AGG vs. VAIPX
AGG (iShares Core U.S. Aggregate Bond ETF) and VAIPX (Vanguard Inflation-Protected Securities Fund Admiral Shares) are both funds - AGG is a Total Bond Market fund tracking the Bloomberg U.S. Aggregate Bond Index, while VAIPX is a Inflation-Protected Bonds fund managed by Vanguard. Over the past 10 years, AGG returned 1.57%/yr vs 2.56%/yr for VAIPX. A 0.76 correlation means they provide meaningful diversification when combined. AGG charges 0.03%/yr vs 0.10%/yr for VAIPX.
Performance
AGG vs. VAIPX - Performance Comparison
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Returns By Period
In the year-to-date period, AGG achieves a 0.52% return, which is significantly lower than VAIPX's 1.35% return. Over the past 10 years, AGG has underperformed VAIPX with an annualized return of 1.57%, while VAIPX has yielded a comparatively higher 2.56% annualized return.
AGG
- 1D
- -0.12%
- 1M
- 0.43%
- YTD
- 0.52%
- 6M
- 0.93%
- 1Y
- 4.50%
- 3Y*
- 4.19%
- 5Y*
- 0.06%
- 10Y*
- 1.57%
VAIPX
- 1D
- 0.35%
- 1M
- -0.17%
- YTD
- 1.35%
- 6M
- 1.49%
- 1Y
- 4.72%
- 3Y*
- 3.92%
- 5Y*
- 1.01%
- 10Y*
- 2.56%
AGG vs. VAIPX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
AGG iShares Core U.S. Aggregate Bond ETF | 0.52% | 7.19% | 1.31% | 5.65% | -13.02% | -1.77% | 7.48% | 8.46% | 0.09% | 3.55% |
VAIPX Vanguard Inflation-Protected Securities Fund Admiral Shares | 1.35% | 6.87% | 1.85% | 3.83% | -11.92% | 5.69% | 10.96% | 8.16% | -1.39% | 2.91% |
Correlation
The correlation between AGG and VAIPX is 0.85, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.85 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.90 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.83 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.81 |
Correlation (All Time) Calculated using the full available price history since Jun 10, 2005 | 0.76 |
The correlation between AGG and VAIPX shifts across timeframes, from 0.76 (all time) to 0.90 (3 years), reflecting how their relationship changes across market environments.
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Return for Risk
AGG vs. VAIPX — Risk / Return Rank
AGG
VAIPX
AGG vs. VAIPX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares Core U.S. Aggregate Bond ETF (AGG) and Vanguard Inflation-Protected Securities Fund Admiral Shares (VAIPX). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| AGG | VAIPX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.33 | ||
| Sortino ratioReturn per unit of downside risk | -0.56 | ||
| Omega ratioGain probability vs. loss probability | 1.21 | 1.27 | -0.06 |
| Calmar ratioReturn relative to maximum drawdown | 1.63 | 2.46 | -0.83 |
| Martin ratioReturn relative to average drawdown | 4.82 | 7.79 | -2.97 |
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Drawdowns
AGG vs. VAIPX - Drawdown Comparison
The maximum AGG drawdown since its inception was -18.43%, which is greater than VAIPX's maximum drawdown of -15.04%. Use the drawdown chart below to compare losses from any high point for AGG and VAIPX.
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Drawdown Indicators
| AGG | VAIPX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -18.43% | -15.04% | -3.39% |
Max Drawdown (1Y)Largest decline over 1 year | -2.76% | -2.05% | -0.71% |
Max Drawdown (3Y)Largest decline over 3 years | -6.11% | -4.52% | -1.59% |
Max Drawdown (5Y)Largest decline over 5 years | -17.82% | -14.40% | -3.42% |
Max Drawdown (10Y)Largest decline over 10 years | -18.43% | -14.40% | -4.03% |
Current DrawdownCurrent decline from peak | -1.88% | -0.39% | -1.49% |
Average DrawdownAverage peak-to-trough decline | -2.71% | -3.81% | +1.10% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.94% | 0.65% | +0.29% |
Volatility
AGG vs. VAIPX - Volatility Comparison
iShares Core U.S. Aggregate Bond ETF (AGG) has a higher volatility of 1.37% compared to Vanguard Inflation-Protected Securities Fund Admiral Shares (VAIPX) at 1.15%. This indicates that AGG's price experiences larger fluctuations and is considered to be riskier than VAIPX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| AGG | VAIPX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.37% | 1.15% | +0.22% |
Volatility (6M)Calculated over the trailing 6-month period | 2.81% | 2.36% | +0.45% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.82% | 3.34% | +0.48% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.09% | 5.99% | +0.10% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.41% | 5.32% | +0.09% |
AGG vs. VAIPX - Expense Ratio Comparison
AGG has a 0.03% expense ratio, which is lower than VAIPX's 0.10% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.
Dividends
AGG vs. VAIPX - Dividend Comparison
AGG's dividend yield for the trailing twelve months is around 3.98%, less than VAIPX's 4.50% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
AGG iShares Core U.S. Aggregate Bond ETF | 3.98% | 3.89% | 3.74% | 3.13% | 2.39% | 1.77% | 2.14% | 2.70% | 2.72% | 2.32% | 2.39% | 2.45% |
VAIPX Vanguard Inflation-Protected Securities Fund Admiral Shares | 4.50% | 4.74% | 4.17% | 4.31% | 8.45% | 5.13% | 1.38% | 2.29% | 3.12% | 2.41% | 3.49% | 0.88% |
Frequently Asked Questions
AGG and VAIPX have a correlation of 0.85, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
AGG has higher volatility (1.37%) compared to VAIPX (1.15%). In terms of maximum drawdown, AGG dropped -18.43% vs VAIPX's -15.04%.
VAIPX currently has the higher Sharpe Ratio (1.52 vs 1.19), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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