MRBIX vs. WOBDX
MRBIX (MFS Total Return Bond Fund) and WOBDX (JPMorgan Core Bond Fund) are both mutual funds - MRBIX is a Intermediate Core-Plus Bond fund managed by MFS, while WOBDX is a Intermediate Core Bond fund managed by JPMorgan. Over the past 10 years, MRBIX returned 1.91%/yr vs 1.83%/yr for WOBDX. Their correlation of 0.88 suggests significant overlap in exposure. MRBIX charges 0.45%/yr vs 0.50%/yr for WOBDX.
Performance
MRBIX vs. WOBDX - Performance Comparison
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Returns By Period
In the year-to-date period, MRBIX achieves a 0.31% return, which is significantly higher than WOBDX's 0.25% return. Both investments have delivered pretty close results over the past 10 years, with MRBIX having a 1.91% annualized return and WOBDX not far behind at 1.83%.
MRBIX
- 1D
- -0.21%
- 1M
- 0.66%
- YTD
- 0.31%
- 6M
- 0.68%
- 1Y
- 4.56%
- 3Y*
- 4.28%
- 5Y*
- 0.06%
- 10Y*
- 1.91%
WOBDX
- 1D
- -0.29%
- 1M
- 0.54%
- YTD
- 0.25%
- 6M
- 0.30%
- 1Y
- 4.11%
- 3Y*
- 4.11%
- 5Y*
- 0.37%
- 10Y*
- 1.83%
MRBIX vs. WOBDX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
MRBIX MFS Total Return Bond Fund | 0.31% | 7.35% | 1.77% | 6.45% | -14.52% | -0.84% | 8.83% | 9.96% | -1.03% | 4.15% |
WOBDX JPMorgan Core Bond Fund | 0.25% | 7.38% | 1.97% | 5.79% | -12.35% | -1.11% | 8.13% | 8.34% | 0.20% | 3.81% |
Correlation
The correlation between MRBIX and WOBDX is 0.91, 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 | 0.91 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.94 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.95 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.91 |
Correlation (All Time) Calculated using the full available price history since Dec 31, 1998 | 0.88 |
The correlation between MRBIX and WOBDX has been stable across timeframes, ranging from 0.88 to 0.95 - a consistent structural relationship.
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Return for Risk
MRBIX vs. WOBDX — Risk / Return Rank
MRBIX
WOBDX
MRBIX vs. WOBDX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for MFS Total Return Bond Fund (MRBIX) and JPMorgan Core Bond Fund (WOBDX). 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.
| MRBIX | WOBDX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.13 | ||
| Sortino ratioReturn per unit of downside risk | +0.21 | ||
| Omega ratioGain probability vs. loss probability | 1.22 | 1.20 | +0.03 |
| Calmar ratioReturn relative to maximum drawdown | 1.73 | 1.45 | +0.28 |
| Martin ratioReturn relative to average drawdown | 4.79 | 4.04 | +0.75 |
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Drawdowns
MRBIX vs. WOBDX - Drawdown Comparison
The maximum MRBIX drawdown since its inception was -19.25%, which is greater than WOBDX's maximum drawdown of -16.65%. Use the drawdown chart below to compare losses from any high point for MRBIX and WOBDX.
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Drawdown Indicators
| MRBIX | WOBDX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -19.25% | -16.65% | -2.60% |
Max Drawdown (1Y)Largest decline over 1 year | -2.77% | -2.99% | +0.22% |
Max Drawdown (3Y)Largest decline over 3 years | -6.29% | -5.96% | -0.33% |
Max Drawdown (5Y)Largest decline over 5 years | -19.25% | -16.65% | -2.60% |
Max Drawdown (10Y)Largest decline over 10 years | -19.25% | -16.65% | -2.60% |
Current DrawdownCurrent decline from peak | -1.50% | -1.80% | +0.30% |
Average DrawdownAverage peak-to-trough decline | -2.47% | -1.90% | -0.57% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.00% | 1.07% | -0.07% |
Volatility
MRBIX vs. WOBDX - Volatility Comparison
MFS Total Return Bond Fund (MRBIX) has a higher volatility of 1.14% compared to JPMorgan Core Bond Fund (WOBDX) at 1.07%. This indicates that MRBIX's price experiences larger fluctuations and is considered to be riskier than WOBDX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| MRBIX | WOBDX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.14% | 1.07% | +0.07% |
Volatility (6M)Calculated over the trailing 6-month period | 2.80% | 2.82% | -0.02% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.79% | 3.82% | -0.03% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 5.74% | 5.70% | +0.04% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.93% | 4.71% | +0.22% |
MRBIX vs. WOBDX - Expense Ratio Comparison
MRBIX has a 0.45% expense ratio, which is lower than WOBDX's 0.50% expense ratio.
Dividends
MRBIX vs. WOBDX - Dividend Comparison
MRBIX's dividend yield for the trailing twelve months is around 4.17%, more than WOBDX's 4.07% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
MRBIX MFS Total Return Bond Fund | 4.17% | 4.21% | 3.69% | 3.42% | 2.39% | 3.42% | 3.00% | 3.06% | 2.87% | 2.65% | 3.02% | 3.76% |
WOBDX JPMorgan Core Bond Fund | 4.07% | 3.97% | 3.95% | 3.51% | 2.68% | 2.82% | 4.00% | 3.23% | 2.91% | 2.88% | 2.84% | 2.54% |
Frequently Asked Questions
With a correlation of 0.91, MRBIX and WOBDX 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.
MRBIX has higher volatility (1.14%) compared to WOBDX (1.07%). In terms of maximum drawdown, MRBIX dropped -19.25% vs WOBDX's -16.65%.
MRBIX currently has the higher Sharpe Ratio (1.27 vs 1.14), 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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