MFWIX vs. OWLSX

Last updated Jun 23, 2026

MFWIX (MFS Global Total Return Fund Class I) and OWLSX (Old Westbury Large Cap Strategies Fund) are both Global Equities funds. Over the past 10 years, MFWIX returned 6.49%/yr vs 10.65%/yr for OWLSX. Their correlation of 0.80 suggests significant overlap in exposure. MFWIX charges 0.84%/yr vs 1.09%/yr for OWLSX.

Performance

MFWIX vs. OWLSX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MFS Global Total Return Fund Class I (MFWIX) and Old Westbury Large Cap Strategies Fund (OWLSX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MFWIX achieves a 4.69% return, which is significantly lower than OWLSX's 8.37% return. Over the past 10 years, MFWIX has underperformed OWLSX with an annualized return of 6.49%, while OWLSX has yielded a comparatively higher 10.65% annualized return.

MFWIX

• 1D: -0.34%
• 1M: 0.06%
• YTD: 4.69%
• 6M: 4.82%
• 1Y: 13.43%
• 3Y*: 10.06%
• 5Y*: 5.27%
• 10Y*: 6.49%

OWLSX

• 1D: 1.17%
• 1M: 0.81%
• YTD: 8.37%
• 6M: 8.47%
• 1Y: 22.63%
• 3Y*: 17.87%
• 5Y*: 9.12%
• 10Y*: 10.65%

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

MFWIX vs. OWLSX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MFWIX MFS Global Total Return Fund Class I	4.69%	15.70%	4.25%	10.52%	-10.62%	8.59%	9.63%	18.49%	-6.96%	15.00%
OWLSX Old Westbury Large Cap Strategies Fund	8.37%	17.61%	20.86%	19.74%	-22.15%	17.26%	15.36%	25.19%	-8.59%	19.40%

Correlation

The correlation between MFWIX and OWLSX is 0.70, 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	0.70
Correlation (3Y) Calculated over the trailing 3-year period	0.71
Correlation (5Y) Calculated over the trailing 5-year period	0.79
Correlation (10Y) Calculated over the trailing 10-year period	0.82
Correlation (All Time) Calculated using the full available price history since Dec 31, 1996	0.80

The correlation between MFWIX and OWLSX shifts across timeframes, from 0.70 (1 year) to 0.82 (10 years), reflecting how their relationship changes across market environments.

Return for Risk

MFWIX vs. OWLSX — Risk / Return Rank

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

MFWIX

MFWIX Risk / Return Rank: 39
MFWIX Sharpe Ratio Rank: 42
MFWIX Sortino Ratio Rank: 44
MFWIX Omega Ratio Rank: 42
MFWIX Calmar Ratio Rank: 31
MFWIX Martin Ratio Rank: 33

OWLSX

OWLSX Risk / Return Rank: 29
OWLSX Sharpe Ratio Rank: 3
OWLSX Sortino Ratio Rank: 36
OWLSX Omega Ratio Rank: 98
OWLSX Calmar Ratio Rank: 5
OWLSX Martin Ratio Rank: 4

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.

MFWIX vs. OWLSX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS Global Total Return Fund Class I (MFWIX) and Old Westbury Large Cap Strategies Fund (OWLSX). 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.

	MFWIX	OWLSX	Difference
Sharpe ratio: Return per unit of total volatility	1.77	0.10	+1.66
Sortino ratio: Return per unit of downside risk	2.58	2.33	+0.25
Omega ratio: Gain probability vs. loss probability	1.33	2.23	-0.91
Calmar ratio: Return relative to maximum drawdown	1.99	0.33	+1.66
Martin ratio: Return relative to average drawdown	7.00	0.39	+6.61

MFWIX vs. OWLSX - Sharpe Ratio Comparison

The current MFWIX Sharpe Ratio is 1.77, which is higher than the OWLSX Sharpe Ratio of 0.10. The chart below compares the historical Sharpe Ratios of MFWIX and OWLSX, 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

MFWIX vs. OWLSX - Drawdown Comparison

The maximum MFWIX drawdown since its inception was -33.01%, smaller than the maximum OWLSX drawdown of -68.17%. Use the drawdown chart below to compare losses from any high point for MFWIX and OWLSX.

Drawdown Indicators

	MFWIX	OWLSX	Difference
Max Drawdown Largest peak-to-trough decline	-33.01%	-68.17%	+35.16%
Max Drawdown (1Y) Largest decline over 1 year	-6.73%	-68.17%	+61.44%
Max Drawdown (3Y) Largest decline over 3 years	-8.63%	-68.17%	+59.54%
Max Drawdown (5Y) Largest decline over 5 years	-20.22%	-68.17%	+47.95%
Max Drawdown (10Y) Largest decline over 10 years	-23.36%	-68.17%	+44.81%
Current Drawdown Current decline from peak	-1.65%	-63.12%	+61.47%
Average Drawdown Average peak-to-trough decline	-3.81%	-19.64%	+15.83%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.90%	57.11%	-55.21%

Volatility

MFWIX vs. OWLSX - Volatility Comparison

The current volatility for MFS Global Total Return Fund Class I (MFWIX) is 2.29%, while Old Westbury Large Cap Strategies Fund (OWLSX) has a volatility of 4.93%. This indicates that MFWIX experiences smaller price fluctuations and is considered to be less risky than OWLSX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MFWIX	OWLSX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.29%	4.93%	-2.64%
Volatility (6M) Calculated over the trailing 6-month period	5.89%	10.10%	-4.21%
Volatility (1Y) Calculated over the trailing 1-year period	7.55%	214.15%	-206.60%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	9.16%	96.93%	-87.77%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	9.64%	69.49%	-59.85%

MFWIX vs. OWLSX - Expense Ratio Comparison

MFWIX has a 0.84% expense ratio, which is lower than OWLSX's 1.09% expense ratio.

Dividends

MFWIX vs. OWLSX - Dividend Comparison

MFWIX's dividend yield for the trailing twelve months is around 8.37%, less than OWLSX's 11.54% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MFWIX MFS Global Total Return Fund Class I	8.37%	8.77%	9.36%	3.98%	2.94%	10.71%	7.53%	4.70%	3.64%	2.36%	1.40%	4.59%
OWLSX Old Westbury Large Cap Strategies Fund	11.54%	12.51%	5.79%	0.55%	0.61%	6.60%	1.38%	4.94%	4.65%	5.86%	1.81%	2.40%

Frequently Asked Questions

Can I hold both MFWIX and OWLSX in my portfolio?

MFWIX and OWLSX have a correlation of 0.70, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MFWIX or OWLSX?

OWLSX has higher volatility (4.93%) compared to MFWIX (2.29%). In terms of maximum drawdown, MFWIX dropped -33.01% vs OWLSX's -68.17%.

Which has better risk-adjusted returns?

MFWIX currently has the higher Sharpe Ratio (1.77 vs 0.10), 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.