MWOFX vs. MIEIX

Last updated Jun 25, 2026

MWOFX (MFS Global Growth Fund) and MIEIX (MFS International Equity Fund Class R6) are both mutual funds - MWOFX is a Global Equities fund managed by MFS, while MIEIX is a Foreign Large Cap Equities fund managed by MFS. Over the past 10 years, MWOFX returned 10.44%/yr vs 10.37%/yr for MIEIX. Their correlation of 0.84 suggests significant overlap in exposure. MWOFX charges 1.22%/yr vs 0.68%/yr for MIEIX.

Performance

MWOFX vs. MIEIX - Performance Comparison

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

Returns By Period

In the year-to-date period, MWOFX achieves a -5.85% return, which is significantly lower than MIEIX's 2.02% return. Both investments have delivered pretty close results over the past 10 years, with MWOFX having a 10.44% annualized return and MIEIX not far behind at 10.37%.

MWOFX

• 1D: -1.29%
• 1M: -2.16%
• YTD: -5.85%
• 6M: -6.63%
• 1Y: -1.61%
• 3Y*: 6.17%
• 5Y*: 3.06%
• 10Y*: 10.44%

MIEIX

• 1D: -1.03%
• 1M: -0.55%
• YTD: 2.02%
• 6M: 1.69%
• 1Y: 9.15%
• 3Y*: 11.68%
• 5Y*: 6.92%
• 10Y*: 10.37%

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

MWOFX vs. MIEIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MWOFX MFS Global Growth Fund	-5.85%	7.17%	10.68%	20.63%	-19.28%	18.33%	20.23%	35.37%	-4.94%	31.13%
MIEIX MFS International Equity Fund Class R6	2.02%	23.22%	4.13%	19.06%	-14.82%	15.13%	11.11%	28.42%	-10.66%	28.01%

Correlation

The correlation between MWOFX and MIEIX is 0.82, 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	0.82
Correlation (3Y) Calculated over the trailing 3-year period	0.79
Correlation (5Y) Calculated over the trailing 5-year period	0.82
Correlation (10Y) Calculated over the trailing 10-year period	0.83
Correlation (All Time) Calculated using the full available price history since Jan 30, 1996	0.84

The correlation between MWOFX and MIEIX has been stable across timeframes, ranging from 0.79 to 0.84 - a consistent structural relationship.

Return for Risk

MWOFX vs. MIEIX — Risk / Return Rank

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

MWOFX

MWOFX Risk / Return Rank: 3
MWOFX Sharpe Ratio Rank: 3
MWOFX Sortino Ratio Rank: 3
MWOFX Omega Ratio Rank: 3
MWOFX Calmar Ratio Rank: 3
MWOFX Martin Ratio Rank: 3

MIEIX

MIEIX Risk / Return Rank: 11
MIEIX Sharpe Ratio Rank: 10
MIEIX Sortino Ratio Rank: 11
MIEIX Omega Ratio Rank: 11
MIEIX Calmar Ratio Rank: 11
MIEIX Martin Ratio Rank: 13

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.

MWOFX vs. MIEIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS Global Growth Fund (MWOFX) and MFS International Equity Fund Class R6 (MIEIX). 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.

	MWOFX	MIEIX	Difference
Sharpe ratio: Return per unit of total volatility	-0.03	0.79	-0.82
Sortino ratio: Return per unit of downside risk	0.05	1.19	-1.15
Omega ratio: Gain probability vs. loss probability	1.01	1.15	-0.14
Calmar ratio: Return relative to maximum drawdown	-0.03	0.94	-0.96
Martin ratio: Return relative to average drawdown	-0.07	3.27	-3.34

MWOFX vs. MIEIX - Sharpe Ratio Comparison

The current MWOFX Sharpe Ratio is -0.03, which is lower than the MIEIX Sharpe Ratio of 0.79. The chart below compares the historical Sharpe Ratios of MWOFX and MIEIX, 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

MWOFX vs. MIEIX - Drawdown Comparison

The maximum MWOFX drawdown since its inception was -56.10%, which is greater than MIEIX's maximum drawdown of -53.13%. Use the drawdown chart below to compare losses from any high point for MWOFX and MIEIX.

Drawdown Indicators

	MWOFX	MIEIX	Difference
Max Drawdown Largest peak-to-trough decline	-56.10%	-53.13%	-2.97%
Max Drawdown (1Y) Largest decline over 1 year	-13.82%	-11.26%	-2.56%
Max Drawdown (3Y) Largest decline over 3 years	-16.45%	-13.43%	-3.02%
Max Drawdown (5Y) Largest decline over 5 years	-27.64%	-28.07%	+0.43%
Max Drawdown (10Y) Largest decline over 10 years	-31.68%	-31.35%	-0.33%
Current Drawdown Current decline from peak	-8.11%	-2.66%	-5.45%
Average Drawdown Average peak-to-trough decline	-11.90%	-8.96%	-2.94%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.65%	3.22%	+1.43%

Volatility

MWOFX vs. MIEIX - Volatility Comparison

MFS Global Growth Fund (MWOFX) has a higher volatility of 4.33% compared to MFS International Equity Fund Class R6 (MIEIX) at 3.74%. This indicates that MWOFX's price experiences larger fluctuations and is considered to be riskier than MIEIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MWOFX	MIEIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.33%	3.74%	+0.59%
Volatility (6M) Calculated over the trailing 6-month period	10.07%	10.63%	-0.56%
Volatility (1Y) Calculated over the trailing 1-year period	12.48%	13.33%	-0.85%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.88%	15.39%	+0.49%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.57%	15.72%	+0.85%

MWOFX vs. MIEIX - Expense Ratio Comparison

MWOFX has a 1.22% expense ratio, which is higher than MIEIX's 0.68% expense ratio.

Dividends

MWOFX vs. MIEIX - Dividend Comparison

MWOFX's dividend yield for the trailing twelve months is around 5.76%, more than MIEIX's 2.62% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MIEIX MFS International Equity Fund Class R6	2.62%	2.68%	1.47%	1.67%	1.26%	5.40%	1.00%	3.12%	1.63%	1.85%	1.78%	1.71%
MWOFX MFS Global Growth Fund	5.76%	5.42%	5.14%	2.09%	3.60%	6.25%	3.13%	1.86%	5.00%	3.43%	1.68%	6.08%

Frequently Asked Questions

Can I hold both MWOFX and MIEIX in my portfolio?

MWOFX and MIEIX have a correlation of 0.82, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MWOFX or MIEIX?

MWOFX has higher volatility (4.33%) compared to MIEIX (3.74%). In terms of maximum drawdown, MWOFX dropped -56.10% vs MIEIX's -53.13%.

Which has better risk-adjusted returns?

MIEIX currently has the higher Sharpe Ratio (0.79 vs -0.03), 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.