FUTBX — Fidelity SAI U.S. Treasury Bond Index Fund
Data updated: 2026-07-24
FUTBX — Fidelity SAI U.S. Treasury Bond Index Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Intermediate Treasury / Sovereign Bond · $8.79B AUM · 0.03% expense ratio · 3.7% 1-yr return. From SEC regulatory filings.
FUTBX Fund Overview
FUTBX — Fidelity SAI U.S. Treasury Bond Index Fund is a US mutual fund managed by Fidelity Salem Street Trust, categorised as Intermediate Treasury / Sovereign Bond. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Fidelity Salem Street Trust
- Category: Intermediate Treasury / Sovereign Bond
- Assets under management: $8.79B
- 1-year return: 3.7%
- Ticker: FUTBX
- SEC CIK: 0000035315
- SEC series ID: S000052911
- Share class ID: C000166451
FUTBX Holdings
Top 10 holdings of Fidelity SAI U.S. Treasury Bond Index Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Ust Notes | 2.04% |
| Ust Notes | 1.77% |
| Ust Notes | 1.68% |
| United States Treasury Bond | 1.64% |
| Ust Notes | 1.57% |
| Ust Notes | 1.54% |
| United States Treasury Bond | 1.43% |
| Ust Notes | 1.38% |
| Ust Notes | 1.34% |
| Ust Notes | 1.32% |
FUTBX Portfolio Allocation
Asset-class allocation of Fidelity SAI U.S. Treasury Bond Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 98.9% |
| Cash & Equivalents | 0.6% |
FUTBX Performance
Total returns for FUTBX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 0.2% |
| 1 year | 3.7% |
| 3 years (annualised) | 2.8% |
| 5 years (annualised) | -0.3% |
FUTBX Risk Information
Risk metrics for FUTBX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 3.3%
FUTBX Costs and Fees
FUTBX costs about $3 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.03%
- Gross expense ratio: 0.04%
- Portfolio turnover: 26%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
FUTBX Cashflows
Over the 12 months to 2026-02, Fidelity SAI U.S. Treasury Bond Index Fund had net outflows of $1.58B, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-02 | $5.73M |
| 2026-01 | −$5.60M |
| 2025-12 | −$677.81M |
| 2025-11 | −$187.27M |
| 2025-10 | −$3.01M |
| 2025-09 | −$36.27M |
FUTBX Debt Constituents
Largest debt holdings of Fidelity SAI U.S. Treasury Bond Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Ust Notes | 2.04% |
| Ust Notes | 1.77% |
| Ust Notes | 1.68% |
| United States Treasury Bond | 1.64% |
| Ust Notes | 1.57% |
| Ust Notes | 1.54% |
| United States Treasury Bond | 1.43% |
| Ust Notes | 1.38% |
| Ust Notes | 1.34% |
| Ust Notes | 1.32% |
FUTBX Prospectus and SEC Filings
Official Fidelity SAI U.S. Treasury Bond Index Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other Intermediate Treasury / Sovereign Bond funds tracked on ABC INVEST:
Data Sources
ABC INVEST compiles this page from public filings made to the U.S. Securities and Exchange Commission (SEC) through EDGAR: portfolio holdings and monthly cashflows from Form N-PORT, expenses and returns from fund prospectuses (Form 485BPOS) and the SEC DERA Risk/Return Summary data sets, annual data from Form N-CEN, and shareholder reports from Form N-CSR.