QDIBX vs. WFBIX
QDIBX (Fisher Investments Institutional Group Fixed Income Fund for Retirement Plans) and WFBIX (iShares U.S. Aggregate Bond Index Fund) are both Intermediate Core Bond funds. Over the past 5 years, QDIBX returned 0.04%/yr vs 0.78%/yr for WFBIX. Their correlation of 0.89 suggests significant overlap in exposure. QDIBX charges 0.03%/yr vs 0.05%/yr for WFBIX.
Performance
QDIBX vs. WFBIX - Performance Comparison
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Returns By Period
In the year-to-date period, QDIBX achieves a 0.11% return, which is significantly lower than WFBIX's 0.43% return.
QDIBX
- 1D
- 0.11%
- 1M
- 0.79%
- YTD
- 0.11%
- 6M
- 0.34%
- 1Y
- 4.19%
- 3Y*
- 4.47%
- 5Y*
- 0.04%
- 10Y*
- —
WFBIX
- 1D
- 0.22%
- 1M
- 0.89%
- YTD
- 0.43%
- 6M
- 0.76%
- 1Y
- 4.76%
- 3Y*
- 5.37%
- 5Y*
- 0.78%
- 10Y*
- 1.93%
QDIBX vs. WFBIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | |
|---|---|---|---|---|---|---|---|---|
QDIBX Fisher Investments Institutional Group Fixed Income Fund for Retirement Plans | 0.11% | 7.72% | 1.66% | 6.71% | -14.11% | -0.17% | 6.77% | -0.10% |
WFBIX iShares U.S. Aggregate Bond Index Fund | 0.43% | 7.16% | 1.43% | 9.65% | -13.03% | -1.79% | 7.40% | 0.29% |
Correlation
The correlation between QDIBX and WFBIX 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 | 0.92 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.93 |
Correlation (All Time) Calculated using the full available price history since Dec 13, 2019 | 0.89 |
The correlation between QDIBX and WFBIX has been stable across timeframes, ranging from 0.89 to 0.93 - a consistent structural relationship.
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Return for Risk
QDIBX vs. WFBIX — Risk / Return Rank
QDIBX
WFBIX
QDIBX vs. WFBIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Fisher Investments Institutional Group Fixed Income Fund for Retirement Plans (QDIBX) and iShares U.S. Aggregate Bond Index Fund (WFBIX). 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.
| QDIBX | WFBIX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.06 | ||
| Sortino ratioReturn per unit of downside risk | -0.10 | ||
| Omega ratioGain probability vs. loss probability | 1.21 | 1.22 | -0.01 |
| Calmar ratioReturn relative to maximum drawdown | 1.46 | 1.59 | -0.13 |
| Martin ratioReturn relative to average drawdown | 4.09 | 4.46 | -0.37 |
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Drawdowns
QDIBX vs. WFBIX - Drawdown Comparison
The maximum QDIBX drawdown since its inception was -19.63%, which is greater than WFBIX's maximum drawdown of -18.68%. Use the drawdown chart below to compare losses from any high point for QDIBX and WFBIX.
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Drawdown Indicators
| QDIBX | WFBIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -19.63% | -18.68% | -0.95% |
Max Drawdown (1Y)Largest decline over 1 year | -2.97% | -3.02% | +0.05% |
Max Drawdown (3Y)Largest decline over 3 years | -5.37% | -6.09% | +0.72% |
Max Drawdown (5Y)Largest decline over 5 years | -19.63% | -17.84% | -1.79% |
Max Drawdown (10Y)Largest decline over 10 years | — | -18.68% | — |
Current DrawdownCurrent decline from peak | -1.65% | -1.50% | -0.15% |
Average DrawdownAverage peak-to-trough decline | -6.35% | -2.26% | -4.09% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.06% | 1.07% | -0.01% |
Volatility
QDIBX vs. WFBIX - Volatility Comparison
The current volatility for Fisher Investments Institutional Group Fixed Income Fund for Retirement Plans (QDIBX) is 1.01%, while iShares U.S. Aggregate Bond Index Fund (WFBIX) has a volatility of 1.22%. This indicates that QDIBX experiences smaller price fluctuations and is considered to be less risky than WFBIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| QDIBX | WFBIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.01% | 1.22% | -0.21% |
Volatility (6M)Calculated over the trailing 6-month period | 2.65% | 2.87% | -0.22% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.73% | 3.91% | -0.18% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.59% | 6.41% | +0.18% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 6.25% | 5.17% | +1.08% |
QDIBX vs. WFBIX - Expense Ratio Comparison
QDIBX has a 0.03% expense ratio, which is lower than WFBIX's 0.05% 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
QDIBX vs. WFBIX - Dividend Comparison
QDIBX's dividend yield for the trailing twelve months is around 3.49%, less than WFBIX's 3.91% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
QDIBX Fisher Investments Institutional Group Fixed Income Fund for Retirement Plans | 3.49% | 3.50% | 3.55% | 3.65% | 2.51% | 1.80% | 3.25% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
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
QDIBX and WFBIX 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.
WFBIX has higher volatility (1.22%) compared to QDIBX (1.01%). In terms of maximum drawdown, QDIBX dropped -19.63% vs WFBIX's -18.68%.
WFBIX currently has the higher Sharpe Ratio (1.22 vs 1.16), 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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