MFBFX vs. IVV
MFBFX (MFS Corporate Bond Fund) and IVV (iShares Core S&P 500 ETF) are both funds - MFBFX is a Corporate Bonds fund managed by MFS, while IVV is a S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, MFBFX returned 2.40%/yr vs 15.75%/yr for IVV. At a correlation of -0.08, they often move in opposite directions. MFBFX charges 0.76%/yr vs 0.03%/yr for IVV.
Performance
MFBFX vs. IVV - Performance Comparison
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Returns By Period
In the year-to-date period, MFBFX achieves a 0.70% return, which is significantly lower than IVV's 9.76% return. Over the past 10 years, MFBFX has underperformed IVV with an annualized return of 2.40%, while IVV has yielded a comparatively higher 15.75% annualized return.
MFBFX
- 1D
- 0.24%
- 1M
- 1.02%
- YTD
- 0.70%
- 6M
- 1.08%
- 1Y
- 5.37%
- 3Y*
- 4.90%
- 5Y*
- -0.25%
- 10Y*
- 2.40%
IVV
- 1D
- -0.31%
- 1M
- 0.09%
- YTD
- 9.76%
- 6M
- 9.30%
- 1Y
- 26.83%
- 3Y*
- 21.37%
- 5Y*
- 13.58%
- 10Y*
- 15.75%
MFBFX vs. IVV - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
MFBFX MFS Corporate Bond Fund | 0.70% | 7.35% | 2.03% | 8.09% | -17.27% | -1.47% | 11.01% | 14.43% | -3.19% | 6.08% |
IVV iShares Core S&P 500 ETF | 9.76% | 17.85% | 24.93% | 26.31% | -18.16% | 28.76% | 18.40% | 31.07% | -4.49% | 21.75% |
Correlation
The correlation between MFBFX and IVV is 0.39, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.39 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.28 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.23 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.08 |
Correlation (All Time) Calculated using the full available price history since May 19, 2000 | -0.08 |
The correlation between MFBFX and IVV shifts across timeframes, from -0.08 (all time) to 0.39 (1 year), reflecting how their relationship changes across market environments.
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Return for Risk
MFBFX vs. IVV — Risk / Return Rank
MFBFX
IVV
MFBFX vs. IVV - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for MFS Corporate Bond Fund (MFBFX) and iShares Core S&P 500 ETF (IVV). 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.
| MFBFX | IVV | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.83 | ||
| Sortino ratioReturn per unit of downside risk | -0.94 | ||
| Omega ratioGain probability vs. loss probability | 1.24 | 1.39 | -0.16 |
| Calmar ratioReturn relative to maximum drawdown | 1.73 | 3.03 | -1.30 |
| Martin ratioReturn relative to average drawdown | 5.65 | 13.61 | -7.97 |
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Drawdowns
MFBFX vs. IVV - Drawdown Comparison
The maximum MFBFX drawdown since its inception was -29.78%, smaller than the maximum IVV drawdown of -55.25%. Use the drawdown chart below to compare losses from any high point for MFBFX and IVV.
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Drawdown Indicators
| MFBFX | IVV | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -29.78% | -55.25% | +25.47% |
Max Drawdown (1Y)Largest decline over 1 year | -3.17% | -8.89% | +5.72% |
Max Drawdown (3Y)Largest decline over 3 years | -6.83% | -18.75% | +11.92% |
Max Drawdown (5Y)Largest decline over 5 years | -23.44% | -24.53% | +1.09% |
Max Drawdown (10Y)Largest decline over 10 years | -23.44% | -33.90% | +10.46% |
Current DrawdownCurrent decline from peak | -2.87% | -1.74% | -1.13% |
Average DrawdownAverage peak-to-trough decline | -6.19% | -10.76% | +4.57% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.97% | 1.98% | -1.01% |
Volatility
MFBFX vs. IVV - Volatility Comparison
The current volatility for MFS Corporate Bond Fund (MFBFX) is 1.21%, while iShares Core S&P 500 ETF (IVV) has a volatility of 4.67%. This indicates that MFBFX experiences smaller price fluctuations and is considered to be less risky than IVV based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| MFBFX | IVV | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.21% | 4.67% | -3.46% |
Volatility (6M)Calculated over the trailing 6-month period | 3.07% | 9.75% | -6.68% |
Volatility (1Y)Calculated over the trailing 1-year period | 4.08% | 12.41% | -8.33% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.40% | 16.97% | -10.57% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.74% | 18.10% | -12.36% |
MFBFX vs. IVV - Expense Ratio Comparison
MFBFX has a 0.76% expense ratio, which is higher than IVV's 0.03% expense ratio.
Dividends
MFBFX vs. IVV - Dividend Comparison
MFBFX's dividend yield for the trailing twelve months is around 4.53%, more than IVV's 1.09% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
IVV iShares Core S&P 500 ETF | 1.09% | 1.17% | 1.30% | 1.44% | 1.66% | 1.20% | 1.57% | 1.85% | 2.21% | 1.75% | 2.01% | 2.27% |
MFBFX MFS Corporate Bond Fund | 4.53% | 4.54% | 3.74% | 3.16% | 2.46% | 5.61% | 3.47% | 3.01% | 3.15% | 3.07% | 3.27% | 4.16% |
Frequently Asked Questions
MFBFX and IVV have a correlation of 0.39, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
IVV has higher volatility (4.67%) compared to MFBFX (1.21%). In terms of maximum drawdown, MFBFX dropped -29.78% vs IVV's -55.25%.
IVV currently has the higher Sharpe Ratio (2.18 vs 1.34), 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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