MNTRX vs. WFBIX
MNTRX (Allspring Core Bond Fund) and WFBIX (iShares U.S. Aggregate Bond Index Fund) are both Intermediate Core Bond funds. Over the past 10 years, MNTRX returned 1.15%/yr vs 1.68%/yr for WFBIX. Their correlation of 0.92 means they have usually moved in the same direction. MNTRX charges 0.70%/yr vs 0.05%/yr for WFBIX.
Performance
MNTRX vs. WFBIX - Performance Comparison
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Returns By Period
In the year-to-date period, MNTRX achieves a -0.84% return, which is significantly lower than WFBIX's -0.68% return. Over the past 10 years, MNTRX has underperformed WFBIX with an annualized return of 1.15%, while WFBIX has yielded a comparatively higher 1.68% annualized return.
MNTRX
- 1D
- 0.09%
- 1M
- -1.27%
- 6M
- -1.08%
- YTD
- -0.84%
- 1Y
- 1.57%
- 3Y*
- 3.53%
- 5Y*
- -0.71%
- 10Y*
- 1.15%
- ALL TIME*
- 4.02%
WFBIX
- 1D
- 0.00%
- 1M
- -1.32%
- 6M
- -0.90%
- YTD
- -0.68%
- 1Y
- 1.70%
- 3Y*
- 4.99%
- 5Y*
- 0.36%
- 10Y*
- 1.68%
- ALL TIME*
- 4.16%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $0.00 | $0.00 | $0.00 | |
| $0.00 | $0.00 | $0.00 |
MNTRX vs. WFBIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
MNTRX Allspring Core Bond Fund | -0.84% | 7.16% | 1.38% | 5.37% | -13.82% | -2.10% | 8.51% | 8.18% | -0.57% | 3.28% |
WFBIX iShares U.S. Aggregate Bond Index Fund | -0.68% | 7.16% | 1.43% | 9.65% | -13.03% | -1.79% | 7.40% | 8.72% | -0.08% | 3.39% |
Correlation
The correlation between MNTRX and WFBIX is 0.94, 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. | 0.94 |
Correlation (3Y) Balances recent behavior with more history. | 0.95 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.97 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.94 |
Correlation (All Time) Calculated using the full available price history since Jun 30, 1997 | 0.92 |
The correlation between MNTRX and WFBIX has been stable across timeframes, ranging from 0.92 to 0.97 - a consistent structural relationship.
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Return for Risk
MNTRX vs. WFBIX — Risk / Return Rank
MNTRX
WFBIX
MNTRX vs. WFBIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Allspring Core Bond Fund (MNTRX) 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.
| MNTRX | WFBIX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.15 | ||
| Sortino ratioReturn per unit of downside risk | -0.22 | ||
| Omega ratioGain probability vs. loss probability | 1.11 | 1.14 | -0.03 |
| Calmar ratioReturn relative to maximum drawdown | 0.79 | 0.98 | -0.19 |
| Martin ratioReturn relative to average drawdown | 1.95 | 2.38 | -0.43 |
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Drawdowns
MNTRX vs. WFBIX - Drawdown Comparison
The maximum MNTRX drawdown since its inception was -19.36%, roughly equal to the maximum WFBIX drawdown of -18.68%. Use the drawdown chart below to compare losses from any high point for MNTRX and WFBIX.
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Drawdown Indicators
| MNTRX | WFBIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -19.36% | -18.68% | -0.68% |
Max Drawdown (1Y)Largest decline over 1 year | -3.06% | -3.02% | -0.04% |
Max Drawdown (3Y)Largest decline over 3 years | -5.21% | -5.08% | -0.13% |
Max Drawdown (5Y)Largest decline over 5 years | -18.91% | -17.84% | -1.07% |
Max Drawdown (10Y)Largest decline over 10 years | -19.36% | -18.68% | -0.68% |
Current DrawdownCurrent decline from peak | -4.24% | -2.59% | -1.65% |
Average DrawdownAverage peak-to-trough decline | -2.47% | -2.26% | -0.21% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.24% | 1.23% | +0.01% |
Volatility
MNTRX vs. WFBIX - Volatility Comparison
Allspring Core Bond Fund (MNTRX) and iShares U.S. Aggregate Bond Index Fund (WFBIX) have volatilities of 1.01% and 1.01%, 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
| MNTRX | WFBIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.01% | 1.01% | 0.00% |
Volatility (6M)Calculated over the trailing 6-month period | 3.05% | 3.00% | +0.05% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.90% | 3.84% | +0.06% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.05% | 6.41% | -0.36% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.97% | 5.17% | -0.20% |
MNTRX vs. WFBIX - Expense Ratio Comparison
MNTRX has a 0.70% expense ratio, which is higher than WFBIX's 0.05% expense ratio.
Dividends
MNTRX vs. WFBIX - Dividend Comparison
MNTRX's dividend yield for the trailing twelve months is around 3.74%, more than WFBIX's 3.65% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
MNTRX Allspring Core Bond Fund | 3.74% | 4.07% | 4.13% | 3.19% | 1.85% | 1.75% | 6.35% | 2.46% | 2.33% | 1.74% | 1.97% | 1.45% |
WFBIX iShares U.S. Aggregate Bond Index Fund | 3.65% | 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
With a correlation of 0.94, MNTRX and WFBIX 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.
WFBIX has higher volatility (1.01%) compared to MNTRX (1.01%). In terms of maximum drawdown, MNTRX dropped -19.36% vs WFBIX's -18.68%.
WFBIX currently has the higher Sharpe Ratio (0.77 vs 0.62), 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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