COSZX vs. MFWTX

Last updated Jun 24, 2026

COSZX (Columbia Overseas Value Fund) and MFWTX (MFS Global Total Return Fund) are both mutual funds - COSZX is a Foreign Large Cap Equities fund managed by Columbia, while MFWTX is a Global Allocation fund managed by MFS. Over the past 10 years, COSZX returned 10.52%/yr vs 6.44%/yr for MFWTX. Their correlation of 0.88 suggests significant overlap in exposure. COSZX charges 0.90%/yr vs 1.09%/yr for MFWTX.

Performance

COSZX vs. MFWTX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Columbia Overseas Value Fund (COSZX) and MFS Global Total Return Fund (MFWTX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, COSZX achieves a 1.13% return, which is significantly lower than MFWTX's 4.62% return. Over the past 10 years, COSZX has outperformed MFWTX with an annualized return of 10.52%, while MFWTX has yielded a comparatively lower 6.44% annualized return.

COSZX

• 1D: -4.71%
• 1M: -5.96%
• YTD: 1.13%
• 6M: 0.35%
• 1Y: 19.68%
• 3Y*: 19.32%
• 5Y*: 10.91%
• 10Y*: 10.52%

MFWTX

• 1D: -0.11%
• 1M: -0.06%
• YTD: 4.62%
• 6M: 4.44%
• 1Y: 12.65%
• 3Y*: 10.35%
• 5Y*: 4.89%
• 10Y*: 6.44%

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

COSZX vs. MFWTX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
COSZX Columbia Overseas Value Fund	1.13%	45.80%	4.70%	16.05%	-5.99%	10.78%	-0.07%	22.37%	-16.70%	27.82%
MFWTX MFS Global Total Return Fund	4.62%	15.48%	3.92%	10.29%	-10.86%	8.31%	9.35%	18.25%	-7.19%	14.77%

Correlation

The correlation between COSZX and MFWTX is 0.86, 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	0.86
Correlation (3Y) Calculated over the trailing 3-year period	0.84
Correlation (5Y) Calculated over the trailing 5-year period	0.86
Correlation (10Y) Calculated over the trailing 10-year period	0.85
Correlation (All Time) Calculated using the full available price history since Apr 1, 2008	0.88

The correlation between COSZX and MFWTX has been stable across timeframes, ranging from 0.84 to 0.88 - a consistent structural relationship.

Return for Risk

COSZX vs. MFWTX — Risk / Return Rank

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

COSZX

COSZX Risk / Return Rank: 26
COSZX Sharpe Ratio Rank: 27
COSZX Sortino Ratio Rank: 24
COSZX Omega Ratio Rank: 29
COSZX Calmar Ratio Rank: 25
COSZX Martin Ratio Rank: 26

MFWTX

MFWTX Risk / Return Rank: 38
MFWTX Sharpe Ratio Rank: 41
MFWTX Sortino Ratio Rank: 43
MFWTX Omega Ratio Rank: 41
MFWTX Calmar Ratio Rank: 31
MFWTX Martin Ratio Rank: 33

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.

COSZX vs. MFWTX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Columbia Overseas Value Fund (COSZX) and MFS Global Total Return Fund (MFWTX). 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.

	COSZX	MFWTX	Difference
Sharpe ratio: Return per unit of total volatility	1.38	1.75	-0.36
Sortino ratio: Return per unit of downside risk	1.89	2.55	-0.66
Omega ratio: Gain probability vs. loss probability	1.26	1.32	-0.06
Calmar ratio: Return relative to maximum drawdown	1.74	1.97	-0.22
Martin ratio: Return relative to average drawdown	5.64	6.93	-1.29

COSZX vs. MFWTX - Sharpe Ratio Comparison

The current COSZX Sharpe Ratio is 1.38, which is comparable to the MFWTX Sharpe Ratio of 1.75. The chart below compares the historical Sharpe Ratios of COSZX and MFWTX, 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

COSZX vs. MFWTX - Drawdown Comparison

The maximum COSZX drawdown since its inception was -63.37%, which is greater than MFWTX's maximum drawdown of -33.22%. Use the drawdown chart below to compare losses from any high point for COSZX and MFWTX.

Drawdown Indicators

	COSZX	MFWTX	Difference
Max Drawdown Largest peak-to-trough decline	-63.37%	-33.22%	-30.15%
Max Drawdown (1Y) Largest decline over 1 year	-11.76%	-6.72%	-5.04%
Max Drawdown (3Y) Largest decline over 3 years	-13.34%	-8.68%	-4.66%
Max Drawdown (5Y) Largest decline over 5 years	-25.77%	-20.36%	-5.41%
Max Drawdown (10Y) Largest decline over 10 years	-43.40%	-23.37%	-20.03%
Current Drawdown Current decline from peak	-10.14%	-1.73%	-8.41%
Average Drawdown Average peak-to-trough decline	-17.86%	-3.55%	-14.31%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.63%	1.90%	+1.73%

Volatility

COSZX vs. MFWTX - Volatility Comparison

Columbia Overseas Value Fund (COSZX) has a higher volatility of 6.22% compared to MFS Global Total Return Fund (MFWTX) at 2.21%. This indicates that COSZX's price experiences larger fluctuations and is considered to be riskier than MFWTX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	COSZX	MFWTX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.22%	2.21%	+4.01%
Volatility (6M) Calculated over the trailing 6-month period	12.38%	5.90%	+6.48%
Volatility (1Y) Calculated over the trailing 1-year period	14.85%	7.58%	+7.27%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.01%	9.14%	+6.87%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.46%	9.63%	+7.83%

COSZX vs. MFWTX - Expense Ratio Comparison

COSZX has a 0.90% expense ratio, which is lower than MFWTX's 1.09% expense ratio.

Dividends

COSZX vs. MFWTX - Dividend Comparison

COSZX's dividend yield for the trailing twelve months is around 7.82%, less than MFWTX's 8.04% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
COSZX Columbia Overseas Value Fund	7.82%	7.91%	5.38%	3.97%	1.88%	3.59%	1.69%	3.82%	3.59%	1.71%	1.99%	2.27%
MFWTX MFS Global Total Return Fund	8.04%	8.42%	8.94%	3.69%	2.64%	10.29%	7.20%	4.41%	3.33%	2.17%	1.13%	4.29%

Frequently Asked Questions

Can I hold both COSZX and MFWTX in my portfolio?

COSZX and MFWTX have a correlation of 0.86, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, COSZX or MFWTX?

COSZX has higher volatility (6.22%) compared to MFWTX (2.21%). In terms of maximum drawdown, COSZX dropped -63.37% vs MFWTX's -33.22%.

Which has better risk-adjusted returns?

MFWTX currently has the higher Sharpe Ratio (1.75 vs 1.38), 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.