SPINX Performance — Siit S&P 500 Index Fund, Class A
Data updated: 2026-09-28
SPINX returned +12.11% year to date and +29.66% over one year to May 2026. Annualised returns are +23.52% over 3 years and +14.07% over 5 years. The fund beat its US Large Blend category average: $100 invested three years ago grew to $188, against $165 for the category, and to $130 over one year, against $122. Volatility over the past three years was 13.27% a year. In the 12 months to May 2026 the fund lost a net $284.1M, and assets reached $4.59B.
SPINX Growth of $100
What $100 invested in Siit S&P 500 Index Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the US Large Blend category average over the same months.
| Period | SPINX | Category average |
|---|---|---|
| 1 year (Jun 2025 – May 2026) | $130 | $122 |
| 3 years (Jun 2023 – May 2026) | $188 | $165 |
| 5 years (Jun 2021 – May 2026) | $193 | $164 |
| Since data start (Sep 2019 – May 2026) | $286 | $229 |
SPINX Trailing Returns
Total returns to May 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +12.11% |
| 1 year | +29.66% |
| 3 years (annualised) | +23.52% |
| 5 years (annualised) | +14.07% |
SPINX Annual Returns
Calendar-year total returns of Siit S&P 500 Index Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–May) | +12.11% |
| 2025 | +15.54% |
| 2024 | +25.43% |
| 2023 | +22.79% |
| 2022 | −8.73% |
| 2021 | +20.63% |
| 2020 | +31.53% |
| 2019 (Sep–Dec) | −1.07% |
SPINX 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% | 0.0% | +5.2% | +10.5% | −5.0% | — | — | — | — | — | — | — |
| 2025 | +2.8% | −2.4% | +6.3% | −0.7% | −5.7% | +2.0% | +2.2% | +5.1% | +0.3% | +2.3% | +3.7% | −0.8% |
| 2024 | +1.7% | +4.5% | +5.0% | −4.1% | +3.2% | +2.5% | +1.2% | +3.6% | +5.9% | −0.9% | +2.1% | −1.3% |
| 2023 | +6.3% | −5.8% | +0.4% | +1.6% | +3.6% | −1.6% | +3.2% | +6.6% | +9.1% | −2.1% | −4.8% | +5.3% |
| 2022 | −5.2% | +4.5% | +0.2% | −8.7% | +3.7% | −4.1% | +9.2% | −8.3% | +5.6% | +8.1% | −9.2% | −2.4% |
| 2021 | −1.0% | +3.8% | +0.7% | +5.3% | +4.3% | +3.0% | +2.4% | +2.3% | −0.7% | +7.0% | −4.6% | −3.0% |
| 2020 | −0.1% | +3.0% | +4.7% | +12.9% | −12.3% | +7.2% | +5.7% | +2.0% | +10.9% | −2.6% | −3.8% | +2.8% |
| 2019 | — | — | — | — | — | — | — | — | +3.6% | +2.2% | +1.8% | −8.3% |
SPINX Risk
Risk measures from monthly returns over Jun 2023 – May 2026.
- 3-year volatility (annualised): 13.27%
- 3-year Sharpe ratio: 1.43 (vs 4.5% risk-free rate)
- Best month: +10.51% (Apr 2026)
- Worst month: −5.65% (May 2025)
SPINX Fund Flows
Monthly money in and out of Siit S&P 500 Index Fund, from SEC Form N-PORT.
- 12-month net flow: −$284.1M
- 12-month gross sales (incl. reinvestments): $961.0M
- Sales ÷ redemptions: 0.77×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| May 2026 | $34.7M | $25.7M | $9.0M |
| Apr 2026 | $30.4M | $64.8M | −$34.4M |
| Mar 2026 | $40.9M | $239.8M | −$198.9M |
| Feb 2026 | $481.2M | $175.5M | $305.7M |
| Jan 2026 | $30.3M | $33.7M | −$3.5M |
| Dec 2025 | $21.7M | $27.8M | −$6.1M |
| Nov 2025 | $14.1M | $145.8M | −$131.7M |
| Oct 2025 | $37.1M | $182.3M | −$145.2M |
| Sep 2025 | $37.8M | $39.6M | −$1.8M |
| Aug 2025 | $13.5M | $58.2M | −$44.7M |
| Jul 2025 | $189.8M | $175.0M | $14.8M |
| Jun 2025 | $29.4M | $76.8M | −$47.4M |
SPINX Assets Under Management
Net assets of Siit S&P 500 Index Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-05-31 | $4.59B |
| 2026-02-28 | $4.37B |
| 2025-11-30 | $4.48B |
| 2025-08-31 | $4.50B |
| 2025-05-31 | $4.19B |
| 2025-02-28 | $4.29B |
| 2024-11-30 | $4.40B |
| 2024-08-31 | $4.35B |
| 2024-05-31 | $4.33B |
| 2024-02-29 | $4.89B |
| 2023-11-30 | $4.49B |
| 2023-08-31 | $4.60B |
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.