TSTFX Performance — Transamerica Stock Index, Class R4
Data updated: 2026-08-26
TSTFX returned +9.99% year to date and +21.83% over one year to Jun 2026. Annualised returns are +20.19% over 3 years and +13.04% over 5 years. The fund beat its US Large Blend category average: $100 invested three years ago grew to $174, against $157 for the category, and to $122 over one year, against $118. Volatility over the past three years was 13.06% a year. In the 12 months to Jun 2026 the fund lost a net $127.7M, and assets reached $156.87M.
TSTFX Growth of $100
What $100 invested in Transamerica Stock Index grew to, compounded from monthly returns reported on SEC Form N-PORT, against the US Large Blend category average over the same months.
| Period | TSTFX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $122 | $118 |
| 3 years (Jul 2023 – Jun 2026) | $174 | $157 |
| 5 years (Jul 2021 – Jun 2026) | $185 | $161 |
| Since data start (Jul 2019 – Jun 2026) | $278 | $229 |
TSTFX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +9.99% |
| 1 year | +21.83% |
| 3 years (annualised) | +20.19% |
| 5 years (annualised) | +13.04% |
TSTFX Annual Returns
Calendar-year total returns of Transamerica Stock Index, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +9.99% |
| 2025 | +17.47% |
| 2024 | +24.61% |
| 2023 | +25.93% |
| 2022 | −18.36% |
| 2021 | +28.23% |
| 2020 | +18.12% |
| 2019 (Jul–Dec) | +10.81% |
TSTFX 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 | +1.4% | −0.8% | −5.0% | +10.5% | +5.2% | −1.0% | — | — | — | — | — | — |
| 2025 | +2.8% | −1.4% | −5.7% | −0.7% | +6.2% | +5.1% | +2.2% | +2.0% | +3.6% | +2.3% | +0.2% | 0.0% |
| 2024 | +1.6% | +5.3% | +3.2% | −4.1% | +4.9% | +3.5% | +1.2% | +2.4% | +2.1% | −0.9% | +5.8% | −2.4% |
| 2023 | +6.3% | −2.5% | +3.7% | +1.5% | +0.4% | +6.6% | +3.1% | −1.6% | −4.8% | −2.1% | +9.1% | +4.5% |
| 2022 | −5.2% | −3.0% | +3.6% | −8.7% | +0.2% | −8.3% | +9.2% | −4.1% | −9.2% | +8.0% | +5.6% | −5.8% |
| 2021 | −1.1% | +2.7% | +4.4% | +5.3% | +0.6% | +2.3% | +2.4% | +3.0% | −4.7% | +7.0% | −0.7% | +4.5% |
| 2020 | −0.1% | −8.3% | −12.3% | +12.8% | +4.8% | +1.9% | +5.7% | +7.1% | −3.8% | −2.6% | +10.9% | +3.9% |
| 2019 | — | — | — | — | — | — | +1.4% | −1.6% | +1.8% | +2.1% | +3.6% | +3.0% |
TSTFX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 13.06%
- 3-year Sharpe ratio: 1.20 (vs 4.5% risk-free rate)
- Best month: +10.48% (Apr 2026)
- Worst month: −5.66% (Mar 2025)
TSTFX Fund Flows
Monthly money in and out of Transamerica Stock Index, from SEC Form N-PORT.
- 12-month net flow: −$127.7M
- 12-month gross sales (incl. reinvestments): $76.4M
- Sales ÷ redemptions: 0.37×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $1.2M | $1.7M | −$498K |
| May 2026 | $1.6M | $44.4M | −$42.8M |
| Apr 2026 | $1.6M | $2.0M | −$400K |
| Mar 2026 | $2.4M | $4.3M | −$1.9M |
| Feb 2026 | $2.0M | $1.1M | $904K |
| Jan 2026 | $1.2M | $7.7M | −$6.5M |
| Dec 2025 | $57.2M | $115.2M | −$58.0M |
| Nov 2025 | $1.8M | $12.9M | −$11.1M |
| Oct 2025 | $1.4M | $2.8M | −$1.5M |
| Sep 2025 | $3.0M | $2.2M | $796K |
| Aug 2025 | $511K | $6.3M | −$5.8M |
| Jul 2025 | $2.5M | $3.4M | −$934K |
TSTFX Assets Under Management
Net assets of Transamerica Stock Index by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $156.87M |
| 2026-03-31 | $174.62M |
| 2025-12-31 | $190.49M |
| 2025-09-30 | $308.28M |
| 2025-06-30 | $291.89M |
| 2025-03-31 | $267.56M |
| 2024-12-31 | $293.07M |
| 2024-09-30 | $339.95M |
| 2024-06-30 | $341.54M |
| 2024-03-31 | $357.50M |
| 2023-12-31 | $334.77M |
| 2023-09-30 | $302.31M |
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.