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Oberweis Small-Cap Opportunities Fund (OBSOX) Sharpe Ratio: 2.39

Mutual Fund · Currency in USD · Last updated Jun 3, 2026

The fund invests normally at least 80% of its net assets in the securities of small-cap companies. Its investment adviser considers small-cap companies as those, at the time of initial investment, with a market capitalization of less than $5 billion or with a market capitalization within the range of the holdings of the Russell 2000 Index. The fund invests principally in the common stocks of companies that the adviser believes have the potential for significant long-term growth in market value. It invests in those companies which the adviser considers to have above-average long-term growth potential.

OBSOX's Sharpe Ratio of 2.39 indicates that for each unit of volatility, it generates 2.39 units of excess return above the risk-free rate. The ratio is calculated using historical daily returns over the past 12 months (as of Jun 3, 2026).

Sharpe uses total volatility (standard deviation) which includes both upside and downside price movements, making it useful for comparing risk-adjusted returns across different assets.

OBSOX Sharpe Ratio Rank

OBSOX Sharpe Ratio Rank: 66.767
Above Average

OBSOX ranks above 66.7% of all investments in our database based on Sharpe Ratio over the past 12 months, indicating above-average returns relative to volatility. Securities are ranked from 0 (worst) to 100 (best).

What moves the rank

  • Strong returns with low total volatility → Higher rank
  • High volatility (both upside and downside) → Lower rank
  • Consistent returns → Higher rank than volatile returns of same magnitude
  • Sharp drawdowns increase volatility → Lower rank

What you can do with this information

  • Above-average risk-adjusted returns with room for improvement
  • Compare against category peers to gauge relative positioning
  • Monitor for movement toward top tier or decline toward median
  • Consider pairing with top-tier holdings to improve portfolio efficiency

OBSOX Sharpe Ratio Market Positioning

The chart shows OBSOX's Sharpe Ratio relative to all mutual funds on our platform, with color zones indicating percentile rankings. Higher ratios indicate better risk-adjusted returns.

  • Red zone (bottom 25%): 1.42 or lower
  • Yellow zone (middle 50%): 1.42 to 2.51
  • Green zone (top 25%): 2.51 or higher
  • Top 1%: 4.65+
  • Median: 2.09 — half of all investments score higher

How it compares to other similar mutual funds

The table compares Oberweis Small-Cap Opportunities Fund's Sharpe Ratio with other mutual funds in the Small Cap Growth Equities category across multiple time periods, showing how OBSOX's risk-adjusted performance compares to similar funds.

Data shows 1-, 5-, and 10-year periods, plus each fund's all-time average, as of Jun 3, 2026.

SymbolName1Y Sharpe Ratio5Y Sharpe Ratio10Y Sharpe RatioAll Time Sharpe Ratio
NESIXNeedham Small Cap Growth Fund Institutional4.16
NESGXNeedham Small Cap Growth Fund4.11
NEAIXNeedham Aggressive Growth Fund Institutional Class3.71
NEAGXNeedham Aggressive Growth Fund3.67
HRSMXHood River Small-Cap Growth Fund3.22
OBMCXOberweis Micro Cap Fund3.09
DMCRXDriehaus Micro Cap Growth Fund2.97
FGROXEmerald Growth Fund Institutional Class2.88
HSPGXEmerald Growth Fund2.86
DSCIXDana Epiphany ESG Small Cap Equity Fund2.75
OBSOXOberweis Small-Cap Opportunities Fund2.39

S&P 500 Index

How to choose period

Historical Sharpe Ratio

The chart shows OBSOX's rolling Sharpe ratio over time compared to your chosen benchmark. Rising trends indicate improving returns relative to total volatility, while declining trends may signal deteriorating risk-adjusted performance or increased volatility. Use multiple timeframes to distinguish short-term fluctuations from long-term patterns.

Identify market cycles by observing when OBSOX consistently outperforms (line above benchmark), underperforms (below benchmark), or aligns with the benchmark.

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How does OBSOX fit in your portfolio?

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