MVCKX vs. ARFFX

Last updated Jun 24, 2026

MVCKX (MFS Mid Cap Value Fund Class R6) and ARFFX (Ariel Focus Fund) are both Mid Cap Value Equities funds. Over the past 10 years, MVCKX returned 10.06%/yr vs 10.63%/yr for ARFFX. Their correlation of 0.91 suggests significant overlap in exposure. MVCKX charges 0.62%/yr vs 1.00%/yr for ARFFX.

Performance

MVCKX vs. ARFFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MFS Mid Cap Value Fund Class R6 (MVCKX) and Ariel Focus Fund (ARFFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MVCKX achieves a 11.10% return, which is significantly higher than ARFFX's 8.39% return. Over the past 10 years, MVCKX has underperformed ARFFX with an annualized return of 10.06%, while ARFFX has yielded a comparatively higher 10.63% annualized return.

MVCKX

• 1D: 0.64%
• 1M: 3.18%
• YTD: 11.10%
• 6M: 9.87%
• 1Y: 19.08%
• 3Y*: 11.89%
• 5Y*: 7.62%
• 10Y*: 10.06%

ARFFX

• 1D: 0.00%
• 1M: 0.37%
• YTD: 8.39%
• 6M: 7.71%
• 1Y: 32.79%
• 3Y*: 17.24%
• 5Y*: 7.93%
• 10Y*: 10.63%

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

MVCKX vs. ARFFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MVCKX MFS Mid Cap Value Fund Class R6	11.10%	6.47%	6.80%	12.92%	-8.62%	30.93%	4.40%	31.11%	-11.35%	13.83%
ARFFX Ariel Focus Fund	8.39%	21.00%	13.39%	6.98%	-9.12%	21.14%	6.90%	25.62%	-13.23%	15.01%

Correlation

The correlation between MVCKX and ARFFX is 0.81, 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	0.81
Correlation (3Y) Calculated over the trailing 3-year period	0.89
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 Jan 2, 2014	0.91

The correlation between MVCKX and ARFFX shifts across timeframes, from 0.81 (1 year) to 0.92 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

MVCKX vs. ARFFX — Risk / Return Rank

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

MVCKX

MVCKX Risk / Return Rank: 33
MVCKX Sharpe Ratio Rank: 31
MVCKX Sortino Ratio Rank: 33
MVCKX Omega Ratio Rank: 29
MVCKX Calmar Ratio Rank: 36
MVCKX Martin Ratio Rank: 36

ARFFX

ARFFX Risk / Return Rank: 75
ARFFX Sharpe Ratio Rank: 81
ARFFX Sortino Ratio Rank: 80
ARFFX Omega Ratio Rank: 71
ARFFX Calmar Ratio Rank: 89
ARFFX Martin Ratio Rank: 55

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.

MVCKX vs. ARFFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS Mid Cap Value Fund Class R6 (MVCKX) and Ariel Focus Fund (ARFFX). 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.

	MVCKX	ARFFX	Difference
Sharpe ratio: Return per unit of total volatility	1.49	2.45	-0.95
Sortino ratio: Return per unit of downside risk	2.22	3.48	-1.26
Omega ratio: Gain probability vs. loss probability	1.26	1.43	-0.17
Calmar ratio: Return relative to maximum drawdown	2.17	4.18	-2.02
Martin ratio: Return relative to average drawdown	7.44	10.50	-3.06

MVCKX vs. ARFFX - Sharpe Ratio Comparison

The current MVCKX Sharpe Ratio is 1.49, which is lower than the ARFFX Sharpe Ratio of 2.45. The chart below compares the historical Sharpe Ratios of MVCKX and ARFFX, 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

MVCKX vs. ARFFX - Drawdown Comparison

The maximum MVCKX drawdown since its inception was -42.75%, smaller than the maximum ARFFX drawdown of -57.66%. Use the drawdown chart below to compare losses from any high point for MVCKX and ARFFX.

Drawdown Indicators

	MVCKX	ARFFX	Difference
Max Drawdown Largest peak-to-trough decline	-42.75%	-57.66%	+14.91%
Max Drawdown (1Y) Largest decline over 1 year	-9.36%	-8.02%	-1.34%
Max Drawdown (3Y) Largest decline over 3 years	-25.96%	-23.39%	-2.57%
Max Drawdown (5Y) Largest decline over 5 years	-25.96%	-24.50%	-1.46%
Max Drawdown (10Y) Largest decline over 10 years	-42.75%	-43.22%	+0.47%
Current Drawdown Current decline from peak	-0.43%	-4.31%	+3.88%
Average Drawdown Average peak-to-trough decline	-5.25%	-9.43%	+4.18%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.72%	3.19%	-0.47%

Volatility

MVCKX vs. ARFFX - Volatility Comparison

The current volatility for MFS Mid Cap Value Fund Class R6 (MVCKX) is 3.75%, while Ariel Focus Fund (ARFFX) has a volatility of 3.98%. This indicates that MVCKX experiences smaller price fluctuations and is considered to be less risky than ARFFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MVCKX	ARFFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.75%	3.98%	-0.23%
Volatility (6M) Calculated over the trailing 6-month period	9.90%	9.58%	+0.32%
Volatility (1Y) Calculated over the trailing 1-year period	13.62%	13.74%	-0.12%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.53%	18.51%	-0.98%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.42%	19.88%	-0.46%

MVCKX vs. ARFFX - Expense Ratio Comparison

MVCKX has a 0.62% expense ratio, which is lower than ARFFX's 1.00% expense ratio.

Dividends

MVCKX vs. ARFFX - Dividend Comparison

MVCKX's dividend yield for the trailing twelve months is around 7.44%, less than ARFFX's 11.70% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ARFFX Ariel Focus Fund	11.70%	12.68%	2.27%	3.33%	8.30%	3.30%	2.41%	1.03%	7.61%	5.76%	1.04%	13.91%
MVCKX MFS Mid Cap Value Fund Class R6	7.44%	8.27%	3.87%	3.00%	5.44%	5.88%	1.12%	2.32%	6.65%	3.68%	0.06%	4.87%

Frequently Asked Questions

Can I hold both MVCKX and ARFFX in my portfolio?

MVCKX and ARFFX have a correlation of 0.81, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MVCKX or ARFFX?

ARFFX has higher volatility (3.98%) compared to MVCKX (3.75%). In terms of maximum drawdown, MVCKX dropped -42.75% vs ARFFX's -57.66%.

Which has better risk-adjusted returns?

ARFFX currently has the higher Sharpe Ratio (2.45 vs 1.49), 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.