | −1.2% | −6.0% | −5.0% | +10.0% | +7.6% |
| 2022 | −14.1% | +0.8% | +1.0% | −10.3% | −2.8% | −7.7% | +10.3% | −3.1% | −8.1% | +8.8% | +1.3% | −6.4% |
| 2021 | +2.5% | +3.0% | −2.6% | +5.5% | −2.5% | +3.5% | +1.2% | +2.7% | −2.5% | +6.5% | −4.3% | +0.7% |
| 2020 | +0.9% | −8.9% | −15.4% | +17.8% | +12.4% | +3.9% | +5.9% | +2.5% | −4.6% | −0.5% | +12.8% | +10.4% |
| 2019 | — | — | — | — | — | — | +1.8% | −5.1% | −2.5% | −0.2% | +6.1% | −0.1% |
STSGX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 17.43%
- 3-year Sharpe ratio: 0.75 (vs 4.5% risk-free rate)
- Best month: +12.14% (Apr 2026)
- Worst month: −7.44% (Feb 2025)
STSGX Fund Flows
Monthly money in and out of American Beacon Stephens Small Cap Growth Fund, from SEC Form N-PORT.
- 12-month net flow: $69.5M
- 12-month gross sales (incl. reinvestments): $182.9M
- Sales ÷ redemptions: 1.61×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $11.9M | $6.8M | $5.2M |
| May 2026 | $17.5M | $6.7M | $10.9M |
| Apr 2026 | $8.0M | $5.5M | $2.5M |
| Mar 2026 | $15.6M | $3.9M | $11.7M |
| Feb 2026 | $17.2M | $4.5M | $12.7M |
| Jan 2026 | $10.4M | $28.6M | −$18.3M |
| Dec 2025 | $53.4M | $14.0M | $39.3M |
| Nov 2025 | $5.2M | $12.1M | −$6.8M |
| Oct 2025 | $8.5M | $7.5M | $1000K |
| Sep 2025 | $12.5M | $4.7M | $7.8M |
| Aug 2025 | $18.9M | $5.5M | $13.4M |
| Jul 2025 | $3.8M | $13.6M | −$9.9M |
STSGX Assets Under Management
Net assets of American Beacon Stephens Small Cap Growth Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $553.45M |
| 2026-03-31 | $441.09M |
| 2025-12-31 | $444.63M |
| 2025-09-30 | $450.86M |
| 2025-06-30 | $404.13M |
| 2025-03-31 | $329.09M |
| 2024-12-31 | $364.31M |
| 2024-09-30 | $350.22M |
| 2024-06-30 | $309.42M |
| 2024-03-31 | $348.79M |
| 2023-12-31 | $317.00M |
| 2023-09-30 | $285.78M |
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.