MFBFX vs. VSTBX
Compare and contrast key facts about MFS Corporate Bond Fund (MFBFX) and Vanguard Short-Term Corporate Bond Index Fund Institutional Shares (VSTBX).
MFBFX is managed by MFS. It was launched on May 8, 1974. VSTBX is managed by Vanguard. It was launched on Nov 19, 2009.
Performance
MFBFX vs. VSTBX - Performance Comparison
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MFBFX vs. VSTBX - 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% |
VSTBX Vanguard Short-Term Corporate Bond Index Fund Institutional Shares | 0.10% | 6.75% | 5.37% | 6.17% | -5.73% | -0.41% | 5.07% | 9.68% | 0.92% | 2.48% |
Returns By Period
In the year-to-date period, MFBFX achieves a -0.85% return, which is significantly lower than VSTBX's 0.10% return. Over the past 10 years, MFBFX has underperformed VSTBX with an annualized return of 2.43%, while VSTBX has yielded a comparatively higher 3.03% 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%
VSTBX
- 1D
- 0.19%
- 1M
- -0.68%
- YTD
- 0.10%
- 6M
- 1.15%
- 1Y
- 4.78%
- 3Y*
- 5.52%
- 5Y*
- 2.44%
- 10Y*
- 3.03%
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MFBFX vs. VSTBX - Expense Ratio Comparison
MFBFX has a 0.76% expense ratio, which is higher than VSTBX's 0.05% expense ratio.
Return for Risk
MFBFX vs. VSTBX — Risk / Return Rank
MFBFX
VSTBX
MFBFX vs. VSTBX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for MFS Corporate Bond Fund (MFBFX) and Vanguard Short-Term Corporate Bond Index Fund Institutional Shares (VSTBX). 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 | VSTBX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 0.91 | 2.47 | -1.56 |
Sortino ratioReturn per unit of downside risk | 1.28 | 3.67 | -2.40 |
Omega ratioGain probability vs. loss probability | 1.16 | 1.51 | -0.34 |
Calmar ratioReturn relative to maximum drawdown | 1.45 | 3.75 | -2.29 |
Martin ratioReturn relative to average drawdown | 4.70 | 14.63 | -9.93 |
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 | VSTBX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.91 | 2.47 | -1.56 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | -0.01 | 0.91 | -0.92 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.43 | 1.28 | -0.85 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.48 | 1.46 | -0.99 |
Correlation
The correlation between MFBFX and VSTBX is 0.78, 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. VSTBX - Dividend Comparison
MFBFX's dividend yield for the trailing twelve months is around 4.25%, more than VSTBX's 4.04% 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% |
VSTBX Vanguard Short-Term Corporate Bond Index Fund Institutional Shares | 4.04% | 4.34% | 4.29% | 3.09% | 2.00% | 1.80% | 2.27% | 5.40% | 2.67% | 2.27% | 1.96% | 2.25% |
Drawdowns
MFBFX vs. VSTBX - Drawdown Comparison
The maximum MFBFX drawdown since its inception was -29.78%, which is greater than VSTBX's maximum drawdown of -9.34%. Use the drawdown chart below to compare losses from any high point for MFBFX and VSTBX.
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Drawdown Indicators
| MFBFX | VSTBX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -29.78% | -9.34% | -20.44% |
Max Drawdown (1Y)Largest decline over 1 year | -3.23% | -1.31% | -1.92% |
Max Drawdown (5Y)Largest decline over 5 years | -23.44% | -9.34% | -14.10% |
Max Drawdown (10Y)Largest decline over 10 years | -23.44% | -9.34% | -14.10% |
Current DrawdownCurrent decline from peak | -4.37% | -0.86% | -3.51% |
Average DrawdownAverage peak-to-trough decline | -6.20% | -0.96% | -5.24% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.00% | 0.34% | +0.66% |
Volatility
MFBFX vs. VSTBX - Volatility Comparison
MFS Corporate Bond Fund (MFBFX) has a higher volatility of 1.76% compared to Vanguard Short-Term Corporate Bond Index Fund Institutional Shares (VSTBX) at 0.78%. This indicates that MFBFX's price experiences larger fluctuations and is considered to be riskier than VSTBX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| MFBFX | VSTBX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.76% | 0.78% | +0.98% |
Volatility (6M)Calculated over the trailing 6-month period | 2.72% | 1.17% | +1.55% |
Volatility (1Y)Calculated over the trailing 1-year period | 4.59% | 1.98% | +2.61% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.38% | 2.70% | +3.68% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.72% | 2.37% | +3.35% |