IISTX Performance — Voya Index Solution 2055 Portfolio, Class S2
Data updated: 2026-08-21
IISTX returned +11.37% year to date and +22.50% over one year to Jun 2026. Annualised returns are +17.90% over 3 years and +9.50% over 5 years. The fund beat its Target-Date category average: $100 invested three years ago grew to $164, against $150 for the category, and to $123 over one year, against $118. Volatility over the past three years was 12.14% a year. In the 12 months to Jun 2026 the fund lost a net $24.2M, and assets reached $1.11B.
IISTX Growth of $100
What $100 invested in Voya Index Solution 2055 Portfolio grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Target-Date category average over the same months.
| Period | IISTX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $123 | $118 |
| 3 years (Jul 2023 – Jun 2026) | $164 | $150 |
| 5 years (Jul 2021 – Jun 2026) | $157 | $143 |
| Since data start (Jul 2019 – Jun 2026) | $206 | $187 |
IISTX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +11.37% |
| 1 year | +22.50% |
| 3 years (annualised) | +17.90% |
| 5 years (annualised) | +9.50% |
IISTX Annual Returns
Calendar-year total returns of Voya Index Solution 2055 Portfolio, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +11.37% |
| 2025 | +20.20% |
| 2024 | +14.90% |
| 2023 | +19.84% |
| 2022 | −18.69% |
| 2021 | +17.43% |
| 2020 | +16.94% |
| 2019 (Jul–Dec) | +0.08% |
IISTX 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 | +3.0% | +1.6% | −6.3% | +8.9% | +4.4% | −0.1% | — | — | — | — | — | — |
| 2025 | +3.2% | −0.2% | −3.6% | +0.4% | +5.2% | +4.3% | +0.9% | +2.8% | +3.2% | +1.8% | +0.3% | +0.7% |
| 2024 | 0.0% | +4.2% | +3.1% | −4.0% | +4.4% | +1.6% | +2.1% | +2.4% | +1.8% | −2.3% | +4.1% | −3.0% |
| 2023 | +7.2% | −3.1% | +2.7% | +0.9% | −1.1% | +5.7% | +3.3% | −2.9% | −4.4% | −2.9% | +8.8% | +5.3% |
| 2022 | −4.8% | −2.8% | +1.5% | −7.8% | +0.4% | −7.9% | +6.9% | −3.9% | −9.5% | +6.2% | +7.6% | −4.5% |
| 2021 | −0.3% | +2.7% | +2.6% | +3.9% | +1.4% | +1.0% | +0.5% | +2.4% | −4.1% | +5.0% | −2.3% | +3.9% |
| 2020 | 0.0% | −0.1% | −0.1% | +0.1% | 0.0% | 0.0% | 0.0% | +0.1% | 0.0% | 0.0% | +11.7% | +4.7% |
| 2019 | — | — | — | — | — | — | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% |
IISTX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 12.14%
- 3-year Sharpe ratio: 1.10 (vs 4.5% risk-free rate)
- Best month: +8.94% (Apr 2026)
- Worst month: −6.30% (Mar 2026)
IISTX Fund Flows
Monthly money in and out of Voya Index Solution 2055 Portfolio, from SEC Form N-PORT.
- 12-month net flow: −$24.2M
- 12-month gross sales (incl. reinvestments): $97.6M
- Sales ÷ redemptions: 0.80×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $6.6M | $6.0M | $637K |
| May 2026 | $5.2M | $6.7M | −$1.5M |
| Apr 2026 | $6.8M | $10.2M | −$3.4M |
| Mar 2026 | $9.7M | $9.9M | −$150K |
| Feb 2026 | $6.4M | $17.6M | −$11.2M |
| Jan 2026 | $5.0M | $13.3M | −$8.2M |
| Dec 2025 | $7.8M | $14.5M | −$6.8M |
| Nov 2025 | $6.5M | $8.9M | −$2.5M |
| Oct 2025 | $5.5M | $11.6M | −$6.2M |
| Sep 2025 | $7.3M | $8.9M | −$1.6M |
| Aug 2025 | $22.7M | $6.2M | $16.6M |
| Jul 2025 | $8.2M | $8.0M | $137K |
IISTX Assets Under Management
Net assets of Voya Index Solution 2055 Portfolio by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $1.11B |
| 2026-03-31 | $979.24M |
| 2025-12-31 | $1.02B |
| 2025-09-30 | $1.00B |
| 2025-06-30 | $937.92M |
| 2025-03-31 | $854.66M |
| 2024-12-31 | $861.91M |
| 2024-09-30 | $899.84M |
| 2024-06-30 | $848.22M |
| 2024-03-31 | $828.53M |
| 2023-12-31 | $766.86M |
| 2023-09-30 | $678.99M |
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.