IUSB vs. ABNFX
IUSB (iShares Core Universal USD Bond ETF) and ABNFX (American Funds The Bond Fund of America® Class F-2) are both funds - IUSB is a Intermediate Core-Plus Bond fund tracking the Bloomberg U.S. Universal Index, while ABNFX is a Intermediate Core Bond fund actively managed by American Funds. IUSB is passively managed, while ABNFX is actively managed. Over the past 10 years, IUSB returned 1.70%/yr vs 1.66%/yr for ABNFX. Their correlation of 0.86 means they have usually moved in the same direction. IUSB charges 0.06%/yr vs 0.34%/yr for ABNFX.
Performance
IUSB vs. ABNFX - Performance Comparison
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Returns By Period
In the year-to-date period, IUSB achieves a -0.29% return, which is significantly higher than ABNFX's -0.96% return. Both investments have delivered pretty close results over the past 10 years, with IUSB having a 1.70% annualized return and ABNFX not far behind at 1.66%.
IUSB
- 1D
- -0.21%
- 1M
- -1.11%
- 6M
- -0.52%
- YTD
- -0.29%
- 1Y
- 2.26%
- 3Y*
- 4.42%
- 5Y*
- -0.01%
- 10Y*
- 1.70%
- ALL TIME*
- 2.13%
ABNFX
- 1D
- 0.00%
- 1M
- -1.25%
- 6M
- -1.22%
- YTD
- -0.96%
- 1Y
- 1.57%
- 3Y*
- 3.62%
- 5Y*
- -0.56%
- 10Y*
- 1.66%
- ALL TIME*
- 2.77%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $0.00 | $0.00 | $0.00 | |
| $142.04M | $149.14M | $266.40M |
IUSB vs. ABNFX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
IUSB iShares Core Universal USD Bond ETF | -0.29% | 7.38% | 2.11% | 6.23% | -13.04% | -1.33% | 7.62% | 9.13% | -0.27% | 3.82% |
ABNFX American Funds The Bond Fund of America® Class F-2 | -0.96% | 7.42% | 1.42% | 4.29% | -13.08% | -0.88% | 10.86% | 8.08% | 0.15% | 3.48% |
Correlation
The correlation between IUSB and ABNFX is 0.90, meaning they have usually moved in the same direction, including during past declines.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.90 |
Correlation (3Y) Balances recent behavior with more history. | 0.93 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.94 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.90 |
Correlation (All Time) Calculated using the full available price history since Jun 12, 2014 | 0.86 |
The correlation between IUSB and ABNFX has been stable across timeframes, ranging from 0.86 to 0.94 - a consistent structural relationship.
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Return for Risk
IUSB vs. ABNFX — Risk / Return Rank
IUSB
ABNFX
IUSB vs. ABNFX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares Core Universal USD Bond ETF (IUSB) and American Funds The Bond Fund of America® Class F-2 (ABNFX). 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.
| IUSB | ABNFX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.11 | ||
| Sortino ratioReturn per unit of downside risk | +0.15 | ||
| Omega ratioGain probability vs. loss probability | 1.15 | 1.13 | +0.02 |
| Calmar ratioReturn relative to maximum drawdown | 1.22 | 0.93 | +0.29 |
| Martin ratioReturn relative to average drawdown | 3.12 | 2.27 | +0.85 |
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Drawdowns
IUSB vs. ABNFX - Drawdown Comparison
The maximum IUSB drawdown since its inception was -17.90%, roughly equal to the maximum ABNFX drawdown of -17.69%. Use the drawdown chart below to compare losses from any high point for IUSB and ABNFX.
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Drawdown Indicators
| IUSB | ABNFX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -17.90% | -17.69% | -0.21% |
Max Drawdown (1Y)Largest decline over 1 year | -2.53% | -3.09% | +0.56% |
Max Drawdown (3Y)Largest decline over 3 years | -4.81% | -5.11% | +0.30% |
Max Drawdown (5Y)Largest decline over 5 years | -17.87% | -17.65% | -0.22% |
Max Drawdown (10Y)Largest decline over 10 years | -17.90% | -17.69% | -0.21% |
Current DrawdownCurrent decline from peak | -2.03% | -3.05% | +1.02% |
Average DrawdownAverage peak-to-trough decline | -3.56% | -3.28% | -0.28% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.98% | 1.26% | -0.28% |
Volatility
IUSB vs. ABNFX - Volatility Comparison
iShares Core Universal USD Bond ETF (IUSB) and American Funds The Bond Fund of America® Class F-2 (ABNFX) have volatilities of 0.92% and 0.95%, 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
| IUSB | ABNFX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.92% | 0.95% | -0.03% |
Volatility (6M)Calculated over the trailing 6-month period | 2.82% | 3.02% | -0.20% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.55% | 3.81% | -0.26% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 5.80% | 5.97% | -0.17% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.04% | 4.90% | +0.14% |
IUSB vs. ABNFX - Expense Ratio Comparison
IUSB has a 0.06% expense ratio, which is lower than ABNFX's 0.34% expense ratio.
Dividends
IUSB vs. ABNFX - Dividend Comparison
IUSB's dividend yield for the trailing twelve months is around 4.28%, more than ABNFX's 4.06% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
ABNFX American Funds The Bond Fund of America® Class F-2 | 4.06% | 4.37% | 4.55% | 3.19% | 2.37% | 2.07% | 5.15% | 3.72% | 2.65% | 2.10% | 2.31% | 2.24% |
IUSB iShares Core Universal USD Bond ETF | 3.92% | 4.17% | 4.04% | 3.46% | 2.53% | 1.74% | 2.68% | 3.04% | 2.98% | 2.56% | 2.60% | 1.95% |
Frequently Asked Questions
IUSB and ABNFX have a correlation of 0.90, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
ABNFX has higher volatility (0.95%) compared to IUSB (0.92%). In terms of maximum drawdown, IUSB dropped -17.90% vs ABNFX's -17.69%.
IUSB currently has the higher Sharpe Ratio (0.87 vs 0.76), 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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