VBLAX — Vanguard Long-Term Bond Index Fund
Data updated: 2026-08-28
VBLAX — Vanguard Long-Term Bond Index Fund. Long Treasury / Sovereign Bond · $8.66B AUM · 0.06% expense ratio. Holdings, fees, performance and SEC filings.
VBLAX Fund Overview
VBLAX — Vanguard Long-Term Bond Index Fund is a US ETF managed by Vanguard Bond Index Funds, 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 ETF
- Manager: Vanguard Bond Index Funds
- Category: Long Treasury / Sovereign Bond
- Assets under management: $8.66B
- 1-year return: 3.9%
- Ticker: VBLAX
- SEC CIK: 0000794105
- SEC series ID: S000002562
- Share class ID: C000209800
VBLAX Holdings
Top 10 holdings of Vanguard Long-Term Bond Index Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| United States Treasury Note/Bond | 1.17% |
| United States Treasury Note/Bond | 1.15% |
| United States Treasury Note/Bond | 1.14% |
| United States Treasury Note/Bond | 1.13% |
| United States Treasury Note/Bond | 1.13% |
| United States Treasury Note/Bond | 1.10% |
| United States Treasury Note/Bond | 1.08% |
| United States Treasury Note/Bond | 1.08% |
| United States Treasury Note/Bond | 1.06% |
| United States Treasury Note/Bond | 0.97% |
VBLAX Portfolio Allocation
Asset-class allocation of Vanguard Long-Term Bond Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 98.8% |
| Cash & Equivalents | 0.1% |
VBLAX Performance
Total returns for VBLAX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 0.9% |
| 1 year | 3.9% |
| 3 years (annualised) | 1.9% |
| 5 years (annualised) | -3.9% |
VBLAX Risk Information
Risk metrics for VBLAX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 6.4%
VBLAX Costs and Fees
VBLAX costs about $6 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.06%
- Gross expense ratio: 0.06%
- Portfolio turnover: 24%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
VBLAX Cashflows
Over the 12 months to 2026-06, Vanguard Long-Term Bond Index Fund had net inflows of $338.45M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | $124.41M |
| 2026-05 | −$9.73M |
| 2026-04 | −$129.74M |
| 2026-03 | $177.16M |
| 2026-02 | −$10.46M |
| 2026-01 | $91.31M |
VBLAX Debt Constituents
Largest debt holdings of Vanguard Long-Term Bond Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| United States Treasury Note/Bond | 1.17% |
| United States Treasury Note/Bond | 1.15% |
| United States Treasury Note/Bond | 1.14% |
| United States Treasury Note/Bond | 1.13% |
| United States Treasury Note/Bond | 1.13% |
| United States Treasury Note/Bond | 1.10% |
| United States Treasury Note/Bond | 1.08% |
| United States Treasury Note/Bond | 1.08% |
| United States Treasury Note/Bond | 1.06% |
| United States Treasury Note/Bond | 0.97% |
VBLAX Prospectus and SEC Filings
Official Vanguard Long-Term Bond Index Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-04-28
- Prospectus (485BPOS) — filed 2025-04-29
- Prospectus supplement (497) — filed 2026-02-02
- Portfolio holdings (N-PORT) — filed 2026-08-28
- Portfolio holdings (N-PORT) — filed 2026-05-28
- Portfolio holdings (N-PORT) — filed 2026-02-26
- Annual census (N-CEN) — filed 2026-03-12
- Annual census (N-CEN) — filed 2025-03-13
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.