ALTFX vs. OBEGX

Last updated Jun 4, 2026

ALTFX (AB Sustainable Global Thematic Fund) and OBEGX (Oberweis Global Opportunities Fund) are both Global Equities funds. Over the past 10 years, ALTFX returned 11.46%/yr vs 12.03%/yr for OBEGX. Their correlation of 0.82 suggests significant overlap in exposure. ALTFX charges 1.02%/yr vs 1.51%/yr for OBEGX.

Performance

ALTFX vs. OBEGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in AB Sustainable Global Thematic Fund (ALTFX) and Oberweis Global Opportunities Fund (OBEGX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ALTFX achieves a 5.73% return, which is significantly lower than OBEGX's 28.94% return. Both investments have delivered pretty close results over the past 10 years, with ALTFX having a 11.46% annualized return and OBEGX not far ahead at 12.03%.

ALTFX

• 1D: 0.54%
• 1M: 5.67%
• YTD: 5.73%
• 6M: 4.98%
• 1Y: 9.72%
• 3Y*: 8.78%
• 5Y*: 2.92%
• 10Y*: 11.46%

OBEGX

• 1D: 1.71%
• 1M: 7.16%
• YTD: 28.94%
• 6M: 27.03%
• 1Y: 48.45%
• 3Y*: 20.12%
• 5Y*: 6.92%
• 10Y*: 12.03%

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

ALTFX vs. OBEGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ALTFX AB Sustainable Global Thematic Fund	5.73%	6.22%	5.94%	15.97%	-27.19%	22.64%	39.40%	33.60%	-9.86%	37.16%
OBEGX Oberweis Global Opportunities Fund	28.94%	19.32%	10.72%	6.40%	-26.76%	20.80%	55.68%	25.67%	-25.62%	33.35%

Correlation

The correlation between ALTFX and OBEGX is 0.79, 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	0.79
Correlation (3Y) Calculated over the trailing 3-year period	0.81
Correlation (5Y) Calculated over the trailing 5-year period	0.85
Correlation (10Y) Calculated over the trailing 10-year period	0.85
Correlation (All Time) Calculated using the full available price history since Jan 17, 1996	0.82

The correlation between ALTFX and OBEGX has been stable across timeframes, ranging from 0.79 to 0.85 - a consistent structural relationship.

Return for Risk

ALTFX vs. OBEGX — Risk / Return Rank

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

ALTFX

ALTFX Risk / Return Rank: 8
ALTFX Sharpe Ratio Rank: 9
ALTFX Sortino Ratio Rank: 9
ALTFX Omega Ratio Rank: 9
ALTFX Calmar Ratio Rank: 6
ALTFX Martin Ratio Rank: 7

OBEGX

OBEGX Risk / Return Rank: 73
OBEGX Sharpe Ratio Rank: 72
OBEGX Sortino Ratio Rank: 60
OBEGX Omega Ratio Rank: 56
OBEGX Calmar Ratio Rank: 89
OBEGX Martin Ratio Rank: 85

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.

ALTFX vs. OBEGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for AB Sustainable Global Thematic Fund (ALTFX) and Oberweis Global Opportunities Fund (OBEGX). 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.

	ALTFX	OBEGX	Difference
Sharpe ratio: Return per unit of total volatility	0.71	2.48	-1.77
Sortino ratio: Return per unit of downside risk	1.08	3.27	-2.20
Omega ratio: Gain probability vs. loss probability	1.14	1.42	-0.28
Calmar ratio: Return relative to maximum drawdown	0.65	4.50	-3.85
Martin ratio: Return relative to average drawdown	1.94	16.29	-14.35
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

ALTFX vs. OBEGX - Sharpe Ratio Comparison

The current ALTFX Sharpe Ratio is 0.71, which is lower than the OBEGX Sharpe Ratio of 2.48. The chart below compares the historical Sharpe Ratios of ALTFX and OBEGX, 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

	ALTFX	OBEGX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.71	2.48	-1.77
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.16	0.30	-0.14
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.64	0.53	+0.10
Sharpe Ratio (All Time) Calculated using the full available price history	0.28	0.24	+0.04

Drawdowns

ALTFX vs. OBEGX - Drawdown Comparison

The maximum ALTFX drawdown since its inception was -80.01%, roughly equal to the maximum OBEGX drawdown of -83.07%. Use the drawdown chart below to compare losses from any high point for ALTFX and OBEGX.

Drawdown Indicators

	ALTFX	OBEGX	Difference
Max Drawdown Largest peak-to-trough decline	-80.01%	-83.07%	+3.06%
Max Drawdown (1Y) Largest decline over 1 year	-15.81%	-11.24%	-4.57%
Max Drawdown (3Y) Largest decline over 3 years	-22.92%	-25.41%	+2.49%
Max Drawdown (5Y) Largest decline over 5 years	-35.87%	-39.68%	+3.81%
Max Drawdown (10Y) Largest decline over 10 years	-35.87%	-41.54%	+5.67%
Current Drawdown Current decline from peak	-0.99%	0.00%	-0.99%
Average Drawdown Average peak-to-trough decline	-36.95%	-33.72%	-3.23%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.28%	3.10%	+2.18%

Volatility

ALTFX vs. OBEGX - Volatility Comparison

The current volatility for AB Sustainable Global Thematic Fund (ALTFX) is 4.89%, while Oberweis Global Opportunities Fund (OBEGX) has a volatility of 6.92%. This indicates that ALTFX experiences smaller price fluctuations and is considered to be less risky than OBEGX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ALTFX	OBEGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.89%	6.92%	-2.03%
Volatility (6M) Calculated over the trailing 6-month period	11.56%	16.00%	-4.44%
Volatility (1Y) Calculated over the trailing 1-year period	14.48%	20.47%	-5.99%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.19%	23.20%	-5.01%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.05%	22.63%	-4.58%

ALTFX vs. OBEGX - Expense Ratio Comparison

ALTFX has a 1.02% expense ratio, which is lower than OBEGX's 1.51% expense ratio.

Dividends

ALTFX vs. OBEGX - Dividend Comparison

ALTFX's dividend yield for the trailing twelve months is around 12.80%, more than OBEGX's 9.82% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ALTFX AB Sustainable Global Thematic Fund	12.80%	13.53%	8.18%	0.03%	2.61%	9.99%	7.23%	6.01%	8.36%	0.00%	4.05%	0.00%
OBEGX Oberweis Global Opportunities Fund	9.82%	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 ALTFX and OBEGX in my portfolio?

ALTFX and OBEGX have a correlation of 0.79, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, ALTFX or OBEGX?

OBEGX has higher volatility (6.92%) compared to ALTFX (4.89%). In terms of maximum drawdown, ALTFX dropped -80.01% vs OBEGX's -83.07%.

Which has better risk-adjusted returns?

OBEGX currently has the higher Sharpe Ratio (2.48 vs 0.71), 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.