MFBFX vs. FXNAX
Compare and contrast key facts about MFS Corporate Bond Fund (MFBFX) and Fidelity U.S. Bond Index Fund (FXNAX).
MFBFX is managed by MFS. It was launched on May 8, 1974. FXNAX is managed by Fidelity.
Performance
MFBFX vs. FXNAX - Performance Comparison
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MFBFX vs. FXNAX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
MFBFX MFS Corporate Bond Fund | -0.85% | 7.35% | 2.03% | 8.09% | -17.27% | -1.47% | 11.01% | 14.43% | -3.19% | 6.08% |
FXNAX Fidelity U.S. Bond Index Fund | -0.26% | 7.14% | 1.35% | 5.82% | -13.55% | -2.10% | 7.63% | 8.50% | 0.04% | 3.50% |
Returns By Period
In the year-to-date period, MFBFX achieves a -0.85% return, which is significantly lower than FXNAX's -0.26% return. Over the past 10 years, MFBFX has outperformed FXNAX with an annualized return of 2.43%, while FXNAX has yielded a comparatively lower 1.54% annualized return.
MFBFX
- 1D
- 0.41%
- 1M
- -1.83%
- YTD
- -0.85%
- 6M
- -0.43%
- 1Y
- 3.87%
- 3Y*
- 4.10%
- 5Y*
- -0.04%
- 10Y*
- 2.43%
FXNAX
- 1D
- 0.19%
- 1M
- -1.60%
- YTD
- -0.26%
- 6M
- 0.47%
- 1Y
- 3.69%
- 3Y*
- 3.52%
- 5Y*
- 0.10%
- 10Y*
- 1.54%
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MFBFX vs. FXNAX - Expense Ratio Comparison
MFBFX has a 0.76% expense ratio, which is higher than FXNAX's 0.03% expense ratio.
Return for Risk
MFBFX vs. FXNAX — Risk / Return Rank
MFBFX
FXNAX
MFBFX vs. FXNAX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for MFS Corporate Bond Fund (MFBFX) and Fidelity U.S. Bond Index Fund (FXNAX). 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.
| MFBFX | FXNAX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 0.91 | 0.93 | -0.02 |
Sortino ratioReturn per unit of downside risk | 1.28 | 1.33 | -0.06 |
Omega ratioGain probability vs. loss probability | 1.16 | 1.16 | 0.00 |
Calmar ratioReturn relative to maximum drawdown | 1.45 | 1.66 | -0.21 |
Martin ratioReturn relative to average drawdown | 4.70 | 4.68 | +0.02 |
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
| MFBFX | FXNAX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.91 | 0.93 | -0.02 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | -0.01 | 0.02 | -0.02 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.43 | 0.31 | +0.12 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.48 | 0.45 | +0.03 |
Correlation
The correlation between MFBFX and FXNAX is 0.89, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.
Dividends
MFBFX vs. FXNAX - Dividend Comparison
MFBFX's dividend yield for the trailing twelve months is around 4.25%, more than FXNAX's 3.34% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
MFBFX MFS Corporate Bond Fund | 4.25% | 4.54% | 3.74% | 3.16% | 2.46% | 5.61% | 3.47% | 3.01% | 3.15% | 3.07% | 3.27% | 4.16% |
FXNAX Fidelity U.S. Bond Index Fund | 3.34% | 3.58% | 3.40% | 3.15% | 1.81% | 1.74% | 2.92% | 2.68% | 2.74% | 2.57% | 2.76% | 2.52% |
Drawdowns
MFBFX vs. FXNAX - Drawdown Comparison
The maximum MFBFX drawdown since its inception was -29.78%, which is greater than FXNAX's maximum drawdown of -19.51%. Use the drawdown chart below to compare losses from any high point for MFBFX and FXNAX.
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Drawdown Indicators
| MFBFX | FXNAX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -29.78% | -19.51% | -10.27% |
Max Drawdown (1Y)Largest decline over 1 year | -3.23% | -2.71% | -0.52% |
Max Drawdown (5Y)Largest decline over 5 years | -23.44% | -18.54% | -4.90% |
Max Drawdown (10Y)Largest decline over 10 years | -23.44% | -19.51% | -3.93% |
Current DrawdownCurrent decline from peak | -4.37% | -3.53% | -0.84% |
Average DrawdownAverage peak-to-trough decline | -6.20% | -3.87% | -2.33% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.00% | 0.96% | +0.04% |
Volatility
MFBFX vs. FXNAX - Volatility Comparison
MFS Corporate Bond Fund (MFBFX) has a higher volatility of 1.76% compared to Fidelity U.S. Bond Index Fund (FXNAX) at 1.55%. This indicates that MFBFX's price experiences larger fluctuations and is considered to be riskier than FXNAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| MFBFX | FXNAX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.76% | 1.55% | +0.21% |
Volatility (6M)Calculated over the trailing 6-month period | 2.72% | 2.58% | +0.14% |
Volatility (1Y)Calculated over the trailing 1-year period | 4.59% | 4.35% | +0.24% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.38% | 6.04% | +0.34% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.72% | 4.99% | +0.73% |