MCBDX vs. FEDUX

Last updated Jun 24, 2026

MCBDX (MassMutual Core Bond Fund) and FEDUX (Fidelity Education Income Fund) are both Intermediate Core Bond funds. Over the past 5 years, MCBDX returned 6.55%/yr vs -0.44%/yr for FEDUX. Their correlation of 0.85 suggests significant overlap in exposure. MCBDX charges 0.52%/yr vs 0.00%/yr for FEDUX.

Performance

MCBDX vs. FEDUX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MassMutual Core Bond Fund (MCBDX) and Fidelity Education Income Fund (FEDUX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MCBDX achieves a 0.63% return, which is significantly higher than FEDUX's 0.02% return.

MCBDX

• 1D: -0.33%
• 1M: 0.68%
• YTD: 0.63%
• 6M: 1.13%
• 1Y: 5.60%
• 3Y*: 4.71%
• 5Y*: 6.55%
• 10Y*: 5.31%

FEDUX

• 1D: -0.11%
• 1M: 0.25%
• YTD: 0.02%
• 6M: 0.49%
• 1Y: 3.31%
• 3Y*: 2.62%
• 5Y*: -0.44%
• 10Y*: —

*Multi-year figures are annualized to reflect compound growth (CAGR)

MCBDX vs. FEDUX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
MCBDX MassMutual Core Bond Fund	0.63%	8.03%	1.13%	6.64%	-15.29%	39.37%
FEDUX Fidelity Education Income Fund	0.02%	6.40%	-0.29%	1.62%	-8.38%	-1.27%

Correlation

The correlation between MCBDX and FEDUX is 0.84, 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	0.84
Correlation (3Y) Calculated over the trailing 3-year period	0.86
Correlation (5Y) Calculated over the trailing 5-year period	0.85
Correlation (All Time) Calculated using the full available price history since May 25, 2021	0.85

The correlation between MCBDX and FEDUX has been stable across timeframes, ranging from 0.84 to 0.86 - a consistent structural relationship.

Return for Risk

MCBDX vs. FEDUX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

MCBDX

MCBDX Risk / Return Rank: 33
MCBDX Sharpe Ratio Rank: 33
MCBDX Sortino Ratio Rank: 37
MCBDX Omega Ratio Rank: 32
MCBDX Calmar Ratio Rank: 33
MCBDX Martin Ratio Rank: 31

FEDUX

FEDUX Risk / Return Rank: 30
FEDUX Sharpe Ratio Rank: 27
FEDUX Sortino Ratio Rank: 33
FEDUX Omega Ratio Rank: 30
FEDUX Calmar Ratio Rank: 32
FEDUX Martin Ratio Rank: 27

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

MCBDX vs. FEDUX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MassMutual Core Bond Fund (MCBDX) and Fidelity Education Income Fund (FEDUX). 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	FEDUX	Difference
Sharpe ratio: Return per unit of total volatility	1.53	1.38	+0.16
Sortino ratio: Return per unit of downside risk	2.33	2.22	+0.11
Omega ratio: Gain probability vs. loss probability	1.28	1.27	+0.01
Calmar ratio: Return relative to maximum drawdown	2.04	2.00	+0.04
Martin ratio: Return relative to average drawdown	6.65	5.97	+0.68

MCBDX vs. FEDUX - Sharpe Ratio Comparison

The current MCBDX Sharpe Ratio is 1.53, which is comparable to the FEDUX Sharpe Ratio of 1.38. The chart below compares the historical Sharpe Ratios of MCBDX and FEDUX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

MCBDX vs. FEDUX - Drawdown Comparison

The maximum MCBDX drawdown since its inception was -22.01%, which is greater than FEDUX's maximum drawdown of -12.00%. Use the drawdown chart below to compare losses from any high point for MCBDX and FEDUX.

Drawdown Indicators

	MCBDX	FEDUX	Difference
Max Drawdown Largest peak-to-trough decline	-22.01%	-12.00%	-10.01%
Max Drawdown (1Y) Largest decline over 1 year	-2.87%	-1.72%	-1.15%
Max Drawdown (3Y) Largest decline over 3 years	-5.34%	-2.80%	-2.54%
Max Drawdown (5Y) Largest decline over 5 years	-22.01%	-12.00%	-10.01%
Max Drawdown (10Y) Largest decline over 10 years	-22.01%	—	—
Current Drawdown Current decline from peak	-4.36%	-2.76%	-1.60%
Average Drawdown Average peak-to-trough decline	-3.53%	-6.42%	+2.89%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.88%	0.57%	+0.31%

Volatility

MCBDX vs. FEDUX - Volatility Comparison

MassMutual Core Bond Fund (MCBDX) has a higher volatility of 1.06% compared to Fidelity Education Income Fund (FEDUX) at 0.83%. This indicates that MCBDX's price experiences larger fluctuations and is considered to be riskier than FEDUX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MCBDX	FEDUX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.06%	0.83%	+0.23%
Volatility (6M) Calculated over the trailing 6-month period	2.84%	1.83%	+1.01%
Volatility (1Y) Calculated over the trailing 1-year period	3.83%	2.50%	+1.33%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	20.11%	3.14%	+16.97%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	14.45%	3.12%	+11.33%

MCBDX vs. FEDUX - Expense Ratio Comparison

MCBDX has a 0.52% expense ratio, which is higher than FEDUX's 0.00% expense ratio.

Dividends

MCBDX vs. FEDUX - Dividend Comparison

MCBDX's dividend yield for the trailing twelve months is around 4.48%, more than FEDUX's 4.40% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FEDUX Fidelity Education Income Fund	4.40%	4.43%	0.36%	0.71%	0.00%	0.13%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
MCBDX MassMutual Core Bond Fund	4.48%	4.50%	1.93%	4.62%	3.83%	31.12%	5.98%	3.35%	3.32%	2.96%	3.29%	1.43%

Frequently Asked Questions

Can I hold both MCBDX and FEDUX in my portfolio?

MCBDX and FEDUX have a correlation of 0.84, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MCBDX or FEDUX?

MCBDX has higher volatility (1.06%) compared to FEDUX (0.83%). In terms of maximum drawdown, MCBDX dropped -22.01% vs FEDUX's -12.00%.

Which has better risk-adjusted returns?

MCBDX currently has the higher Sharpe Ratio (1.53 vs 1.38), 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.