OBEGX vs. MFWIX

Last updated Jun 24, 2026

OBEGX (Oberweis Global Opportunities Fund) and MFWIX (MFS Global Total Return Fund Class I) are both Global Equities funds. Over the past 10 years, OBEGX returned 12.77%/yr vs 6.69%/yr for MFWIX. A 0.62 correlation means they provide meaningful diversification when combined. OBEGX charges 1.51%/yr vs 0.84%/yr for MFWIX.

Performance

OBEGX vs. MFWIX - Performance Comparison

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

Returns By Period

In the year-to-date period, OBEGX achieves a 31.52% return, which is significantly higher than MFWIX's 4.64% return. Over the past 10 years, OBEGX has outperformed MFWIX with an annualized return of 12.77%, while MFWIX has yielded a comparatively lower 6.69% annualized return.

OBEGX

• 1D: 1.40%
• 1M: 3.92%
• YTD: 31.52%
• 6M: 29.43%
• 1Y: 48.99%
• 3Y*: 20.64%
• 5Y*: 6.55%
• 10Y*: 12.77%

MFWIX

• 1D: -0.06%
• 1M: 0.00%
• YTD: 4.64%
• 6M: 4.51%
• 1Y: 12.84%
• 3Y*: 10.59%
• 5Y*: 5.12%
• 10Y*: 6.69%

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

OBEGX vs. MFWIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OBEGX Oberweis Global Opportunities Fund	31.52%	19.32%	10.72%	6.40%	-26.76%	20.80%	55.68%	25.67%	-25.62%	33.35%
MFWIX MFS Global Total Return Fund Class I	4.64%	15.70%	4.25%	10.52%	-10.62%	8.59%	9.63%	18.49%	-6.96%	15.00%

Correlation

The correlation between OBEGX and MFWIX is 0.50, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.50
Correlation (3Y) Calculated over the trailing 3-year period	0.61
Correlation (5Y) Calculated over the trailing 5-year period	0.69
Correlation (10Y) Calculated over the trailing 10-year period	0.68
Correlation (All Time) Calculated using the full available price history since Dec 31, 1996	0.62

The correlation between OBEGX and MFWIX shifts across timeframes, from 0.50 (1 year) to 0.69 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

OBEGX vs. MFWIX — Risk / Return Rank

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

OBEGX

OBEGX Risk / Return Rank: 79
OBEGX Sharpe Ratio Rank: 79
OBEGX Sortino Ratio Rank: 69
OBEGX Omega Ratio Rank: 64
OBEGX Calmar Ratio Rank: 91
OBEGX Martin Ratio Rank: 89

MFWIX

MFWIX Risk / Return Rank: 39
MFWIX Sharpe Ratio Rank: 43
MFWIX Sortino Ratio Rank: 45
MFWIX Omega Ratio Rank: 43
MFWIX Calmar Ratio Rank: 32
MFWIX 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.

OBEGX vs. MFWIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Oberweis Global Opportunities Fund (OBEGX) and MFS Global Total Return Fund Class I (MFWIX). 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.

	OBEGX	MFWIX	Difference
Sharpe ratio: Return per unit of total volatility	2.40	1.78	+0.62
Sortino ratio: Return per unit of downside risk	3.16	2.59	+0.57
Omega ratio: Gain probability vs. loss probability	1.40	1.33	+0.08
Calmar ratio: Return relative to maximum drawdown	4.54	2.00	+2.55
Martin ratio: Return relative to average drawdown	16.25	7.03	+9.23

OBEGX vs. MFWIX - Sharpe Ratio Comparison

The current OBEGX Sharpe Ratio is 2.40, which is higher than the MFWIX Sharpe Ratio of 1.78. The chart below compares the historical Sharpe Ratios of OBEGX and MFWIX, 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

OBEGX vs. MFWIX - Drawdown Comparison

The maximum OBEGX drawdown since its inception was -83.07%, which is greater than MFWIX's maximum drawdown of -33.01%. Use the drawdown chart below to compare losses from any high point for OBEGX and MFWIX.

Drawdown Indicators

	OBEGX	MFWIX	Difference
Max Drawdown Largest peak-to-trough decline	-83.07%	-33.01%	-50.06%
Max Drawdown (1Y) Largest decline over 1 year	-11.24%	-6.73%	-4.51%
Max Drawdown (3Y) Largest decline over 3 years	-25.41%	-8.63%	-16.78%
Max Drawdown (5Y) Largest decline over 5 years	-39.68%	-20.22%	-19.46%
Max Drawdown (10Y) Largest decline over 10 years	-41.54%	-23.36%	-18.18%
Current Drawdown Current decline from peak	0.00%	-1.71%	+1.71%
Average Drawdown Average peak-to-trough decline	-33.67%	-3.81%	-29.86%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.14%	1.91%	+1.23%

Volatility

OBEGX vs. MFWIX - Volatility Comparison

Oberweis Global Opportunities Fund (OBEGX) has a higher volatility of 7.45% compared to MFS Global Total Return Fund Class I (MFWIX) at 2.24%. This indicates that OBEGX's price experiences larger fluctuations and is considered to be riskier than MFWIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OBEGX	MFWIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.45%	2.24%	+5.21%
Volatility (6M) Calculated over the trailing 6-month period	17.03%	5.89%	+11.14%
Volatility (1Y) Calculated over the trailing 1-year period	21.31%	7.57%	+13.74%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	23.35%	9.16%	+14.19%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.70%	9.64%	+13.06%

OBEGX vs. MFWIX - Expense Ratio Comparison

OBEGX has a 1.51% expense ratio, which is higher than MFWIX's 0.84% expense ratio.

Dividends

OBEGX vs. MFWIX - Dividend Comparison

OBEGX's dividend yield for the trailing twelve months is around 9.62%, more than MFWIX's 8.38% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MFWIX MFS Global Total Return Fund Class I	8.38%	8.77%	9.36%	3.98%	2.94%	10.71%	7.53%	4.70%	3.64%	2.36%	1.40%	4.59%
OBEGX Oberweis Global Opportunities Fund	9.62%	12.66%	0.00%	0.00%	2.64%	25.09%	5.80%	0.00%	6.68%	13.37%	1.12%	14.32%

Frequently Asked Questions

Can I hold both OBEGX and MFWIX in my portfolio?

OBEGX and MFWIX have a correlation of 0.50, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, OBEGX or MFWIX?

OBEGX has higher volatility (7.45%) compared to MFWIX (2.24%). In terms of maximum drawdown, OBEGX dropped -83.07% vs MFWIX's -33.01%.

Which has better risk-adjusted returns?

OBEGX currently has the higher Sharpe Ratio (2.40 vs 1.78), 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.