VTBNX Performance — Vanguard Total Bond Market II Index Fund, Institutional Shares
Data updated: 2026-08-28
VTBNX returned +0.66% year to date and +3.67% over one year to Jun 2026. Annualised returns are +4.14% over 3 years and +0.07% over 5 years. The fund trailed its Intermediate Core Bond category average: $100 invested three years ago grew to $113, against $115 for the category, and to $104 over one year, against $104. Volatility over the past three years was 5.41% a year. In the 12 months to Jun 2026 the fund took in a net $71.7B, and assets reached $384.36B.
VTBNX Growth of $100
What $100 invested in Vanguard Total Bond Market II Index Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Intermediate Core Bond category average over the same months.
| Period | VTBNX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $104 | $104 |
| 3 years (Jul 2023 – Jun 2026) | $113 | $115 |
| 5 years (Jul 2021 – Jun 2026) | $100 | $102 |
| Since data start (Jul 2019 – Jun 2026) | $109 | $112 |
VTBNX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +0.66% |
| 1 year | +3.67% |
| 3 years (annualised) | +4.14% |
| 5 years (annualised) | +0.07% |
VTBNX Annual Returns
Calendar-year total returns of Vanguard Total Bond Market II Index Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +0.66% |
| 2025 | +7.17% |
| 2024 | +1.31% |
| 2023 | +5.66% |
| 2022 | −13.12% |
| 2021 | −1.67% |
| 2020 | +7.38% |
| 2019 (Jul–Dec) | +2.48% |
VTBNX Monthly Returns
Monthly total returns as reported on SEC Form N-PORT.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +0.1% | +1.6% | −1.7% | +0.1% | +0.3% | +0.2% | — | — | — | — | — | — |
| 2025 | +0.5% | +2.1% | +0.1% | +0.3% | −0.6% | +1.5% | −0.3% | +1.2% | +1.1% | +0.6% | +0.5% | −0.2% |
| 2024 | −0.2% | −1.4% | +0.8% | −2.3% | +1.6% | +1.0% | +2.2% | +1.5% | +1.3% | −2.5% | +1.1% | −1.7% |
| 2023 | +3.1% | −2.6% | +2.7% | +0.6% | −1.1% | −0.4% | 0.0% | −0.7% | −2.4% | −1.6% | +4.5% | +3.7% |
| 2022 | −2.1% | −1.1% | −2.9% | −3.8% | +0.6% | −1.5% | +2.3% | −2.7% | −4.2% | −1.3% | +3.6% | −0.6% |
| 2021 | −0.8% | −1.5% | −1.3% | +0.9% | +0.3% | +0.8% | +1.2% | −0.2% | −0.9% | 0.0% | +0.3% | −0.4% |
| 2020 | +2.1% | +1.7% | −0.8% | +1.6% | +0.5% | +0.7% | +1.6% | −1.0% | +0.1% | −0.6% | +1.1% | +0.2% |
| 2019 | — | — | — | — | — | — | +0.2% | +2.8% | −0.6% | +0.2% | −0.1% | −0.1% |
VTBNX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 5.41%
- 3-year Sharpe ratio: -0.07 (vs 4.5% risk-free rate)
- Best month: +4.45% (Nov 2023)
- Worst month: −2.46% (Oct 2024)
VTBNX Fund Flows
Monthly money in and out of Vanguard Total Bond Market II Index Fund, from SEC Form N-PORT.
- 12-month net flow: $71.7B
- 12-month gross sales (incl. reinvestments): $102.7B
- Sales ÷ redemptions: 3.31×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $6.7B | $3.5B | $3.2B |
| May 2026 | $14.8B | $3.8B | $11.0B |
| Apr 2026 | $7.4B | $3.3B | $4.1B |
| Mar 2026 | $4.0B | $2.2B | $1.8B |
| Feb 2026 | $7.5B | $1.7B | $5.8B |
| Jan 2026 | $15.4B | $2.6B | $12.8B |
| Dec 2025 | $9.8B | $3.8B | $6.0B |
| Nov 2025 | $3.1B | $1.3B | $1.8B |
| Oct 2025 | $7.4B | $1.8B | $5.6B |
| Sep 2025 | $10.0B | $2.9B | $7.1B |
| Aug 2025 | $4.1B | $2.5B | $1.6B |
| Jul 2025 | $12.4B | $1.5B | $10.9B |
VTBNX Assets Under Management
Net assets of Vanguard Total Bond Market II Index Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $384.36B |
| 2026-03-31 | $367.43B |
| 2025-12-31 | $350.73B |
| 2025-09-30 | $337.42B |
| 2025-06-30 | $314.54B |
| 2025-03-31 | $317.23B |
| 2024-12-31 | $308.35B |
| 2024-09-30 | $306.41B |
| 2024-06-30 | $289.41B |
| 2024-03-31 | $282.81B |
| 2023-12-31 | $271.11B |
| 2023-09-30 | $249.03B |
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.