WFBIX vs. PONAX
WFBIX (iShares U.S. Aggregate Bond Index Fund) and PONAX (PIMCO Income Fund Class A) are both mutual funds - WFBIX is a Intermediate Core Bond fund managed by BlackRock, while PONAX is a Multisector Bonds fund managed by PIMCO. Over the past 10 years, WFBIX returned 1.96%/yr vs 4.30%/yr for PONAX. A 0.58 correlation means they provide meaningful diversification when combined. WFBIX charges 0.05%/yr vs 1.02%/yr for PONAX.
Performance
WFBIX vs. PONAX - Performance Comparison
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Returns By Period
In the year-to-date period, WFBIX achieves a 0.43% return, which is significantly lower than PONAX's 0.83% return. Over the past 10 years, WFBIX has underperformed PONAX with an annualized return of 1.96%, while PONAX has yielded a comparatively higher 4.30% annualized return.
WFBIX
- 1D
- 0.00%
- 1M
- 0.45%
- YTD
- 0.43%
- 6M
- 0.32%
- 1Y
- 5.35%
- 3Y*
- 5.33%
- 5Y*
- 0.99%
- 10Y*
- 1.96%
PONAX
- 1D
- 0.18%
- 1M
- 0.88%
- YTD
- 0.83%
- 6M
- 1.21%
- 1Y
- 7.96%
- 3Y*
- 7.44%
- 5Y*
- 3.14%
- 10Y*
- 4.30%
WFBIX vs. PONAX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
WFBIX iShares U.S. Aggregate Bond Index Fund | 0.43% | 7.16% | 1.43% | 9.65% | -13.03% | -1.79% | 7.40% | 8.72% | -0.08% | 3.39% |
PONAX PIMCO Income Fund Class A | 0.83% | 10.63% | 5.02% | 8.96% | -9.34% | 2.21% | 5.40% | 7.65% | 0.21% | 8.19% |
Correlation
The correlation between WFBIX and PONAX is 0.89, 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 | 0.89 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.88 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.79 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.62 |
Correlation (All Time) Calculated using the full available price history since Apr 3, 2007 | 0.58 |
Over the past year, WFBIX and PONAX have become more correlated (0.89) than their long-term average of 0.58, meaning their price movements have been converging.
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Return for Risk
WFBIX vs. PONAX — Risk / Return Rank
WFBIX
PONAX
WFBIX vs. PONAX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares U.S. Aggregate Bond Index Fund (WFBIX) and PIMCO Income Fund Class A (PONAX). 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.
| WFBIX | PONAX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.60 | ||
| Sortino ratioReturn per unit of downside risk | -0.88 | ||
| Omega ratioGain probability vs. loss probability | 1.25 | 1.38 | -0.13 |
| Calmar ratioReturn relative to maximum drawdown | 1.78 | 2.17 | -0.39 |
| Martin ratioReturn relative to average drawdown | 5.34 | 7.45 | -2.11 |
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
| WFBIX | PONAX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 1.36 | 1.96 | -0.60 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.16 | 0.66 | -0.50 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.38 | 1.03 | -0.64 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.94 | 1.48 | -0.54 |
Drawdowns
WFBIX vs. PONAX - Drawdown Comparison
The maximum WFBIX drawdown since its inception was -18.68%, which is greater than PONAX's maximum drawdown of -13.64%. Use the drawdown chart below to compare losses from any high point for WFBIX and PONAX.
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Drawdown Indicators
| WFBIX | PONAX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -18.68% | -13.64% | -5.04% |
Max Drawdown (1Y)Largest decline over 1 year | -3.02% | -3.69% | +0.67% |
Max Drawdown (3Y)Largest decline over 3 years | -6.09% | -3.90% | -2.19% |
Max Drawdown (5Y)Largest decline over 5 years | -17.84% | -13.64% | -4.20% |
Max Drawdown (10Y)Largest decline over 10 years | -18.68% | -13.64% | -5.04% |
Current DrawdownCurrent decline from peak | -1.50% | -1.03% | -0.47% |
Average DrawdownAverage peak-to-trough decline | -2.26% | -1.80% | -0.46% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.00% | 1.07% | -0.07% |
Volatility
WFBIX vs. PONAX - Volatility Comparison
The current volatility for iShares U.S. Aggregate Bond Index Fund (WFBIX) is 1.34%, while PIMCO Income Fund Class A (PONAX) has a volatility of 1.67%. This indicates that WFBIX experiences smaller price fluctuations and is considered to be less risky than PONAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| WFBIX | PONAX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.34% | 1.67% | -0.33% |
Volatility (6M)Calculated over the trailing 6-month period | 2.83% | 3.25% | -0.42% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.97% | 4.10% | -0.13% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.40% | 4.81% | +1.59% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.17% | 4.21% | +0.96% |
WFBIX vs. PONAX - Expense Ratio Comparison
WFBIX has a 0.05% expense ratio, which is lower than PONAX's 1.02% expense ratio.
Dividends
WFBIX vs. PONAX - Dividend Comparison
WFBIX's dividend yield for the trailing twelve months is around 3.91%, less than PONAX's 5.43% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
PONAX PIMCO Income Fund Class A | 5.43% | 5.61% | 5.86% | 5.86% | 4.66% | 3.62% | 4.48% | 5.42% | 5.24% | 4.97% | 5.13% | 7.45% |
WFBIX iShares U.S. Aggregate Bond Index Fund | 3.91% | 3.78% | 3.68% | 6.82% | 2.60% | 2.04% | 2.43% | 2.88% | 2.71% | 2.24% | 2.25% | 2.20% |
Frequently Asked Questions
WFBIX and PONAX have a correlation of 0.89, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
PONAX has higher volatility (1.67%) compared to WFBIX (1.34%). In terms of maximum drawdown, WFBIX dropped -18.68% vs PONAX's -13.64%.
PONAX currently has the higher Sharpe Ratio (1.96 vs 1.36), 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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