ACWV vs. MWEBX

Last updated Jun 4, 2026

ACWV (iShares MSCI Global Min Vol Factor ETF) and MWEBX (MFS Global Equity Fund) are both funds - ACWV is a Large Cap Blend Equities fund tracking the MSCI AC World Minimum Volatility (USD), while MWEBX is a Global Equities fund managed by MFS. Over the past 10 years, ACWV returned 7.36%/yr vs 9.26%/yr for MWEBX. Their correlation of 0.82 suggests significant overlap in exposure. ACWV charges 0.20%/yr vs 1.90%/yr for MWEBX.

Performance

ACWV vs. MWEBX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares MSCI Global Min Vol Factor ETF (ACWV) and MFS Global Equity Fund (MWEBX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ACWV achieves a 2.36% return, which is significantly higher than MWEBX's 0.38% return. Over the past 10 years, ACWV has underperformed MWEBX with an annualized return of 7.36%, while MWEBX has yielded a comparatively higher 9.26% annualized return.

ACWV

• 1D: -0.62%
• 1M: 1.01%
• YTD: 2.36%
• 6M: 2.56%
• 1Y: 4.79%
• 3Y*: 10.06%
• 5Y*: 5.47%
• 10Y*: 7.36%

MWEBX

• 1D: -0.41%
• 1M: 3.34%
• YTD: 0.38%
• 6M: 2.26%
• 1Y: 7.27%
• 3Y*: 13.53%
• 5Y*: 5.91%
• 10Y*: 9.26%

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

ACWV vs. MWEBX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ACWV iShares MSCI Global Min Vol Factor ETF	2.36%	11.04%	11.38%	8.23%	-10.36%	13.97%	3.04%	21.04%	-1.42%	18.57%
MWEBX MFS Global Equity Fund	0.38%	12.70%	22.16%	13.48%	-18.53%	16.15%	13.03%	29.23%	-10.51%	22.63%

Correlation

The correlation between ACWV and MWEBX is 0.69, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.69
Correlation (3Y) Calculated over the trailing 3-year period	0.73
Correlation (5Y) Calculated over the trailing 5-year period	0.80
Correlation (10Y) Calculated over the trailing 10-year period	0.82
Correlation (All Time) Calculated using the full available price history since Oct 21, 2011	0.82

The correlation between ACWV and MWEBX shifts across timeframes, from 0.69 (1 year) to 0.82 (10 years), reflecting how their relationship changes across market environments.

Return for Risk

ACWV vs. MWEBX — Risk / Return Rank

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

ACWV

ACWV Risk / Return Rank: 18
ACWV Sharpe Ratio Rank: 19
ACWV Sortino Ratio Rank: 17
ACWV Omega Ratio Rank: 17
ACWV Calmar Ratio Rank: 18
ACWV Martin Ratio Rank: 20

MWEBX

MWEBX Risk / Return Rank: 7
MWEBX Sharpe Ratio Rank: 7
MWEBX Sortino Ratio Rank: 7
MWEBX Omega Ratio Rank: 7
MWEBX Calmar Ratio Rank: 6
MWEBX Martin Ratio Rank: 7

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.

ACWV vs. MWEBX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares MSCI Global Min Vol Factor ETF (ACWV) and MFS Global Equity Fund (MWEBX). 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.

	ACWV	MWEBX	Difference
Sharpe ratio: Return per unit of total volatility	0.62	0.59	+0.03
Sortino ratio: Return per unit of downside risk	0.92	0.93	-0.01
Omega ratio: Gain probability vs. loss probability	1.11	1.11	0.00
Calmar ratio: Return relative to maximum drawdown	0.76	0.55	+0.20
Martin ratio: Return relative to average drawdown	2.37	1.92	+0.44
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

ACWV vs. MWEBX - Sharpe Ratio Comparison

The current ACWV Sharpe Ratio is 0.62, which is comparable to the MWEBX Sharpe Ratio of 0.59. The chart below compares the historical Sharpe Ratios of ACWV and MWEBX, 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

	ACWV	MWEBX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.62	0.59	+0.03
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.54	0.35	+0.19
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.60	0.54	+0.06
Sharpe Ratio (All Time) Calculated using the full available price history	0.71	0.53	+0.18

Drawdowns

ACWV vs. MWEBX - Drawdown Comparison

The maximum ACWV drawdown since its inception was -28.82%, smaller than the maximum MWEBX drawdown of -52.31%. Use the drawdown chart below to compare losses from any high point for ACWV and MWEBX.

Drawdown Indicators

	ACWV	MWEBX	Difference
Max Drawdown Largest peak-to-trough decline	-28.82%	-52.31%	+23.49%
Max Drawdown (1Y) Largest decline over 1 year	-6.37%	-13.43%	+7.06%
Max Drawdown (3Y) Largest decline over 3 years	-7.56%	-15.10%	+7.54%
Max Drawdown (5Y) Largest decline over 5 years	-18.14%	-28.70%	+10.56%
Max Drawdown (10Y) Largest decline over 10 years	-28.82%	-33.91%	+5.09%
Current Drawdown Current decline from peak	-2.92%	-2.33%	-0.59%
Average Drawdown Average peak-to-trough decline	-3.11%	-7.89%	+4.78%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.03%	3.84%	-1.81%

Volatility

ACWV vs. MWEBX - Volatility Comparison

The current volatility for iShares MSCI Global Min Vol Factor ETF (ACWV) is 1.79%, while MFS Global Equity Fund (MWEBX) has a volatility of 3.62%. This indicates that ACWV experiences smaller price fluctuations and is considered to be less risky than MWEBX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ACWV	MWEBX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.79%	3.62%	-1.83%
Volatility (6M) Calculated over the trailing 6-month period	5.54%	9.60%	-4.06%
Volatility (1Y) Calculated over the trailing 1-year period	7.71%	12.51%	-4.80%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	10.23%	17.04%	-6.81%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	12.30%	17.17%	-4.87%

ACWV vs. MWEBX - Expense Ratio Comparison

ACWV has a 0.20% expense ratio, which is lower than MWEBX's 1.90% expense ratio.

Dividends

ACWV vs. MWEBX - Dividend Comparison

ACWV's dividend yield for the trailing twelve months is around 2.04%, less than MWEBX's 24.04% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ACWV iShares MSCI Global Min Vol Factor ETF	2.04%	2.09%	2.33%	2.41%	2.18%	1.92%	1.77%	2.54%	2.32%	2.04%	2.56%	2.28%
MWEBX MFS Global Equity Fund	24.04%	24.13%	28.50%	8.83%	9.68%	5.33%	2.09%	1.46%	5.42%	2.16%	0.85%	1.19%

Frequently Asked Questions

Can I hold both ACWV and MWEBX in my portfolio?

ACWV and MWEBX have a correlation of 0.69, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, ACWV or MWEBX?

MWEBX has higher volatility (3.62%) compared to ACWV (1.79%). In terms of maximum drawdown, ACWV dropped -28.82% vs MWEBX's -52.31%.

Which has better risk-adjusted returns?

ACWV currently has the higher Sharpe Ratio (0.62 vs 0.59), 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.