USIG vs. AGG
USIG (iShares Broad USD Investment Grade Corporate Bond ETF) and AGG (iShares Core U.S. Aggregate Bond ETF) are both exchange-traded funds - USIG is a Corporate Bonds fund tracking the ICE BofA US Corporate, while AGG is a Total Bond Market fund tracking the Bloomberg U.S. Aggregate Bond Index. Both are passively managed. Over the past 10 years, USIG returned 2.58%/yr vs 1.54%/yr for AGG. Their correlation of 0.82 suggests significant overlap in exposure. USIG charges 0.04%/yr vs 0.03%/yr for AGG.
Performance
USIG vs. AGG - Performance Comparison
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Returns By Period
In the year-to-date period, USIG achieves a 0.83% return, which is significantly higher than AGG's 0.47% return. Over the past 10 years, USIG has outperformed AGG with an annualized return of 2.58%, while AGG has yielded a comparatively lower 1.54% annualized return.
USIG
- 1D
- 0.12%
- 1M
- 0.78%
- YTD
- 0.83%
- 6M
- 0.89%
- 1Y
- 5.21%
- 3Y*
- 5.45%
- 5Y*
- 0.58%
- 10Y*
- 2.58%
AGG
- 1D
- 0.08%
- 1M
- 0.61%
- YTD
- 0.47%
- 6M
- 0.55%
- 1Y
- 4.33%
- 3Y*
- 3.96%
- 5Y*
- 0.07%
- 10Y*
- 1.54%
USIG vs. AGG - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
USIG iShares Broad USD Investment Grade Corporate Bond ETF | 0.83% | 7.86% | 2.56% | 8.71% | -15.30% | -1.34% | 9.44% | 13.99% | -2.21% | 5.75% |
AGG iShares Core U.S. Aggregate Bond ETF | 0.47% | 7.19% | 1.31% | 5.65% | -13.02% | -1.77% | 7.48% | 8.46% | 0.09% | 3.55% |
Correlation
The correlation between USIG and AGG is 0.96 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.96 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.97 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.95 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.92 |
Correlation (All Time) Calculated using the full available price history since Jan 11, 2007 | 0.82 |
The correlation between USIG and AGG shifts across timeframes, from 0.82 (all time) to 0.97 (3 years), reflecting how their relationship changes across market environments.
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Return for Risk
USIG vs. AGG — Risk / Return Rank
USIG
AGG
USIG vs. AGG - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares Broad USD Investment Grade Corporate Bond ETF (USIG) and iShares Core U.S. Aggregate Bond ETF (AGG). 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.
| USIG | AGG | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.14 | ||
| Sortino ratioReturn per unit of downside risk | +0.19 | ||
| Omega ratioGain probability vs. loss probability | 1.22 | 1.20 | +0.02 |
| Calmar ratioReturn relative to maximum drawdown | 1.87 | 1.57 | +0.30 |
| Martin ratioReturn relative to average drawdown | 5.95 | 4.54 | +1.41 |
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Drawdowns
USIG vs. AGG - Drawdown Comparison
The maximum USIG drawdown since its inception was -22.21%, which is greater than AGG's maximum drawdown of -18.43%. Use the drawdown chart below to compare losses from any high point for USIG and AGG.
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Drawdown Indicators
| USIG | AGG | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -22.21% | -18.43% | -3.78% |
Max Drawdown (1Y)Largest decline over 1 year | -2.79% | -2.76% | -0.03% |
Max Drawdown (3Y)Largest decline over 3 years | -6.10% | -6.11% | +0.01% |
Max Drawdown (5Y)Largest decline over 5 years | -21.45% | -17.82% | -3.63% |
Max Drawdown (10Y)Largest decline over 10 years | -21.45% | -18.43% | -3.02% |
Current DrawdownCurrent decline from peak | -0.70% | -1.93% | +1.23% |
Average DrawdownAverage peak-to-trough decline | -3.41% | -2.71% | -0.70% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.88% | 0.96% | -0.08% |
Volatility
USIG vs. AGG - Volatility Comparison
iShares Broad USD Investment Grade Corporate Bond ETF (USIG) and iShares Core U.S. Aggregate Bond ETF (AGG) have volatilities of 1.14% and 1.10%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| USIG | AGG | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.14% | 1.10% | +0.04% |
Volatility (6M)Calculated over the trailing 6-month period | 3.12% | 2.83% | +0.29% |
Volatility (1Y)Calculated over the trailing 1-year period | 4.10% | 3.81% | +0.29% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.82% | 6.10% | +0.72% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 6.83% | 5.41% | +1.42% |
USIG vs. AGG - Expense Ratio Comparison
USIG has a 0.04% expense ratio, which is higher than AGG's 0.03% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.
Dividends
USIG vs. AGG - Dividend Comparison
USIG's dividend yield for the trailing twelve months is around 4.73%, more than AGG's 3.98% 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% |
USIG iShares Broad USD Investment Grade Corporate Bond ETF | 4.73% | 4.62% | 4.51% | 3.94% | 3.14% | 2.33% | 2.82% | 3.37% | 3.44% | 3.03% | 2.87% | 3.24% |
Frequently Asked Questions
With a correlation of 0.96, USIG and AGG move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.
USIG has higher volatility (1.14%) compared to AGG (1.10%). In terms of maximum drawdown, USIG dropped -22.21% vs AGG's -18.43%.
On 10-year performance, USIG leads with 2.58% vs 1.54% for AGG. On fees, AGG is cheaper at 0.03% per year. Their volatility is very similar. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 10-year period, USIG has performed better with a 2.58% return vs 1.54%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
AGG is cheaper with a 0.03% expense ratio, compared with 0.04% for USIG.
USIG has the higher dividend yield at 4.73%, compared with 3.98% for AGG.
USIG is categorized as Corporate Bonds, while AGG is Total Bond Market. USIG tracks ICE BofA US Corporate, while AGG tracks Bloomberg U.S. Aggregate Bond Index. Their fees differ too: 0.04% for USIG and 0.03% for AGG.
USIG currently has the higher Sharpe Ratio (1.28 vs 1.14), 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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