FBLTX Performance — Fidelity SAI Long-Term Treasury Bond Index Fund
Data updated: 2026-07-24
FBLTX returned −0.23% year to date and +4.01% over one year to May 2026. Annualised returns are −1.86% over 3 years and −6.08% over 5 years. The fund trailed its Long-Term Government Bond category average: $100 invested three years ago grew to $95, against $104 for the category, and to $104 over one year, against $106. Volatility over the past three years was 13.78% a year. In the 12 months to May 2026 the fund took in a net $9.7B, and assets reached $13.01B.
FBLTX Growth of $100
What $100 invested in Fidelity SAI Long-Term Treasury Bond Index Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Long-Term Government Bond category average over the same months.
| Period | FBLTX | Category average |
|---|---|---|
| 1 year (Jun 2025 – May 2026) | $104 | $106 |
| 3 years (Jun 2023 – May 2026) | $95 | $104 |
| 5 years (Jun 2021 – May 2026) | $73 | $86 |
| Since data start (Sep 2019 – May 2026) | $71 | $89 |
FBLTX Trailing Returns
Total returns to May 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | −0.23% |
| 1 year | +4.01% |
| 3 years (annualised) | −1.86% |
| 5 years (annualised) | −6.08% |
FBLTX Annual Returns
Calendar-year total returns of Fidelity SAI Long-Term Treasury Bond Index Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–May) | −0.23% |
| 2025 | +4.38% |
| 2024 | −7.78% |
| 2023 | +2.70% |
| 2022 | −31.38% |
| 2021 | −4.60% |
| 2020 | +18.36% |
| 2019 (Sep–Dec) | −7.14% |
FBLTX 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 | −0.1% | +4.5% | −4.1% | −0.9% | +0.5% | — | — | — | — | — | — | — |
| 2025 | +0.5% | +5.7% | −1.2% | −1.4% | −3.2% | +2.6% | −1.0% | −0.1% | +3.6% | +1.4% | +0.3% | −2.5% |
| 2024 | −2.2% | −2.2% | +0.9% | −6.5% | +3.0% | +1.8% | +3.6% | +2.2% | +1.9% | −5.4% | +1.9% | −6.2% |
| 2023 | +7.5% | −4.9% | +4.8% | +0.5% | −3.1% | +0.3% | −2.4% | −3.1% | −8.0% | −5.5% | +9.9% | +8.6% |
| 2022 | −3.9% | −1.7% | −5.4% | −9.5% | −2.3% | −1.4% | +2.6% | −4.7% | −8.1% | −6.3% | +7.2% | −2.5% |
| 2021 | −3.5% | −5.7% | −5.2% | +2.4% | +0.1% | +4.3% | +3.7% | −0.3% | −2.9% | +2.4% | +2.7% | −2.0% |
| 2020 | +7.6% | +6.8% | +6.9% | +1.0% | −2.0% | +0.4% | +4.4% | −5.0% | +0.8% | −3.4% | +1.6% | −1.3% |
| 2019 | — | — | — | — | — | — | — | — | −2.6% | −1.1% | −0.4% | −3.2% |
FBLTX Risk
Risk measures from monthly returns over Jun 2023 – May 2026.
- 3-year volatility (annualised): 13.78%
- 3-year Sharpe ratio: -0.46 (vs 4.5% risk-free rate)
- Best month: +9.92% (Nov 2023)
- Worst month: −8.01% (Sep 2023)
FBLTX Fund Flows
Monthly money in and out of Fidelity SAI Long-Term Treasury Bond Index Fund, from SEC Form N-PORT.
- 12-month net flow: $9.7B
- 12-month gross sales (incl. reinvestments): $10.6B
- Sales ÷ redemptions: 11.44×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| May 2026 | $1.3B | $93.1M | $1.2B |
| Apr 2026 | $2.6B | $118.9M | $2.5B |
| Mar 2026 | $326.4M | $143.4M | $183.0M |
| Feb 2026 | $545.7M | $164.2M | $381.5M |
| Jan 2026 | $666.9M | $93.1M | $573.8M |
| Dec 2025 | $2.8B | $56.8M | $2.7B |
| Nov 2025 | $116.6M | $56.5M | $60.1M |
| Oct 2025 | $163.7M | $32.9M | $130.8M |
| Sep 2025 | $1.3B | $22.5M | $1.3B |
| Aug 2025 | $67.7M | $21.6M | $46.0M |
| Jul 2025 | $158.6M | $17.7M | $140.9M |
| Jun 2025 | $619.5M | $109.4M | $510.1M |
FBLTX Assets Under Management
Net assets of Fidelity SAI Long-Term Treasury Bond Index Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-05-31 | $13.01B |
| 2026-02-28 | $9.75B |
| 2025-11-30 | $5.90B |
| 2025-08-31 | $4.20B |
| 2025-05-31 | $3.49B |
| 2025-02-28 | $3.05B |
| 2024-11-30 | $3.09B |
| 2024-08-31 | $3.29B |
| 2024-05-31 | $3.11B |
| 2024-02-29 | $3.33B |
| 2023-11-30 | $4.39B |
| 2023-08-31 | $3.44B |
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.