VBIUX Performance — Vanguard Intermediate-Term Bond Index Fund, Institutional Plus Shares
Data updated: 2026-08-28
VBIUX returned +0.22% year to date and +3.40% over one year to Jun 2026. Annualised returns are +4.63% over 3 years and +0.25% over 5 years. The fund beat its Intermediate Government Bond category average: $100 invested three years ago grew to $115, against $112 for the category, and to $103 over one year, against $103. Volatility over the past three years was 5.75% a year. In the 12 months to Jun 2026 the fund took in a net $7.9B, and assets reached $52.45B.
VBIUX Growth of $100
What $100 invested in Vanguard Intermediate-Term Bond Index Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Intermediate Government Bond category average over the same months.
| Period | VBIUX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $103 | $103 |
| 3 years (Jul 2023 – Jun 2026) | $115 | $112 |
| 5 years (Jul 2021 – Jun 2026) | $101 | $103 |
| Since data start (Jul 2019 – Jun 2026) | $112 | $114 |
VBIUX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +0.22% |
| 1 year | +3.40% |
| 3 years (annualised) | +4.63% |
| 5 years (annualised) | +0.25% |
VBIUX Annual Returns
Calendar-year total returns of Vanguard Intermediate-Term Bond Index Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +0.22% |
| 2025 | +8.58% |
| 2024 | +1.54% |
| 2023 | +6.10% |
| 2022 | −13.24% |
| 2021 | −2.33% |
| 2020 | +9.83% |
| 2019 (Jul–Dec) | +2.33% |
VBIUX 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 | 0.0% | +1.8% | −2.1% | +0.2% | +0.2% | +0.2% | — | — | — | — | — | — |
| 2025 | +0.6% | +2.2% | +0.3% | +0.9% | −0.5% | +1.6% | −0.2% | +1.5% | +0.7% | +0.5% | +0.9% | −0.3% |
| 2024 | 0.0% | −1.7% | +0.9% | −2.4% | +1.7% | +1.0% | +2.7% | +1.4% | +1.5% | −2.8% | +1.1% | −1.7% |
| 2023 | +3.4% | −3.0% | +3.2% | +0.8% | −1.2% | −0.8% | 0.0% | −0.5% | −2.5% | −1.5% | +4.7% | +3.7% |
| 2022 | −2.2% | −0.8% | −3.4% | −3.9% | +0.8% | −1.6% | +2.9% | −3.2% | −4.3% | −0.9% | +3.7% | −0.9% |
| 2021 | −0.7% | −1.8% | −1.8% | +1.1% | +0.6% | +0.7% | +1.5% | −0.3% | −1.2% | −0.7% | +0.4% | −0.2% |
| 2020 | +2.6% | +1.9% | −1.4% | +2.2% | +1.3% | +1.2% | +1.5% | −0.5% | +0.1% | −0.6% | +1.0% | +0.3% |
| 2019 | — | — | — | — | — | — | +0.2% | +2.9% | −0.7% | +0.4% | −0.3% | −0.2% |
VBIUX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 5.75%
- 3-year Sharpe ratio: 0.02 (vs 4.5% risk-free rate)
- Best month: +4.68% (Nov 2023)
- Worst month: −2.80% (Oct 2024)
VBIUX Fund Flows
Monthly money in and out of Vanguard Intermediate-Term Bond Index Fund, from SEC Form N-PORT.
- 12-month net flow: $7.9B
- 12-month gross sales (incl. reinvestments): $13.9B
- Sales ÷ redemptions: 2.34×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $824.5M | $377.2M | $447.2M |
| May 2026 | $1.0B | $751.5M | $292.2M |
| Apr 2026 | $969.6M | $711.1M | $258.5M |
| Mar 2026 | $1.3B | $955.3M | $380.5M |
| Feb 2026 | $1.2B | $392.1M | $764.8M |
| Jan 2026 | $1.6B | $590.1M | $980.1M |
| Dec 2025 | $1.1B | $447.1M | $660.5M |
| Nov 2025 | $980.8M | $312.8M | $668.0M |
| Oct 2025 | $1.3B | $392.7M | $947.3M |
| Sep 2025 | $1.1B | $313.6M | $767.0M |
| Aug 2025 | $1.4B | $294.2M | $1.1B |
| Jul 2025 | $1.0B | $383.4M | $659.9M |
VBIUX Assets Under Management
Net assets of Vanguard Intermediate-Term Bond Index Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $52.45B |
| 2026-03-31 | $51.74B |
| 2025-12-31 | $50.23B |
| 2025-09-30 | $48.01B |
| 2025-06-30 | $45.01B |
| 2025-03-31 | $44.36B |
| 2024-12-31 | $42.21B |
| 2024-09-30 | $41.98B |
| 2024-06-30 | $39.05B |
| 2024-03-31 | $38.50B |
| 2023-12-31 | $37.70B |
| 2023-09-30 | $35.48B |
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.