MCBDX vs. RBFFX
MCBDX (MassMutual Core Bond Fund) and RBFFX (American Funds The Bond Fund of America) are both Intermediate Core Bond funds. Over the past 10 years, MCBDX returned 5.10%/yr vs 1.74%/yr for RBFFX. Their correlation of 0.88 means they have usually moved in the same direction. MCBDX charges 0.52%/yr vs 0.29%/yr for RBFFX.
Performance
MCBDX vs. RBFFX - Performance Comparison
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Returns By Period
In the year-to-date period, MCBDX achieves a -0.29% return, which is significantly higher than RBFFX's -1.20% return. Over the past 10 years, MCBDX has outperformed RBFFX with an annualized return of 5.10%, while RBFFX has yielded a comparatively lower 1.74% annualized return.
MCBDX
- 1D
- -0.22%
- 1M
- -1.41%
- 6M
- -0.53%
- YTD
- -0.29%
- 1Y
- 2.80%
- 3Y*
- 4.58%
- 5Y*
- 6.04%
- 10Y*
- 5.10%
- ALL TIME*
- 4.67%
RBFFX
- 1D
- -0.27%
- 1M
- -1.51%
- 6M
- -1.29%
- YTD
- -1.20%
- 1Y
- 1.35%
- 3Y*
- 3.77%
- 5Y*
- -0.50%
- 10Y*
- 1.74%
- ALL TIME*
- 3.34%
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 |
MCBDX vs. RBFFX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
MCBDX MassMutual Core Bond Fund | -0.29% | 8.03% | 1.13% | 6.64% | -15.29% | 38.26% | 8.42% | 9.62% | -0.48% | 4.60% |
RBFFX American Funds The Bond Fund of America | -1.20% | 7.49% | 1.47% | 4.65% | -13.03% | -0.64% | 11.07% | 8.13% | 0.17% | 3.53% |
Correlation
The correlation between MCBDX and RBFFX is 0.95, 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. | 0.95 |
Correlation (3Y) Balances recent behavior with more history. | 0.94 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.94 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.92 |
Correlation (All Time) Calculated using the full available price history since Jan 2, 2003 | 0.88 |
The correlation between MCBDX and RBFFX has been stable across timeframes, ranging from 0.88 to 0.95 - a consistent structural relationship.
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Return for Risk
MCBDX vs. RBFFX — Risk / Return Rank
MCBDX
RBFFX
MCBDX vs. RBFFX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for MassMutual Core Bond Fund (MCBDX) and American Funds The Bond Fund of America (RBFFX). 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.
| MCBDX | RBFFX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.36 | ||
| Sortino ratioReturn per unit of downside risk | +0.53 | ||
| Omega ratioGain probability vs. loss probability | 1.16 | 1.10 | +0.06 |
| Calmar ratioReturn relative to maximum drawdown | 1.21 | 0.70 | +0.51 |
| Martin ratioReturn relative to average drawdown | 3.68 | 1.70 | +1.98 |
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Drawdowns
MCBDX vs. RBFFX - Drawdown Comparison
The maximum MCBDX drawdown since its inception was -22.01%, which is greater than RBFFX's maximum drawdown of -17.62%. Use the drawdown chart below to compare losses from any high point for MCBDX and RBFFX.
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Drawdown Indicators
| MCBDX | RBFFX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -22.01% | -17.62% | -4.39% |
Max Drawdown (1Y)Largest decline over 1 year | -2.87% | -3.09% | +0.22% |
Max Drawdown (3Y)Largest decline over 3 years | -4.56% | -5.10% | +0.54% |
Max Drawdown (5Y)Largest decline over 5 years | -22.01% | -17.62% | -4.39% |
Max Drawdown (10Y)Largest decline over 10 years | -22.01% | -17.62% | -4.39% |
Current DrawdownCurrent decline from peak | -5.23% | -2.89% | -2.34% |
Average DrawdownAverage peak-to-trough decline | -3.54% | -2.80% | -0.74% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.95% | 1.27% | -0.32% |
Volatility
MCBDX vs. RBFFX - Volatility Comparison
MassMutual Core Bond Fund (MCBDX) and American Funds The Bond Fund of America (RBFFX) have volatilities of 1.00% and 0.97%, 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
| MCBDX | RBFFX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.00% | 0.97% | +0.03% |
Volatility (6M)Calculated over the trailing 6-month period | 2.95% | 3.04% | -0.09% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.76% | 3.81% | -0.05% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 20.11% | 5.98% | +14.13% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 14.45% | 4.90% | +9.55% |
MCBDX vs. RBFFX - Expense Ratio Comparison
MCBDX has a 0.52% expense ratio, which is higher than RBFFX's 0.29% expense ratio.
Dividends
MCBDX vs. RBFFX - Dividend Comparison
MCBDX's dividend yield for the trailing twelve months is around 4.16%, which matches RBFFX's 4.13% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
MCBDX MassMutual Core Bond Fund | 4.16% | 4.50% | 1.93% | 4.62% | 3.83% | 31.12% | 5.98% | 3.35% | 3.32% | 2.96% | 3.29% | 1.43% |
RBFFX American Funds The Bond Fund of America | 4.13% | 4.43% | 4.61% | 3.53% | 2.42% | 2.31% | 5.34% | 3.76% | 2.67% | 2.14% | 2.07% | 2.30% |
Frequently Asked Questions
With a correlation of 0.95, MCBDX and RBFFX 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.
MCBDX has higher volatility (1.00%) compared to RBFFX (0.97%). In terms of maximum drawdown, MCBDX dropped -22.01% vs RBFFX's -17.62%.
MCBDX currently has the higher Sharpe Ratio (0.93 vs 0.57), 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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