VAIPX Performance — Vanguard Inflation-Protected Securities Fund, Admiral Shares
Data updated: 2026-08-28
VAIPX returned +1.22% year to date and +3.42% over one year to Jun 2026. Annualised returns are +3.94% over 3 years and +0.93% over 5 years. The fund trailed its Alternative category average: $100 invested three years ago grew to $112, against $170 for the category, and to $103 over one year, against $110. Volatility over the past three years was 4.22% a year. In the 12 months to Jun 2026 the fund took in a net $1.2B, and assets reached $28.19B.
VAIPX Growth of $100
What $100 invested in Vanguard Inflation-Protected Securities Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Alternative category average over the same months.
| Period | VAIPX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $103 | $110 |
| 3 years (Jul 2023 – Jun 2026) | $112 | $170 |
| 5 years (Jul 2021 – Jun 2026) | $105 | $159 |
| Since data start (Jul 2019 – Jun 2026) | $120 | $190 |
VAIPX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +1.22% |
| 1 year | +3.42% |
| 3 years (annualised) | +3.94% |
| 5 years (annualised) | +0.93% |
VAIPX Annual Returns
Calendar-year total returns of Vanguard Inflation-Protected Securities Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +1.22% |
| 2025 | +6.87% |
| 2024 | +1.86% |
| 2023 | +3.79% |
| 2022 | −11.85% |
| 2021 | +5.68% |
| 2020 | +10.96% |
| 2019 (Jul–Dec) | +1.94% |
VAIPX 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 | +0.4% | +1.3% | −1.4% | +1.0% | +0.2% | −0.4% | — | — | — | — | — | — |
| 2025 | +1.2% | +2.2% | +0.6% | +0.1% | −0.6% | +1.0% | +0.1% | +1.5% | +0.4% | +0.4% | +0.2% | −0.5% |
| 2024 | +0.3% | −1.1% | +0.7% | −1.7% | +1.8% | +0.8% | +1.8% | +0.8% | +1.5% | −1.9% | +0.5% | −1.6% |
| 2023 | +2.1% | −1.5% | +2.9% | +0.1% | −1.3% | −0.5% | +0.1% | −0.9% | −1.8% | −0.8% | +2.7% | +2.6% |
| 2022 | −1.9% | +0.8% | −1.6% | −2.2% | −0.9% | −3.1% | +4.2% | −2.7% | −6.6% | +1.2% | +1.9% | −1.2% |
| 2021 | +0.5% | −1.7% | −0.1% | +1.4% | +1.1% | +0.6% | +2.5% | −0.1% | −0.7% | +1.1% | +1.0% | +0.1% |
| 2020 | +2.1% | +1.0% | −1.3% | +2.5% | +0.6% | +1.0% | +2.3% | +1.0% | −0.3% | −0.6% | +1.1% | +1.1% |
| 2019 | — | — | — | — | — | — | +0.2% | +2.3% | −1.1% | −0.1% | +0.2% | +0.4% |
VAIPX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 4.22%
- 3-year Sharpe ratio: -0.13 (vs 4.5% risk-free rate)
- Best month: +2.69% (Nov 2023)
- Worst month: −1.86% (Oct 2024)
VAIPX Fund Flows
Monthly money in and out of Vanguard Inflation-Protected Securities Fund, from SEC Form N-PORT.
- 12-month net flow: $1.2B
- 12-month gross sales (incl. reinvestments): $6.8B
- Sales ÷ redemptions: 1.20×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $449.9M | $502.2M | −$52.3M |
| May 2026 | $506.9M | $452.2M | $54.7M |
| Apr 2026 | $505.7M | $425.8M | $79.9M |
| Mar 2026 | $619.0M | $384.3M | $234.7M |
| Feb 2026 | $395.0M | $368.3M | $26.7M |
| Jan 2026 | $458.0M | $534.8M | −$76.8M |
| Dec 2025 | $984.6M | $540.5M | $444.1M |
| Nov 2025 | $695.7M | $539.9M | $155.8M |
| Oct 2025 | $723.8M | $476.1M | $247.7M |
| Sep 2025 | $383.5M | $464.0M | −$80.5M |
| Aug 2025 | $420.0M | $462.0M | −$42.0M |
| Jul 2025 | $649.1M | $486.2M | $162.9M |
VAIPX Assets Under Management
Net assets of Vanguard Inflation-Protected Securities Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $28.19B |
| 2026-03-31 | $27.88B |
| 2025-12-31 | $27.61B |
| 2025-09-30 | $27.35B |
| 2025-06-30 | $27.04B |
| 2025-03-31 | $27.20B |
| 2024-12-31 | $25.86B |
| 2024-09-30 | $27.17B |
| 2024-06-30 | $26.75B |
| 2024-03-31 | $27.76B |
| 2023-12-31 | $28.67B |
| 2023-09-30 | $28.91B |
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.