OBIOX vs. FMNEX

Last updated Aug 4, 2026

OBIOX (Oberweis International Opportunities Fund) and FMNEX (RBB Free Market International Equity Fund) are both Foreign Small & Mid Cap Equities funds. Over the past 10 years, OBIOX returned 6.39%/yr vs 9.83%/yr for FMNEX. Their correlation of 0.80 means they have usually moved in the same direction. OBIOX charges 1.60%/yr vs 0.56%/yr for FMNEX.

Performance

OBIOX vs. FMNEX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Oberweis International Opportunities Fund (OBIOX) and RBB Free Market International Equity Fund (FMNEX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, OBIOX achieves a 3.39% return, which is significantly lower than FMNEX's 12.36% return. Over the past 10 years, OBIOX has underperformed FMNEX with an annualized return of 6.39%, while FMNEX has yielded a comparatively higher 9.83% annualized return.

OBIOX

• 1D: -0.84%
• 1M: -4.26%
• 6M: -0.60%
• YTD: 3.39%
• 1Y: 6.84%
• 3Y*: 13.61%
• 5Y*: -1.93%
• 10Y*: 6.39%
• ALL TIME*: 7.81%

FMNEX

• 1D: -0.51%
• 1M: 1.81%
• 6M: 5.37%
• YTD: 12.36%
• 1Y: 30.07%
• 3Y*: 19.16%
• 5Y*: 11.45%
• 10Y*: 9.83%
• ALL TIME*: 5.75%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
FMNEX RBB Free Market International Equity Fund	$0.00	$0.00	$0.00
OBIOX Oberweis International Opportunities Fund	$0.00	$0.00	$0.00

OBIOX vs. FMNEX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OBIOX Oberweis International Opportunities Fund	3.39%	30.71%	7.54%	4.90%	-37.06%	1.41%	62.87%	22.87%	-26.57%	40.90%
FMNEX RBB Free Market International Equity Fund	12.36%	42.81%	2.15%	16.13%	-10.54%	14.50%	2.74%	17.72%	-19.58%	27.74%

Correlation

The correlation between OBIOX and FMNEX is 0.82, meaning they have usually moved in the same direction, including during past declines.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.82
Correlation (3Y) Balances recent behavior with more history.	0.81
Correlation (5Y) Shows whether the relationship held over a longer period.	0.83
Correlation (10Y) Provides a long-term view across more market conditions.	0.76
Correlation (All Time) Calculated using the full available price history since Jan 2, 2008	0.80

The correlation between OBIOX and FMNEX has been stable across timeframes, ranging from 0.76 to 0.83 - a consistent structural relationship.

Return for Risk

OBIOX vs. FMNEX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

OBIOX

OBIOX Risk / Return Rank: 10
OBIOX Sharpe Ratio Rank: 10
OBIOX Sortino Ratio Rank: 10
OBIOX Omega Ratio Rank: 10
OBIOX Calmar Ratio Rank: 9
OBIOX Martin Ratio Rank: 11

FMNEX

FMNEX Risk / Return Rank: 80
FMNEX Sharpe Ratio Rank: 84
FMNEX Sortino Ratio Rank: 80
FMNEX Omega Ratio Rank: 80
FMNEX Calmar Ratio Rank: 78
FMNEX Martin Ratio Rank: 77

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

OBIOX vs. FMNEX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Oberweis International Opportunities Fund (OBIOX) and RBB Free Market International Equity Fund (FMNEX). 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.

	OBIOX	FMNEX	Difference
Sharpe ratio: Return per unit of total volatility	0.42	2.08	-1.66
Sortino ratio: Return per unit of downside risk	0.72	2.86	-2.14
Omega ratio: Gain probability vs. loss probability	1.09	1.38	-0.29
Calmar ratio: Return relative to maximum drawdown	0.50	2.66	-2.17
Martin ratio: Return relative to average drawdown	1.56	9.87	-8.31

OBIOX vs. FMNEX - Sharpe Ratio Comparison

The current OBIOX Sharpe Ratio is 0.42, which is lower than the FMNEX Sharpe Ratio of 2.08. The chart below compares the historical Sharpe Ratios of OBIOX and FMNEX, 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

OBIOX vs. FMNEX - Drawdown Comparison

The maximum OBIOX drawdown since its inception was -71.17%, which is greater than FMNEX's maximum drawdown of -59.76%. Use the drawdown chart below to compare losses from any high point for OBIOX and FMNEX.

Drawdown Indicators

	OBIOX	FMNEX	Difference
Max Drawdown Largest peak-to-trough decline	-71.17%	-59.76%	-11.41%
Max Drawdown (1Y) Largest decline over 1 year	-15.64%	-11.38%	-4.26%
Max Drawdown (3Y) Largest decline over 3 years	-15.64%	-13.46%	-2.18%
Max Drawdown (5Y) Largest decline over 5 years	-51.47%	-26.61%	-24.86%
Max Drawdown (10Y) Largest decline over 10 years	-51.47%	-47.35%	-4.12%
Current Drawdown Current decline from peak	-15.72%	-0.63%	-15.09%
Average Drawdown Average peak-to-trough decline	-21.37%	-12.10%	-9.27%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.96%	3.07%	+1.89%

Volatility

OBIOX vs. FMNEX - Volatility Comparison

Oberweis International Opportunities Fund (OBIOX) has a higher volatility of 6.69% compared to RBB Free Market International Equity Fund (FMNEX) at 4.65%. This indicates that OBIOX's price experiences larger fluctuations and is considered to be riskier than FMNEX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OBIOX	FMNEX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.69%	4.65%	+2.04%
Volatility (6M) Calculated over the trailing 6-month period	16.33%	12.55%	+3.78%
Volatility (1Y) Calculated over the trailing 1-year period	18.60%	14.58%	+4.02%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	20.03%	15.64%	+4.39%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.84%	15.91%	+3.93%

OBIOX vs. FMNEX - Expense Ratio Comparison

OBIOX has a 1.60% expense ratio, which is higher than FMNEX's 0.56% expense ratio.

Dividends

OBIOX vs. FMNEX - Dividend Comparison

OBIOX's dividend yield for the trailing twelve months is around 1.06%, less than FMNEX's 4.17% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FMNEX RBB Free Market International Equity Fund	4.17%	4.69%	0.00%	2.49%	3.46%	1.31%	3.03%	2.56%	4.12%	3.30%	3.17%	3.60%
OBIOX Oberweis International Opportunities Fund	1.06%	1.10%	1.27%	0.43%	0.00%	20.69%	0.40%	1.23%	17.03%	11.47%	0.07%	0.19%

Frequently Asked Questions

Can I hold both OBIOX and FMNEX in my portfolio?

OBIOX and FMNEX have a correlation of 0.82, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, OBIOX or FMNEX?

OBIOX has higher volatility (6.69%) compared to FMNEX (4.65%). In terms of maximum drawdown, OBIOX dropped -71.17% vs FMNEX's -59.76%.

Which has better risk-adjusted returns?

FMNEX currently has the higher Sharpe Ratio (2.08 vs 0.42), 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.