NOSIX Performance — Stock Index Fund
Data updated: 2026-08-28
NOSIX returned +10.18% year to date and +22.25% over one year to Jun 2026. Annualised returns are +20.53% over 3 years and +13.32% over 5 years. The fund beat its US Large Blend category average: $100 invested three years ago grew to $175, 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 $802.8M, and assets reached $19.39B.
NOSIX Growth of $100
What $100 invested in Stock 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 | NOSIX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $122 | $118 |
| 3 years (Jul 2023 – Jun 2026) | $175 | $157 |
| 5 years (Jul 2021 – Jun 2026) | $187 | $161 |
| Since data start (Jul 2019 – Jun 2026) | $282 | $229 |
NOSIX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +10.18% |
| 1 year | +22.25% |
| 3 years (annualised) | +20.53% |
| 5 years (annualised) | +13.32% |
NOSIX Annual Returns
Calendar-year total returns of Stock Index Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +10.18% |
| 2025 | +17.79% |
| 2024 | +24.90% |
| 2023 | +26.21% |
| 2022 | −18.19% |
| 2021 | +28.56% |
| 2020 | +18.25% |
| 2019 (Jul–Dec) | +10.86% |
NOSIX 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 | +1.5% | −0.8% | −5.0% | +10.5% | +5.2% | −0.9% | — | — | — | — | — | — |
| 2025 | +2.8% | −1.3% | −5.6% | −0.7% | +6.3% | +5.1% | +2.2% | +2.0% | +3.7% | +2.3% | +0.2% | +0.1% |
| 2024 | +1.7% | +5.3% | +3.2% | −4.1% | +4.9% | +3.6% | +1.2% | +2.4% | +2.1% | −0.9% | +5.9% | −2.4% |
| 2023 | +6.2% | −2.4% | +3.7% | +1.6% | +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% | +0.1% | −8.2% | +9.2% | −4.1% | −9.2% | +8.1% | +5.6% | −5.8% |
| 2021 | −1.0% | +2.8% | +4.4% | +5.3% | +0.7% | +2.3% | +2.4% | +3.0% | −4.7% | +7.0% | −0.7% | +4.5% |
| 2020 | −0.1% | −8.3% | −12.4% | +12.8% | +4.8% | +2.0% | +5.6% | +7.2% | −3.8% | −2.7% | +10.9% | +3.8% |
| 2019 | — | — | — | — | — | — | +1.4% | −1.6% | +1.9% | +2.1% | +3.6% | +3.0% |
NOSIX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 13.04%
- 3-year Sharpe ratio: 1.23 (vs 4.5% risk-free rate)
- Best month: +10.48% (Apr 2026)
- Worst month: −5.64% (Mar 2025)
NOSIX Fund Flows
Monthly money in and out of Stock Index Fund, from SEC Form N-PORT.
- 12-month net flow: $802.8M
- 12-month gross sales (incl. reinvestments): $2.0B
- Sales ÷ redemptions: 1.64×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $468.3M | $115.8M | $352.5M |
| May 2026 | $58.4M | $129.9M | −$71.5M |
| Apr 2026 | $89.7M | $83.7M | $6.0M |
| Mar 2026 | $91.1M | $95.9M | −$4.8M |
| Feb 2026 | $91.2M | $91.7M | −$497K |
| Jan 2026 | $186.6M | $125.6M | $61.0M |
| Dec 2025 | $361.7M | $124.6M | $237.1M |
| Nov 2025 | $45.8M | $90.6M | −$44.8M |
| Oct 2025 | $46.6M | $122.9M | −$76.3M |
| Sep 2025 | $520.2M | $102.8M | $417.3M |
| Aug 2025 | $41.4M | $81.5M | −$40.1M |
| Jul 2025 | $47.5M | $80.5M | −$33.0M |
NOSIX Assets Under Management
Net assets of Stock Index Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $19.39B |
| 2026-03-31 | $16.63B |
| 2025-12-31 | $17.37B |
| 2025-09-30 | $17.17B |
| 2025-06-30 | $15.61B |
| 2025-03-31 | $14.54B |
| 2024-12-31 | $15.05B |
| 2024-09-30 | $14.73B |
| 2024-06-28 | $14.11B |
| 2024-03-28 | $13.29B |
| 2023-12-29 | $12.06B |
| 2023-09-29 | $10.92B |
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.