FNBGX — Fidelity Long-Term Treasury Bond Index Fund
Data updated: 2026-07-24
FNBGX — Fidelity Long-Term Treasury Bond Index Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Long Treasury / Sovereign Bond · $4.92B AUM · 0.03% expense ratio · 4.4% 1-yr return. From SEC regulatory filings.
FNBGX Fund Overview
FNBGX — Fidelity Long-Term Treasury Bond Index Fund is a US mutual fund managed by Fidelity Salem Street Trust, categorised as Long 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: Long Treasury / Sovereign Bond
- Assets under management: $4.92B
- 1-year return: 4.4%
- Ticker: FNBGX
- SEC CIK: 0000035315
- SEC series ID: S000017678
- Share class ID: C000194656
FNBGX Holdings
Top 10 holdings of Fidelity Long-Term Treasury Bond Index Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| United States Treasury Bond | 3.19% |
| United States Treasury Bond | 2.58% |
| United States Treasury Bond | 2.53% |
| United States Treasury Bond | 2.30% |
| United States Treasury Bond | 2.09% |
| United States Treasury Bond | 2.06% |
| United States Treasury Bond | 2.06% |
| United States Treasury Bond | 1.99% |
| United States Treasury Bond | 1.95% |
| United States Treasury Bond | 1.90% |
FNBGX Portfolio Allocation
Asset-class allocation of Fidelity Long-Term Treasury Bond Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 98.8% |
| Cash & Equivalents | 0.9% |
FNBGX Performance
Total returns for FNBGX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | -0.2% |
| 1 year | 4.4% |
| 3 years (annualised) | -0.8% |
| 5 years (annualised) | -5.1% |
FNBGX Risk Information
Risk metrics for FNBGX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 7.7%
FNBGX Costs and Fees
FNBGX costs about $3 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.03%
- Gross expense ratio: 0.03%
- Portfolio turnover: 25%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
FNBGX Cashflows
Over the 12 months to 2026-02, Fidelity Long-Term Treasury Bond Index Fund had net inflows of $447.60M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-02 | $448.65K |
| 2026-01 | $110.01M |
| 2025-12 | $129.33M |
| 2025-11 | −$25.24M |
| 2025-10 | −$91.28M |
| 2025-09 | −$129.60M |
FNBGX Debt Constituents
Largest debt holdings of Fidelity Long-Term Treasury Bond Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| United States Treasury Bond | 3.19% |
| United States Treasury Bond | 2.58% |
| United States Treasury Bond | 2.53% |
| United States Treasury Bond | 2.30% |
| United States Treasury Bond | 2.09% |
| United States Treasury Bond | 2.06% |
| United States Treasury Bond | 2.06% |
| United States Treasury Bond | 1.99% |
| United States Treasury Bond | 1.95% |
| United States Treasury Bond | 1.90% |
FNBGX Prospectus and SEC Filings
Official Fidelity Long-Term Treasury Bond Index Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other Long 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.