STBIX Performance — State Street Equity 500 Index Fund, Service Shares
Data updated: 2026-08-28
STBIX returned +10.03% year to date and +21.95% over one year to Jun 2026. Annualised returns are +20.25% over 3 years and +13.06% 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 13.04% a year. In the 12 months to Jun 2026 the fund took in a net $2.1B, and assets reached $16.38B.
STBIX Growth of $100
What $100 invested in State Street Equity 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 | STBIX | 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 |
STBIX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +10.03% |
| 1 year | +21.95% |
| 3 years (annualised) | +20.25% |
| 5 years (annualised) | +13.06% |
STBIX Annual Returns
Calendar-year total returns of State Street Equity 500 Index Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +10.03% |
| 2025 | +17.51% |
| 2024 | +24.64% |
| 2023 | +25.94% |
| 2022 | −18.35% |
| 2021 | +28.18% |
| 2020 | +18.06% |
| 2019 (Jul–Dec) | +10.73% |
STBIX 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% | −1.3% | −5.7% | −0.7% | +6.3% | +5.1% | +2.2% | +2.0% | +3.6% | +2.3% | +0.2% | 0.0% |
| 2024 | +1.7% | +5.3% | +3.2% | −4.1% | +4.9% | +3.6% | +1.2% | +2.4% | +2.1% | −0.9% | +5.8% | −2.4% |
| 2023 | +6.3% | −2.5% | +3.6% | +1.5% | +0.4% | +6.6% | +3.2% | −1.6% | −4.8% | −2.1% | +9.1% | +4.5% |
| 2022 | −5.2% | −3.0% | +3.7% | −8.7% | +0.2% | −8.3% | +9.2% | −4.1% | −9.2% | +8.1% | +5.6% | −5.8% |
| 2021 | −1.1% | +2.7% | +4.4% | +5.3% | +0.7% | +2.3% | +2.4% | +3.0% | −4.7% | +7.0% | −0.7% | +4.4% |
| 2020 | 0.0% | −8.2% | −12.4% | +12.8% | +4.7% | +1.9% | +5.6% | +7.1% | −3.8% | −2.7% | +10.9% | +3.8% |
| 2019 | — | — | — | — | — | — | +1.4% | −1.6% | +1.9% | +2.1% | +3.6% | +2.9% |
STBIX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 13.04%
- 3-year Sharpe ratio: 1.21 (vs 4.5% risk-free rate)
- Best month: +10.46% (Apr 2026)
- Worst month: −5.67% (Mar 2025)
STBIX Fund Flows
Monthly money in and out of State Street Equity 500 Index Fund, from SEC Form N-PORT.
- 12-month net flow: $2.1B
- 12-month gross sales (incl. reinvestments): $3.6B
- Sales ÷ redemptions: 2.37×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $233.5M | $155.1M | $78.5M |
| May 2026 | $522.3M | $143.6M | $378.7M |
| Apr 2026 | $403.2M | $99.1M | $304.1M |
| Mar 2026 | $303.5M | $99.6M | $204.0M |
| Feb 2026 | $270.2M | $82.1M | $188.2M |
| Jan 2026 | $308.4M | $209.3M | $99.1M |
| Dec 2025 | $444.8M | $116.1M | $328.7M |
| Nov 2025 | $185.9M | $180.9M | $5.0M |
| Oct 2025 | $313.8M | $92.0M | $221.7M |
| Sep 2025 | $199.6M | $82.3M | $117.2M |
| Aug 2025 | $222.1M | $62.4M | $159.8M |
| Jul 2025 | $158.3M | $181.5M | −$23.3M |
STBIX Assets Under Management
Net assets of State Street Equity 500 Index Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $16.38B |
| 2026-03-31 | $13.54B |
| 2025-12-31 | $13.66B |
| 2025-09-30 | $12.95B |
| 2025-06-30 | $11.74B |
| 2025-03-31 | $8.71B |
| 2024-12-31 | $8.89B |
| 2024-09-30 | $7.12B |
| 2024-06-30 | $6.45B |
| 2024-03-31 | $5.95B |
| 2023-12-31 | $5.19B |
| 2023-09-30 | $4.30B |
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.