VFISX Performance — Vanguard Short-Term Treasury Fund, Investor Shares
Data updated: 2026-09-28
VFISX returned +0.64% year to date and +2.94% over one year to Jul 2026. Annualised returns are +4.14% over 3 years and +1.49% over 5 years. Against its Short-Term Government Bond category average the fund came out behind over three years but ahead over one: $100 invested three years ago grew to $113, against $114 for the category, and to $103 over one year, against $103. Volatility over the past three years was 1.93% a year. In the 12 months to Jul 2026 the fund lost a net $16.0M, and assets reached $5.77B.
VFISX Growth of $100
What $100 invested in Vanguard Short-Term Treasury Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Short-Term Government Bond category average over the same months.
| Period | VFISX | Category average |
|---|---|---|
| 1 year (Aug 2025 – Jul 2026) | $103 | $103 |
| 3 years (Aug 2023 – Jul 2026) | $113 | $114 |
| 5 years (Aug 2021 – Jul 2026) | $108 | $110 |
| Since data start (Aug 2019 – Jul 2026) | $113 | $118 |
VFISX Trailing Returns
Total returns to Jul 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +0.64% |
| 1 year | +2.94% |
| 3 years (annualised) | +4.14% |
| 5 years (annualised) | +1.49% |
VFISX Annual Returns
Calendar-year total returns of Vanguard Short-Term Treasury Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jul) | +0.64% |
| 2025 | +5.35% |
| 2024 | +3.73% |
| 2023 | +3.51% |
| 2022 | −4.71% |
| 2021 | −0.87% |
| 2020 | +3.96% |
| 2019 (Aug–Dec) | +1.06% |
VFISX 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 | +0.2% | +0.8% | −0.7% | +0.2% | 0.0% | +0.1% | 0.0% | — | — | — | — | — |
| 2025 | +0.5% | +0.9% | +0.4% | +0.8% | −0.3% | +0.6% | −0.1% | +0.9% | +0.3% | +0.3% | +0.5% | +0.2% |
| 2024 | +0.3% | −0.6% | +0.4% | −0.5% | +0.8% | +0.6% | +1.3% | +1.0% | +0.8% | −0.9% | +0.3% | 0.0% |
| 2023 | +1.0% | −1.2% | +1.7% | +0.2% | −0.5% | −0.7% | +0.3% | +0.3% | −0.5% | +0.2% | +1.3% | +1.4% |
| 2022 | −0.7% | −0.2% | −1.6% | −0.7% | +0.7% | −0.8% | +0.6% | −1.1% | −1.5% | −0.2% | +0.7% | 0.0% |
| 2021 | 0.0% | −0.3% | +0.1% | +0.2% | +0.1% | −0.3% | +0.1% | 0.0% | −0.2% | −0.4% | 0.0% | −0.2% |
| 2020 | +0.6% | +1.0% | +1.0% | +0.2% | +0.4% | +0.1% | +0.2% | +0.2% | +0.1% | −0.1% | +0.1% | +0.1% |
| 2019 | — | — | — | — | — | — | — | +0.9% | −0.2% | +0.3% | 0.0% | +0.1% |
VFISX Risk
Risk measures from monthly returns over Aug 2023 – Jul 2026.
- 3-year volatility (annualised): 1.93%
- 3-year Sharpe ratio: -0.18 (vs 4.5% risk-free rate)
- Best month: +1.38% (Dec 2023)
- Worst month: −0.87% (Oct 2024)
VFISX Fund Flows
Monthly money in and out of Vanguard Short-Term Treasury Fund, from SEC Form N-PORT.
- 12-month net flow: −$16.0M
- 12-month gross sales (incl. reinvestments): $1.5B
- Sales ÷ redemptions: 0.99×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jul 2026 | $121.0M | $92.4M | $28.5M |
| Jun 2026 | $121.0M | $121.0M | $22K |
| May 2026 | $118.7M | $133.1M | −$14.4M |
| Apr 2026 | $112.9M | $106.4M | $6.5M |
| Mar 2026 | $116.0M | $104.6M | $11.5M |
| Feb 2026 | $106.4M | $92.6M | $13.8M |
| Jan 2026 | $131.7M | $125.6M | $6.1M |
| Dec 2025 | $95.7M | $136.4M | −$40.6M |
| Nov 2025 | $219.1M | $106.7M | $112.4M |
| Oct 2025 | $152.5M | $139.6M | $12.9M |
| Sep 2025 | $97.9M | $121.7M | −$23.7M |
| Aug 2025 | $87.7M | $216.6M | −$128.9M |
VFISX Assets Under Management
Net assets of Vanguard Short-Term Treasury Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-07-31 | $5.77B |
| 2026-04-30 | $5.81B |
| 2026-01-31 | $5.81B |
| 2025-10-31 | $5.73B |
| 2025-07-31 | $5.84B |
| 2025-04-30 | $5.93B |
| 2025-01-31 | $5.81B |
| 2024-10-31 | $5.76B |
| 2024-07-31 | $5.68B |
| 2024-04-30 | $5.76B |
| 2024-01-31 | $6.10B |
| 2023-10-31 | $6.24B |
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.