CAEIX vs. OBEGX

Last updated Jun 4, 2026

CAEIX (Calvert Global Energy Solutions Fund) and OBEGX (Oberweis Global Opportunities Fund) are both Global Equities funds. Over the past 10 years, CAEIX returned 11.83%/yr vs 12.03%/yr for OBEGX. A 0.75 correlation means they provide meaningful diversification when combined. CAEIX charges 0.99%/yr vs 1.51%/yr for OBEGX.

Performance

CAEIX vs. OBEGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Calvert Global Energy Solutions Fund (CAEIX) 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, CAEIX achieves a 23.10% return, which is significantly lower than OBEGX's 28.94% return. Both investments have delivered pretty close results over the past 10 years, with CAEIX having a 11.83% annualized return and OBEGX not far ahead at 12.03%.

CAEIX

• 1D: 1.24%
• 1M: 4.18%
• YTD: 23.10%
• 6M: 23.57%
• 1Y: 49.07%
• 3Y*: 13.90%
• 5Y*: 6.54%
• 10Y*: 11.83%

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)

CAEIX vs. OBEGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
CAEIX Calvert Global Energy Solutions Fund	23.10%	32.61%	-7.13%	5.67%	-17.43%	6.73%	61.52%	33.48%	-19.26%	29.65%
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 CAEIX and OBEGX is 0.73, 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	0.73
Correlation (3Y) Calculated over the trailing 3-year period	0.75
Correlation (5Y) Calculated over the trailing 5-year period	0.81
Correlation (10Y) Calculated over the trailing 10-year period	0.79
Correlation (All Time) Calculated using the full available price history since Jun 1, 2007	0.75

The correlation between CAEIX and OBEGX has been stable across timeframes, ranging from 0.73 to 0.81 - a consistent structural relationship.

Return for Risk

CAEIX vs. OBEGX — Risk / Return Rank

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

CAEIX

CAEIX Risk / Return Rank: 89
CAEIX Sharpe Ratio Rank: 92
CAEIX Sortino Ratio Rank: 84
CAEIX Omega Ratio Rank: 80
CAEIX Calmar Ratio Rank: 95
CAEIX Martin Ratio Rank: 94

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.

CAEIX vs. OBEGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Calvert Global Energy Solutions Fund (CAEIX) 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.

	CAEIX	OBEGX	Difference
Sharpe ratio: Return per unit of total volatility	3.08	2.48	+0.60
Sortino ratio: Return per unit of downside risk	3.95	3.27	+0.67
Omega ratio: Gain probability vs. loss probability	1.52	1.42	+0.10
Calmar ratio: Return relative to maximum drawdown	6.03	4.50	+1.53
Martin ratio: Return relative to average drawdown	20.83	16.29	+4.53
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

CAEIX vs. OBEGX - Sharpe Ratio Comparison

The current CAEIX Sharpe Ratio is 3.08, which is comparable to the OBEGX Sharpe Ratio of 2.48. The chart below compares the historical Sharpe Ratios of CAEIX 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

	CAEIX	OBEGX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	3.08	2.48	+0.60
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.34	0.30	+0.04
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.60	0.53	+0.07
Sharpe Ratio (All Time) Calculated using the full available price history	0.07	0.24	-0.18

Drawdowns

CAEIX vs. OBEGX - Drawdown Comparison

The maximum CAEIX drawdown since its inception was -75.81%, smaller than the maximum OBEGX drawdown of -83.07%. Use the drawdown chart below to compare losses from any high point for CAEIX and OBEGX.

Drawdown Indicators

	CAEIX	OBEGX	Difference
Max Drawdown Largest peak-to-trough decline	-75.81%	-83.07%	+7.26%
Max Drawdown (1Y) Largest decline over 1 year	-8.39%	-11.24%	+2.85%
Max Drawdown (3Y) Largest decline over 3 years	-24.57%	-25.41%	+0.84%
Max Drawdown (5Y) Largest decline over 5 years	-32.58%	-39.68%	+7.10%
Max Drawdown (10Y) Largest decline over 10 years	-37.54%	-41.54%	+4.00%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-48.64%	-33.72%	-14.92%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.42%	3.10%	-0.68%

Volatility

CAEIX vs. OBEGX - Volatility Comparison

The current volatility for Calvert Global Energy Solutions Fund (CAEIX) is 5.76%, while Oberweis Global Opportunities Fund (OBEGX) has a volatility of 6.92%. This indicates that CAEIX 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

	CAEIX	OBEGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.76%	6.92%	-1.16%
Volatility (6M) Calculated over the trailing 6-month period	12.91%	16.00%	-3.09%
Volatility (1Y) Calculated over the trailing 1-year period	16.43%	20.47%	-4.04%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.18%	23.20%	-4.02%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.69%	22.63%	-2.94%

CAEIX vs. OBEGX - Expense Ratio Comparison

CAEIX has a 0.99% expense ratio, which is lower than OBEGX's 1.51% expense ratio.

Dividends

CAEIX vs. OBEGX - Dividend Comparison

CAEIX's dividend yield for the trailing twelve months is around 0.59%, less than OBEGX's 9.82% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
CAEIX Calvert Global Energy Solutions Fund	0.59%	0.72%	1.17%	1.07%	0.86%	0.49%	0.82%	1.23%	2.00%	1.40%	1.79%	0.72%
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 CAEIX and OBEGX in my portfolio?

CAEIX and OBEGX have a correlation of 0.73, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, CAEIX or OBEGX?

OBEGX has higher volatility (6.92%) compared to CAEIX (5.76%). In terms of maximum drawdown, CAEIX dropped -75.81% vs OBEGX's -83.07%.

Which has better risk-adjusted returns?

CAEIX currently has the higher Sharpe Ratio (3.08 vs 2.48), 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.