MCFIX vs. MRBIX

Last updated Jun 4, 2026

MCFIX (Mercer Core Fixed Income Fund) and MRBIX (MFS Total Return Bond Fund) are both Intermediate Core-Plus Bond funds. Over the past 5 years, MCFIX returned -0.03%/yr vs 0.23%/yr for MRBIX. Their correlation of 0.89 suggests significant overlap in exposure. MCFIX charges 0.16%/yr vs 0.45%/yr for MRBIX.

Performance

MCFIX vs. MRBIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Mercer Core Fixed Income Fund (MCFIX) and MFS Total Return Bond Fund (MRBIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MCFIX achieves a -1.10% return, which is significantly lower than MRBIX's 0.52% return.

MCFIX

• 1D: 0.00%
• 1M: 0.11%
• YTD: -1.10%
• 6M: -1.02%
• 1Y: 3.23%
• 3Y*: 3.77%
• 5Y*: -0.03%
• 10Y*: —

MRBIX

• 1D: 0.00%
• 1M: 0.55%
• YTD: 0.52%
• 6M: 0.48%
• 1Y: 5.67%
• 3Y*: 4.35%
• 5Y*: 0.23%
• 10Y*: 1.97%

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

MCFIX vs. MRBIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
MCFIX Mercer Core Fixed Income Fund	-1.10%	6.64%	2.02%	6.47%	-13.69%	-1.05%	4.75%	3.31%
MRBIX MFS Total Return Bond Fund	0.52%	7.35%	1.77%	6.45%	-14.52%	-0.84%	8.83%	6.31%

Correlation

The correlation between MCFIX and MRBIX is 0.83, 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	0.83
Correlation (3Y) Calculated over the trailing 3-year period	0.89
Correlation (5Y) Calculated over the trailing 5-year period	0.93
Correlation (All Time) Calculated using the full available price history since Apr 15, 2019	0.89

The correlation between MCFIX and MRBIX has been stable across timeframes, ranging from 0.83 to 0.93 - a consistent structural relationship.

Return for Risk

MCFIX vs. MRBIX — Risk / Return Rank

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

MCFIX

MCFIX Risk / Return Rank: 10
MCFIX Sharpe Ratio Rank: 11
MCFIX Sortino Ratio Rank: 11
MCFIX Omega Ratio Rank: 11
MCFIX Calmar Ratio Rank: 10
MCFIX Martin Ratio Rank: 9

MRBIX

MRBIX Risk / Return Rank: 27
MRBIX Sharpe Ratio Rank: 27
MRBIX Sortino Ratio Rank: 29
MRBIX Omega Ratio Rank: 26
MRBIX Calmar Ratio Rank: 30
MRBIX Martin Ratio Rank: 25

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.

MCFIX vs. MRBIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Mercer Core Fixed Income Fund (MCFIX) and MFS Total Return Bond Fund (MRBIX). 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.

	MCFIX	MRBIX	Difference
Sharpe ratio Return per unit of total volatility	0.89	1.48	-0.59
Sortino ratio Return per unit of downside risk	1.31	2.24	-0.93
Omega ratio Gain probability vs. loss probability	1.16	1.27	-0.11
Calmar ratio Return relative to maximum drawdown	0.98	2.06	-1.08
Martin ratio Return relative to average drawdown	2.80	6.03	-3.23
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MCFIX vs. MRBIX - Sharpe Ratio Comparison

The current MCFIX Sharpe Ratio is 0.89, which is lower than the MRBIX Sharpe Ratio of 1.48. The chart below compares the historical Sharpe Ratios of MCFIX and MRBIX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	MCFIX	MRBIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.89	1.48	-0.59
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.00	0.04	-0.04
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.40	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.14	0.97	-0.84

Drawdowns

MCFIX vs. MRBIX - Drawdown Comparison

The maximum MCFIX drawdown since its inception was -21.68%, which is greater than MRBIX's maximum drawdown of -19.25%. Use the drawdown chart below to compare losses from any high point for MCFIX and MRBIX.

Drawdown Indicators

	MCFIX	MRBIX	Difference
Max Drawdown Largest peak-to-trough decline	-21.68%	-19.25%	-2.43%
Max Drawdown (1Y) Largest decline over 1 year	-3.75%	-2.77%	-0.98%
Max Drawdown (3Y) Largest decline over 3 years	-6.32%	-6.29%	-0.03%
Max Drawdown (5Y) Largest decline over 5 years	-18.72%	-19.25%	+0.53%
Max Drawdown (10Y) Largest decline over 10 years	—	-19.25%	—
Current Drawdown Current decline from peak	-6.08%	-1.29%	-4.79%
Average Drawdown Average peak-to-trough decline	-8.54%	-2.47%	-6.07%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.27%	0.94%	+0.33%

Volatility

MCFIX vs. MRBIX - Volatility Comparison

Mercer Core Fixed Income Fund (MCFIX) and MFS Total Return Bond Fund (MRBIX) have volatilities of 1.32% and 1.35%, 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.

Volatility by Period

	MCFIX	MRBIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.32%	1.35%	-0.03%
Volatility (6M) Calculated over the trailing 6-month period	2.77%	2.73%	+0.04%
Volatility (1Y) Calculated over the trailing 1-year period	4.12%	3.86%	+0.26%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.04%	5.73%	+0.31%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	6.12%	4.92%	+1.20%

MCFIX vs. MRBIX - Expense Ratio Comparison

MCFIX has a 0.16% expense ratio, which is lower than MRBIX's 0.45% expense ratio.

Dividends

MCFIX vs. MRBIX - Dividend Comparison

MCFIX's dividend yield for the trailing twelve months is around 4.31%, more than MRBIX's 4.17% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MCFIX Mercer Core Fixed Income Fund	4.31%	3.89%	4.54%	3.68%	3.31%	2.45%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
MRBIX MFS Total Return Bond Fund	4.17%	4.21%	3.69%	3.42%	2.39%	3.42%	3.00%	3.06%	2.87%	2.65%	3.02%	3.76%

Frequently Asked Questions

Can I hold both MCFIX and MRBIX in my portfolio?

MCFIX and MRBIX have a correlation of 0.83, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MCFIX or MRBIX?

MRBIX has higher volatility (1.35%) compared to MCFIX (1.32%). In terms of maximum drawdown, MCFIX dropped -21.68% vs MRBIX's -19.25%.

Which has better risk-adjusted returns?

MRBIX currently has the higher Sharpe Ratio (1.48 vs 0.89), 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.