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 Bond3.19%
United States Treasury Bond2.58%
United States Treasury Bond2.53%
United States Treasury Bond2.30%
United States Treasury Bond2.09%
United States Treasury Bond2.06%
United States Treasury Bond2.06%
United States Treasury Bond1.99%
United States Treasury Bond1.95%
United States Treasury Bond1.90%

View all FNBGX holdings

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 classAllocation
Fixed Income98.8%
Cash & Equivalents0.9%

FNBGX Performance

Total returns for FNBGX (as of 2026-08-01), from SEC filings.

PeriodTotal return
YTD-0.2%
1 year4.4%
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.

MonthNet 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 Bond3.19%
United States Treasury Bond2.58%
United States Treasury Bond2.53%
United States Treasury Bond2.30%
United States Treasury Bond2.09%
United States Treasury Bond2.06%
United States Treasury Bond2.06%
United States Treasury Bond1.99%
United States Treasury Bond1.95%
United States Treasury Bond1.90%

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.