VTBIX — Vanguard Total Bond Market II Index Fund, Investor Shares
Data updated: 2026-08-28
VTBIX — Vanguard Total Bond Market II Index Fund, Investor Shares. 0.09% expense ratio · no sales load. Holdings, fees, performance and SEC filings.
VTBIX Fund Overview
VTBIX — Vanguard Total Bond Market II Index Fund, Investor Shares is a US mutual fund managed by The Vanguard Group, Inc., categorised as Intermediate Core Bond. VTBIX tracks the Bloomberg U.S. Aggregate Float Adjusted Index. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund (index fund)
- Adviser: The Vanguard Group, Inc.
- Trust: Vanguard Bond Index Funds
- Category: Intermediate Core Bond
- Benchmark: Bloomberg U.S. Aggregate Float Adjusted Index
- Inception date: January 26, 2009
- Assets under management: $384.36B
- 1-year return: 3.6%
- Ticker: VTBIX
- SEC CIK: 0000794105
- SEC series ID: S000025158
- Share class ID: C000075027
- CUSIP: 92203C105
- ISIN: US92203C1053
- FIGI: BBG001M6NNQ5
- LEI: E3F24BZCDA1UXGFMYX67
About VTBIX
Vanguard Total Bond Market II Index Fund (VTBIX) seeks to track the performance of a broad, market-weighted bond index. The Fund uses an indexing approach that invests at least 80% of its net assets, plus any borrowings for investment purposes, in the bonds of the Bloomberg U.S. Aggregate Float Adjusted Index or securities with substantially identical economic characteristics. It samples the index, holding a range of securities that approximates the full index's key risk factors and characteristics. Its Investor Shares, launched January 26, 2009, cost 0.09% a year and returned 3.6% in the 12 months to June 30, 2026, based on monthly returns reported to the SEC on Form N-PORT, with 2.9% volatility.
VTBIX Holdings
Top 10 holdings of Vanguard Total Bond Market II Index Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Vanguard Cmt Funds-Vanguard Market Liquidity Fund | 5.19% |
| United States Treasury Note/Bond | 1.55% |
| United States Treasury Note/Bond | 1.42% |
| United States Treasury Note/Bond | 0.68% |
| United States Treasury Note/Bond | 0.64% |
| United States Treasury Note/Bond | 0.57% |
| United States Treasury Note/Bond | 0.38% |
| United States Treasury Note/Bond | 0.37% |
| United States Treasury Note/Bond | 0.37% |
| United States Treasury Note/Bond | 0.37% |
VTBIX Portfolio Allocation
Asset-class allocation of Vanguard Total Bond Market II Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 77.6% |
| Securitized | 21.2% |
| Cash & Equivalents | 5.2% |
VTBIX Performance
Total returns for VTBIX through June 2026, from SEC filings.
| Period | Total return |
|---|---|
| YTD | 0.63% |
| 1 year | 3.60% |
| 3 years (annualised) | 4.06% |
| 5 years (annualised) | 0.00% |
VTBIX Risk Information
Risk metrics for VTBIX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 2.92%
VTBIX Costs and Fees
VTBIX costs about $9 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.09%
- Gross expense ratio: 0.09%
- Portfolio turnover: 107%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
VTBIX Cashflows
Over the 12 months to 2026-06, Vanguard Total Bond Market II Index Fund had net inflows of $71.69B, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | $3.17B |
| 2026-05 | $10.95B |
| 2026-04 | $4.07B |
| 2026-03 | $1.83B |
| 2026-02 | $5.75B |
| 2026-01 | $12.80B |
VTBIX Debt Constituents
Largest debt holdings of Vanguard Total Bond Market II Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| United States Treasury Note/Bond | 1.55% |
| United States Treasury Note/Bond | 1.42% |
| United States Treasury Note/Bond | 0.68% |
| United States Treasury Note/Bond | 0.64% |
| United States Treasury Note/Bond | 0.57% |
| United States Treasury Note/Bond | 0.38% |
| United States Treasury Note/Bond | 0.37% |
| United States Treasury Note/Bond | 0.37% |
| United States Treasury Note/Bond | 0.37% |
| United States Treasury Note/Bond | 0.36% |
VTBIX Prospectus and SEC Filings
Official Vanguard Total Bond Market II 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 (485BPOS) — filed 2024-04-26
- 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
VTBIX Service Providers
Firms that manage, distribute, hold, administer and audit Vanguard Total Bond Market II Index Fund, as reported on SEC Form N-CEN, fiscal year ending December 31, 2025.
- Adviser: The Vanguard Group, Inc.
- Distributor: Vanguard Marketing Corp.
- Custodian: JPMorgan Chase Bank NA
- Transfer agent: The Vanguard Group, Inc.
- Administrator: The Vanguard Group, Inc.
- Auditor: Pricewaterhousecoopers Llp
Related Funds
Other Intermediate Core Bond funds tracked on ABC INVEST:
VTBIX: Frequently Asked Questions
What is the expense ratio of Vanguard Total Bond Market II Index Fund (VTBIX)?
VTBIX has a net expense ratio of 0.09%, about $9 a year for every $10,000 invested. VTBIX fees and costs
Does VTBIX charge a sales load?
No. This share class (VTBIX) charges no sales load.
What index does VTBIX track?
VTBIX is an index fund that tracks the Bloomberg U.S. Aggregate Float Adjusted Index.
What are VTBIX's top holdings?
As of June 30, 2026, VTBIX held 15,856 positions. The largest are Vanguard Cmt Funds-Vanguard Market Liquidity Fund (5.19%), United States Treasury Note/Bond (1.55%), United States Treasury Note/Bond (1.42%), United States Treasury Note/Bond (0.68%) and United States Treasury Note/Bond (0.64%). All VTBIX holdings
Can I download the full list of VTBIX holdings?
Yes. The complete VTBIX holdings list as of June 30, 2026 can be downloaded as a CSV file from the Holdings page: holding, ticker, FIGI, sector, country, asset type, shares, value and share of net assets, from the fund's SEC N-PORT filing. Download VTBIX holdings (CSV)
How has Vanguard Total Bond Market II Index Fund performed?
VTBIX returned +3.6% over the 12 months to June 2026, +4.1% a year over 3 years and 0.0% a year over 5 years. VTBIX performance and risk
How large is VTBIX?
VTBIX manages $384.36B (SEC N-PORT, June 2026). Investors added a net $71.69B over the past 12 months.
Who manages VTBIX and when did it launch?
VTBIX is managed by The Vanguard Group, Inc.. It is a series of Vanguard Bond Index Funds. It launched on January 26, 2009.
How does VTBIX compare with similar Intermediate Core Bond funds?
Among 260 Intermediate Core Bond funds with $100M+ in assets, VTBIX ranks #32 of 259 on net expense ratio (0.09%) and #2 of 260 by assets. The largest is Vanguard Total Bond Market Index Fund (BND). Compare VTBIX with BND
Where can I find VTBIX's prospectus and SEC filings?
VTBIX's latest prospectus (485BPOS) was filed April 28, 2026 and its latest N-PORT holdings report was filed August 28, 2026. All 52 filings are linked on ABC INVEST and on SEC EDGAR (series S000025158). VTBIX SEC filings
What is the CUSIP and ISIN of VTBIX?
Vanguard Total Bond Market II Index Fund (VTBIX) has CUSIP 92203C105 and ISIN US92203C1053. These codes identify this share class (Investor Shares); each of the fund's 2 share classes has its own. Brokers and trading platforms use these codes to look up the fund.
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, and annual data from Form N-CEN.
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.