MFEKX vs. MRGAX

Last updated Jun 4, 2026

MFEKX (MFS Growth R6) and MRGAX (MFS Core Equity Fund) are both mutual funds - MFEKX is a Large Cap Growth Equities fund actively managed by MFS, while MRGAX is a Large Cap Blend Equities fund managed by MFS. Over the past 10 years, MFEKX returned 17.77%/yr vs 14.22%/yr for MRGAX. Their correlation of 0.92 suggests significant overlap in exposure. MFEKX charges 0.51%/yr vs 0.93%/yr for MRGAX.

Performance

MFEKX vs. MRGAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MFS Growth R6 (MFEKX) and MFS Core Equity Fund (MRGAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MFEKX achieves a 6.33% return, which is significantly lower than MRGAX's 8.17% return. Over the past 10 years, MFEKX has outperformed MRGAX with an annualized return of 17.77%, while MRGAX has yielded a comparatively lower 14.22% annualized return.

MFEKX

• 1D: -0.34%
• 1M: 4.76%
• YTD: 6.33%
• 6M: 6.01%
• 1Y: 17.76%
• 3Y*: 26.68%
• 5Y*: 14.46%
• 10Y*: 17.77%

MRGAX

• 1D: -0.17%
• 1M: 3.29%
• YTD: 8.17%
• 6M: 8.03%
• 1Y: 20.03%
• 3Y*: 17.77%
• 5Y*: 10.65%
• 10Y*: 14.22%

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

MFEKX vs. MRGAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MFEKX MFS Growth R6	6.33%	12.44%	49.62%	36.27%	-31.07%	23.71%	31.77%	37.82%	2.40%	30.97%
MRGAX MFS Core Equity Fund	8.17%	12.33%	20.01%	22.88%	-17.24%	25.26%	18.56%	34.66%	-4.12%	23.79%

Correlation

The correlation between MFEKX and MRGAX is 0.88, 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	0.88
Correlation (3Y) Calculated over the trailing 3-year period	0.88
Correlation (5Y) Calculated over the trailing 5-year period	0.92
Correlation (10Y) Calculated over the trailing 10-year period	0.91
Correlation (All Time) Calculated using the full available price history since Aug 29, 2011	0.92

The correlation between MFEKX and MRGAX has been stable across timeframes, ranging from 0.88 to 0.92 - a consistent structural relationship.

Return for Risk

MFEKX vs. MRGAX — Risk / Return Rank

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

MFEKX

MFEKX Risk / Return Rank: 14
MFEKX Sharpe Ratio Rank: 17
MFEKX Sortino Ratio Rank: 15
MFEKX Omega Ratio Rank: 16
MFEKX Calmar Ratio Rank: 11
MFEKX Martin Ratio Rank: 12

MRGAX

MRGAX Risk / Return Rank: 36
MRGAX Sharpe Ratio Rank: 36
MRGAX Sortino Ratio Rank: 34
MRGAX Omega Ratio Rank: 35
MRGAX Calmar Ratio Rank: 33
MRGAX Martin Ratio Rank: 43

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.

MFEKX vs. MRGAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS Growth R6 (MFEKX) and MFS Core Equity Fund (MRGAX). 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.

	MFEKX	MRGAX	Difference
Sharpe ratio: Return per unit of total volatility	1.16	1.74	-0.58
Sortino ratio: Return per unit of downside risk	1.64	2.43	-0.79
Omega ratio: Gain probability vs. loss probability	1.21	1.31	-0.11
Calmar ratio: Return relative to maximum drawdown	1.06	2.18	-1.12
Martin ratio: Return relative to average drawdown	3.46	9.19	-5.74
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MFEKX vs. MRGAX - Sharpe Ratio Comparison

The current MFEKX Sharpe Ratio is 1.16, which is lower than the MRGAX Sharpe Ratio of 1.74. The chart below compares the historical Sharpe Ratios of MFEKX and MRGAX, 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

	MFEKX	MRGAX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.16	1.74	-0.58
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.66	0.64	+0.03
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.84	0.80	+0.04
Sharpe Ratio (All Time) Calculated using the full available price history	0.87	0.55	+0.33

Drawdowns

MFEKX vs. MRGAX - Drawdown Comparison

The maximum MFEKX drawdown since its inception was -36.06%, smaller than the maximum MRGAX drawdown of -54.04%. Use the drawdown chart below to compare losses from any high point for MFEKX and MRGAX.

Drawdown Indicators

	MFEKX	MRGAX	Difference
Max Drawdown Largest peak-to-trough decline	-36.06%	-54.04%	+17.98%
Max Drawdown (1Y) Largest decline over 1 year	-17.27%	-9.53%	-7.74%
Max Drawdown (3Y) Largest decline over 3 years	-23.22%	-19.22%	-4.00%
Max Drawdown (5Y) Largest decline over 5 years	-36.06%	-23.08%	-12.98%
Max Drawdown (10Y) Largest decline over 10 years	-36.06%	-33.41%	-2.65%
Current Drawdown Current decline from peak	-0.34%	-0.17%	-0.17%
Average Drawdown Average peak-to-trough decline	-5.64%	-8.27%	+2.63%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.30%	2.25%	+3.05%

Volatility

MFEKX vs. MRGAX - Volatility Comparison

MFS Growth R6 (MFEKX) has a higher volatility of 3.59% compared to MFS Core Equity Fund (MRGAX) at 2.58%. This indicates that MFEKX's price experiences larger fluctuations and is considered to be riskier than MRGAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MFEKX	MRGAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.59%	2.58%	+1.01%
Volatility (6M) Calculated over the trailing 6-month period	12.24%	9.16%	+3.08%
Volatility (1Y) Calculated over the trailing 1-year period	15.83%	11.94%	+3.89%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.89%	16.78%	+5.11%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.20%	17.80%	+3.40%

MFEKX vs. MRGAX - Expense Ratio Comparison

MFEKX has a 0.51% expense ratio, which is lower than MRGAX's 0.93% expense ratio.

Dividends

MFEKX vs. MRGAX - Dividend Comparison

MFEKX's dividend yield for the trailing twelve months is around 13.94%, more than MRGAX's 12.57% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MFEKX MFS Growth R6	13.94%	14.82%	25.31%	4.82%	1.04%	2.74%	3.55%	1.57%	3.88%	2.49%	1.70%	3.64%
MRGAX MFS Core Equity Fund	12.57%	13.60%	8.21%	2.54%	3.83%	7.28%	1.54%	3.20%	11.09%	6.27%	3.65%	11.02%

Frequently Asked Questions

Can I hold both MFEKX and MRGAX in my portfolio?

MFEKX and MRGAX have a correlation of 0.88, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MFEKX or MRGAX?

MFEKX has higher volatility (3.59%) compared to MRGAX (2.58%). In terms of maximum drawdown, MFEKX dropped -36.06% vs MRGAX's -54.04%.

Which has better risk-adjusted returns?

MRGAX currently has the higher Sharpe Ratio (1.74 vs 1.16), 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.