IUSB vs. PIMIX
IUSB (iShares Core Universal USD Bond ETF) and PIMIX (PIMCO Income Fund Institutional Class) are both funds - IUSB is a Intermediate Core-Plus Bond fund tracking the Bloomberg U.S. Universal Index, while PIMIX is a Total Bond Market fund managed by PIMCO. Over the past 10 years, IUSB returned 1.94%/yr vs 4.71%/yr for PIMIX. A 0.55 correlation means they provide meaningful diversification when combined. IUSB charges 0.06%/yr vs 0.62%/yr for PIMIX.
Performance
IUSB vs. PIMIX - Performance Comparison
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Returns By Period
In the year-to-date period, IUSB achieves a 0.43% return, which is significantly lower than PIMIX's 1.00% return. Over the past 10 years, IUSB has underperformed PIMIX with an annualized return of 1.94%, while PIMIX has yielded a comparatively higher 4.71% annualized return.
IUSB
- 1D
- -0.17%
- 1M
- 0.31%
- YTD
- 0.43%
- 6M
- 0.31%
- 1Y
- 5.54%
- 3Y*
- 4.51%
- 5Y*
- 0.44%
- 10Y*
- 1.94%
PIMIX
- 1D
- 0.18%
- 1M
- 0.91%
- YTD
- 1.00%
- 6M
- 1.41%
- 1Y
- 8.39%
- 3Y*
- 7.87%
- 5Y*
- 3.53%
- 10Y*
- 4.71%
IUSB vs. PIMIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
IUSB iShares Core Universal USD Bond ETF | 0.43% | 7.38% | 2.11% | 6.23% | -13.04% | -1.33% | 7.62% | 9.13% | -0.27% | 3.82% |
PIMIX PIMCO Income Fund Institutional Class | 1.00% | 11.08% | 5.45% | 9.36% | -9.07% | 2.62% | 5.84% | 8.10% | 0.63% | 8.63% |
Correlation
The correlation between IUSB and PIMIX is 0.84, 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 | 0.84 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.84 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.79 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.64 |
Correlation (All Time) Calculated using the full available price history since Jun 13, 2014 | 0.55 |
Over the past year, IUSB and PIMIX have become more correlated (0.84) than their long-term average of 0.55, meaning their price movements have been converging.
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Return for Risk
IUSB vs. PIMIX — Risk / Return Rank
IUSB
PIMIX
IUSB vs. PIMIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares Core Universal USD Bond ETF (IUSB) and PIMCO Income Fund Institutional Class (PIMIX). 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.
| IUSB | PIMIX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.50 | ||
| Sortino ratioReturn per unit of downside risk | -0.77 | ||
| Omega ratioGain probability vs. loss probability | 1.27 | 1.40 | -0.12 |
| Calmar ratioReturn relative to maximum drawdown | 2.20 | 2.29 | -0.09 |
| Martin ratioReturn relative to average drawdown | 6.68 | 7.97 | -1.28 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
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Sharpe Ratios by Period
| IUSB | PIMIX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 1.54 | 2.04 | -0.50 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.08 | 0.73 | -0.66 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.39 | 1.11 | -0.73 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.46 | 1.57 | -1.11 |
Drawdowns
IUSB vs. PIMIX - Drawdown Comparison
The maximum IUSB drawdown since its inception was -17.90%, which is greater than PIMIX's maximum drawdown of -13.39%. Use the drawdown chart below to compare losses from any high point for IUSB and PIMIX.
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Drawdown Indicators
| IUSB | PIMIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -17.90% | -13.39% | -4.51% |
Max Drawdown (1Y)Largest decline over 1 year | -2.53% | -3.69% | +1.16% |
Max Drawdown (3Y)Largest decline over 3 years | -5.82% | -3.84% | -1.98% |
Max Drawdown (5Y)Largest decline over 5 years | -17.87% | -13.34% | -4.53% |
Max Drawdown (10Y)Largest decline over 10 years | -17.90% | -13.39% | -4.51% |
Current DrawdownCurrent decline from peak | -1.33% | -0.93% | -0.40% |
Average DrawdownAverage peak-to-trough decline | -3.59% | -1.69% | -1.90% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.83% | 1.06% | -0.23% |
Volatility
IUSB vs. PIMIX - Volatility Comparison
The current volatility for iShares Core Universal USD Bond ETF (IUSB) is 1.24%, while PIMCO Income Fund Institutional Class (PIMIX) has a volatility of 1.68%. This indicates that IUSB experiences smaller price fluctuations and is considered to be less risky than PIMIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| IUSB | PIMIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.24% | 1.68% | -0.44% |
Volatility (6M)Calculated over the trailing 6-month period | 2.62% | 3.29% | -0.67% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.62% | 4.15% | -0.53% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 5.79% | 4.84% | +0.95% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.04% | 4.25% | +0.79% |
IUSB vs. PIMIX - Expense Ratio Comparison
IUSB has a 0.06% expense ratio, which is lower than PIMIX's 0.62% expense ratio.
Dividends
IUSB vs. PIMIX - Dividend Comparison
IUSB's dividend yield for the trailing twelve months is around 4.23%, less than PIMIX's 5.83% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
IUSB iShares Core Universal USD Bond ETF | 4.23% | 4.17% | 4.04% | 3.46% | 2.53% | 1.74% | 2.68% | 3.04% | 2.98% | 2.56% | 2.60% | 1.95% |
PIMIX PIMCO Income Fund Institutional Class | 5.83% | 6.01% | 6.27% | 6.21% | 4.98% | 4.02% | 4.88% | 5.83% | 5.66% | 5.37% | 5.52% | 7.88% |
Frequently Asked Questions
IUSB and PIMIX have a correlation of 0.84, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
PIMIX has higher volatility (1.68%) compared to IUSB (1.24%). In terms of maximum drawdown, IUSB dropped -17.90% vs PIMIX's -13.39%.
PIMIX currently has the higher Sharpe Ratio (2.04 vs 1.54), 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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