VEDIX Performance — Vanguard Extended Duration Treasury Index Fund, Institutional Plus Shares
Data updated: 2026-07-29
VEDIX returned −1.13% year to date and +3.28% over one year to May 2026. Over one year the fund trailed its Long-Term Government Bond category average: $100 grew to $103, against $106 for the category. Volatility over the past 12 months was 13.12% a year. In the 12 months to May 2026 the fund took in a net $206.8M, and assets reached $4.28B.
VEDIX Growth of $100
What $100 invested in Vanguard Extended Duration Treasury Index Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Long-Term Government Bond category average over the same months.
| Period | VEDIX | Category average |
|---|---|---|
| 1 year (Jun 2025 – May 2026) | $103 | $106 |
| 3 years (Jun 2023 – May 2026) | $90 | $104 |
| 5 years (Jun 2021 – May 2026) | $64 | $86 |
| Since data start (Sep 2019 – May 2026) | $60 | $89 |
VEDIX Trailing Returns
Total returns to May 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | −1.13% |
| 1 year | +3.28% |
3- and 5-year figures withheld: disagrees with sibling classes.
VEDIX Annual Returns
Calendar-year total returns of Vanguard Extended Duration Treasury Index Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–May) | −1.13% |
| 2025 | +12.86% |
| 2024 | −16.79% |
| 2023 | +2.12% |
| 2022 | −39.38% |
| 2021 | −6.49% |
| 2020 | +24.21% |
| 2019 (Sep–Dec) | −9.67% |
VEDIX 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 | −0.6% | +6.6% | −6.0% | −1.6% | +0.9% | — | — | — | — | — | — | — |
| 2025 | −0.1% | +20.3% | −2.5% | −3.2% | −4.7% | +3.8% | −1.6% | −1.3% | +6.1% | +2.1% | −0.4% | −3.9% |
| 2024 | −4.4% | −2.6% | +0.9% | −8.9% | +3.9% | +2.1% | +4.3% | +3.1% | +2.4% | −10.7% | +2.8% | −9.3% |
| 2023 | +10.6% | −6.4% | +5.5% | +0.2% | −3.9% | +0.9% | −3.8% | −4.9% | −11.4% | −8.2% | +14.7% | +12.8% |
| 2022 | −4.8% | −2.5% | −6.5% | −12.4% | −3.9% | −1.7% | +2.2% | −4.8% | −10.4% | −8.8% | +9.9% | −3.4% |
| 2021 | −4.9% | −7.6% | −6.6% | +3.1% | −0.1% | +5.7% | +4.7% | −0.2% | −3.7% | +3.3% | +3.6% | −2.8% |
| 2020 | +10.3% | +8.8% | +8.1% | +1.3% | −2.7% | +0.6% | +6.2% | −6.8% | +1.1% | −4.4% | +2.3% | −1.4% |
| 2019 | — | — | — | — | — | — | — | — | −3.4% | −1.9% | −0.3% | −4.3% |
VEDIX Risk
Risk measures from monthly returns over Jun 2025 – May 2026.
- 1-year volatility (annualised): 13.12%
- Best month: +6.62% (Feb 2026)
- Worst month: −6.01% (Mar 2026)
VEDIX Fund Flows
Monthly money in and out of Vanguard Extended Duration Treasury Index Fund, from SEC Form N-PORT.
- 12-month net flow: $206.8M
- 12-month gross sales (incl. reinvestments): $1.5B
- Sales ÷ redemptions: 1.16×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| May 2026 | $10.9M | $209.7M | −$198.8M |
| Apr 2026 | $53.1M | $177.3M | −$124.2M |
| Mar 2026 | $385.4M | $142.5M | $242.9M |
| Feb 2026 | $35.6M | $97.7M | −$62.1M |
| Jan 2026 | $40.0M | $107.9M | −$67.9M |
| Dec 2025 | $53.8M | $39.2M | $14.6M |
| Nov 2025 | $189.1M | $128.0M | $61.0M |
| Oct 2025 | $168.9M | $9.2M | $159.7M |
| Sep 2025 | $115.2M | $149.1M | −$33.9M |
| Aug 2025 | $248.6M | $57.6M | $190.9M |
| Jul 2025 | $141.4M | $29.8M | $111.6M |
| Jun 2025 | $33.2M | $120.1M | −$86.9M |
VEDIX Assets Under Management
Net assets of Vanguard Extended Duration Treasury Index Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-05-31 | $4.28B |
| 2026-02-28 | $4.72B |
| 2025-11-30 | $4.82B |
| 2025-08-31 | $4.34B |
| 2025-05-31 | $4.14B |
| 2025-02-28 | $4.74B |
| 2024-11-30 | $4.89B |
| 2024-08-31 | $4.99B |
| 2024-05-31 | $3.98B |
| 2024-02-29 | $3.93B |
| 2023-11-30 | $3.58B |
| 2023-08-31 | $3.15B |
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.