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OBSOX vs. VOO
Performance
Risk-Adjusted Performance
Dividends
Drawdowns
Volatility

Correlation

The correlation between OBSOX and VOO is 0.81, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.


-0.50.00.51.0
Correlation: 0.8

Performance

OBSOX vs. VOO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Oberweis Small-Cap Opportunities Fund (OBSOX) and Vanguard S&P 500 ETF (VOO). The values are adjusted to include any dividend payments, if applicable.

100.00%200.00%300.00%400.00%500.00%600.00%NovemberDecember2025FebruaryMarchApril
145.96%
552.28%
OBSOX
VOO

Key characteristics

Sharpe Ratio

OBSOX:

-0.09

VOO:

0.57

Sortino Ratio

OBSOX:

0.06

VOO:

0.92

Omega Ratio

OBSOX:

1.01

VOO:

1.13

Calmar Ratio

OBSOX:

-0.06

VOO:

0.58

Martin Ratio

OBSOX:

-0.26

VOO:

2.42

Ulcer Index

OBSOX:

8.73%

VOO:

4.51%

Daily Std Dev

OBSOX:

26.49%

VOO:

19.17%

Max Drawdown

OBSOX:

-86.25%

VOO:

-33.99%

Current Drawdown

OBSOX:

-33.97%

VOO:

-10.56%

Returns By Period

In the year-to-date period, OBSOX achieves a -11.61% return, which is significantly lower than VOO's -6.43% return. Over the past 10 years, OBSOX has underperformed VOO with an annualized return of 3.29%, while VOO has yielded a comparatively higher 12.02% annualized return.


OBSOX

YTD

-11.61%

1M

-6.44%

6M

-13.31%

1Y

-4.41%

5Y*

14.81%

10Y*

3.29%

VOO

YTD

-6.43%

1M

-4.99%

6M

-5.02%

1Y

9.61%

5Y*

15.88%

10Y*

12.02%

*Annualized

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OBSOX vs. VOO - Expense Ratio Comparison

OBSOX has a 1.25% expense ratio, which is higher than VOO's 0.03% expense ratio.


Expense ratio chart for OBSOX: current value is 1.25%, compared with the broader market range of 0.00% to 2.12%.0.50%1.00%1.50%2.00%
OBSOX: 1.25%
Expense ratio chart for VOO: current value is 0.03%, compared with the broader market range of 0.00% to 2.12%.0.50%1.00%1.50%2.00%
VOO: 0.03%

Risk-Adjusted Performance

OBSOX vs. VOO — Risk-Adjusted Performance Rank

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

OBSOX
The Risk-Adjusted Performance Rank of OBSOX is 2020
Overall Rank
The Sharpe Ratio Rank of OBSOX is 2020
Sharpe Ratio Rank
The Sortino Ratio Rank of OBSOX is 2222
Sortino Ratio Rank
The Omega Ratio Rank of OBSOX is 2222
Omega Ratio Rank
The Calmar Ratio Rank of OBSOX is 2020
Calmar Ratio Rank
The Martin Ratio Rank of OBSOX is 1919
Martin Ratio Rank

VOO
The Risk-Adjusted Performance Rank of VOO is 6666
Overall Rank
The Sharpe Ratio Rank of VOO is 6464
Sharpe Ratio Rank
The Sortino Ratio Rank of VOO is 6464
Sortino Ratio Rank
The Omega Ratio Rank of VOO is 6666
Omega Ratio Rank
The Calmar Ratio Rank of VOO is 7070
Calmar Ratio Rank
The Martin Ratio Rank of VOO is 6767
Martin Ratio Rank
The risk-adjusted ranks indicate the investment's position relative to the market. A rank closer to 100 signifies top-performing investments, while a rank closer to 0 might suggest underperformance, based on the selected ratio. The values are calculated based on the past 12 months of returns.

OBSOX vs. VOO - Risk-Adjusted Performance Comparison

This table presents a comparison of risk-adjusted performance metrics for Oberweis Small-Cap Opportunities Fund (OBSOX) and Vanguard S&P 500 ETF (VOO). 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.


The chart of Sharpe ratio for OBSOX, currently valued at -0.09, compared to the broader market-1.000.001.002.003.00
OBSOX: -0.09
VOO: 0.57
The chart of Sortino ratio for OBSOX, currently valued at 0.06, compared to the broader market-2.000.002.004.006.008.00
OBSOX: 0.06
VOO: 0.92
The chart of Omega ratio for OBSOX, currently valued at 1.01, compared to the broader market0.501.001.502.002.503.00
OBSOX: 1.01
VOO: 1.13
The chart of Calmar ratio for OBSOX, currently valued at -0.08, compared to the broader market0.002.004.006.008.0010.00
OBSOX: -0.08
VOO: 0.58
The chart of Martin ratio for OBSOX, currently valued at -0.26, compared to the broader market0.0010.0020.0030.0040.0050.00
OBSOX: -0.26
VOO: 2.42

The current OBSOX Sharpe Ratio is -0.09, which is lower than the VOO Sharpe Ratio of 0.57. The chart below compares the historical Sharpe Ratios of OBSOX and VOO, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.


Rolling 12-month Sharpe Ratio-1.000.001.002.003.004.00NovemberDecember2025FebruaryMarchApril
-0.09
0.57
OBSOX
VOO

Dividends

OBSOX vs. VOO - Dividend Comparison

OBSOX has not paid dividends to shareholders, while VOO's dividend yield for the trailing twelve months is around 1.39%.


TTM20242023202220212020201920182017201620152014
OBSOX
Oberweis Small-Cap Opportunities Fund
0.00%0.00%0.00%0.00%0.00%0.00%0.00%0.00%0.00%0.00%0.00%0.00%
VOO
Vanguard S&P 500 ETF
1.39%1.24%1.46%1.69%1.25%1.54%1.88%2.06%1.78%2.02%2.10%1.85%

Drawdowns

OBSOX vs. VOO - Drawdown Comparison

The maximum OBSOX drawdown since its inception was -86.25%, which is greater than VOO's maximum drawdown of -33.99%. Use the drawdown chart below to compare losses from any high point for OBSOX and VOO. For additional features, visit the drawdowns tool.


-30.00%-25.00%-20.00%-15.00%-10.00%-5.00%0.00%NovemberDecember2025FebruaryMarchApril
-19.62%
-10.56%
OBSOX
VOO

Volatility

OBSOX vs. VOO - Volatility Comparison

Oberweis Small-Cap Opportunities Fund (OBSOX) has a higher volatility of 17.02% compared to Vanguard S&P 500 ETF (VOO) at 13.97%. This indicates that OBSOX's price experiences larger fluctuations and is considered to be riskier than VOO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.


0.00%5.00%10.00%15.00%NovemberDecember2025FebruaryMarchApril
17.02%
13.97%
OBSOX
VOO