FLXSX Performance — Fidelity Flex Small Cap Index Fund
Data updated: 2026-09-23
FLXSX returned +18.60% year to date and +33.11% over one year to Jul 2026. Annualised returns are +14.80% over 3 years and +7.01% over 5 years. The fund beat its US Small Blend category average: $100 invested three years ago grew to $151, against $146 for the category, and to $133 over one year, against $129. Volatility over the past three years was 20.20% a year. In the 12 months to Jul 2026 the fund lost a net $208.6M, and assets reached $426.05M.
FLXSX Growth of $100
What $100 invested in Fidelity Flex Small Cap Index Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the US Small Blend category average over the same months.
| Period | FLXSX | Category average |
|---|---|---|
| 1 year (Aug 2025 – Jul 2026) | $133 | $129 |
| 3 years (Aug 2023 – Jul 2026) | $151 | $146 |
| 5 years (Aug 2021 – Jul 2026) | $140 | $141 |
| Since data start (Aug 2019 – Jul 2026) | $204 | $204 |
FLXSX Trailing Returns
Total returns to Jul 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +18.60% |
| 1 year | +33.11% |
| 3 years (annualised) | +14.80% |
| 5 years (annualised) | +7.01% |
FLXSX Annual Returns
Calendar-year total returns of Fidelity Flex Small Cap Index Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jul) | +18.60% |
| 2025 | +12.02% |
| 2024 | +11.65% |
| 2023 | +17.12% |
| 2022 | −20.29% |
| 2021 | +14.86% |
| 2020 | +20.05% |
| 2019 (Aug–Dec) | +6.68% |
FLXSX 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 | +5.6% | +0.5% | −5.4% | +12.5% | +3.2% | +6.0% | −4.1% | — | — | — | — | — |
| 2025 | +2.6% | −5.4% | −6.8% | −2.4% | +5.4% | +5.4% | +1.6% | +6.7% | +2.9% | +1.8% | +0.3% | 0.0% |
| 2024 | −3.9% | +5.7% | +3.6% | −7.0% | +5.0% | −0.9% | +10.1% | −1.4% | +0.7% | −1.4% | +11.0% | −8.2% |
| 2023 | +9.8% | −1.7% | −4.8% | −1.8% | −0.9% | +8.1% | +6.1% | −5.0% | −5.9% | −6.8% | +9.0% | +12.3% |
| 2022 | −9.6% | +1.0% | +1.2% | −9.9% | +0.1% | −8.2% | +10.4% | −2.0% | −9.6% | +11.0% | +2.3% | −6.5% |
| 2021 | +5.1% | +6.2% | +1.1% | +2.1% | +0.2% | +1.9% | −3.6% | +2.2% | −3.0% | +4.3% | −4.2% | +2.2% |
| 2020 | −3.2% | −8.4% | −21.6% | +13.7% | +6.5% | +3.5% | +2.8% | +5.7% | −3.3% | +2.1% | +18.4% | +8.6% |
| 2019 | — | — | — | — | — | — | — | −5.0% | +2.1% | +2.7% | +4.2% | +2.9% |
FLXSX Risk
Risk measures from monthly returns over Aug 2023 – Jul 2026.
- 3-year volatility (annualised): 20.20%
- 3-year Sharpe ratio: 0.51 (vs 4.5% risk-free rate)
- Best month: +12.51% (Apr 2026)
- Worst month: −8.22% (Dec 2024)
FLXSX Fund Flows
Monthly money in and out of Fidelity Flex Small Cap Index Fund, from SEC Form N-PORT.
- 12-month net flow: −$208.6M
- 12-month gross sales (incl. reinvestments): $191.4M
- Sales ÷ redemptions: 0.48×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jul 2026 | $16.9M | $17.2M | −$265K |
| Jun 2026 | $10.3M | $11.5M | −$1.1M |
| May 2026 | $9.2M | $12.9M | −$3.6M |
| Apr 2026 | $43.2M | $42.3M | $903K |
| Mar 2026 | $14.2M | $8.3M | $5.9M |
| Feb 2026 | $9.4M | $8.8M | $554K |
| Jan 2026 | $17.5M | $14.4M | $3.1M |
| Dec 2025 | $8.9M | $6.6M | $2.4M |
| Nov 2025 | $9.7M | $6.4M | $3.3M |
| Oct 2025 | $17.7M | $45.5M | −$27.8M |
| Sep 2025 | $7.8M | $110.0M | −$102.2M |
| Aug 2025 | $26.4M | $116.1M | −$89.7M |
FLXSX Assets Under Management
Net assets of Fidelity Flex Small Cap Index Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-07-31 | $426.05M |
| 2026-04-30 | $411.00M |
| 2026-01-31 | $375.43M |
| 2025-10-31 | $345.68M |
| 2025-07-31 | $515.19M |
| 2025-04-30 | $450.74M |
| 2025-01-31 | $450.24M |
| 2024-10-31 | $423.79M |
| 2024-07-31 | $418.62M |
| 2024-04-30 | $346.22M |
| 2024-01-31 | $318.42M |
| 2023-10-31 | $284.36M |
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.