Term · Liquidity & Trading
Volatility
In briefVolatility is the range of fluctuation in prices or returns, usually measured as standard deviation, and serves as a measure of short-term price risk. For illiquid small caps it is often elevated, because even small orders move the price, and it does not necessarily reflect operating risk.
Definition
Volatility measures the range of fluctuation in prices or returns over a period, usually as standard deviation. High volatility means larger swings both upward and downward. It is often used as a measure of a stock's short-term price risk.
How it is calculated
Formula. Volatility = standard deviation of returns over a period
Why it matters for small caps
Small caps often show higher volatility due to low liquidity, since even small orders move the price. High volatility makes entry and exit harder and can strongly distort valuation metrics in the short term.
Common misreadings
- Volatility is equated with actual business risk, even though it only measures price fluctuation and depends heavily on trading liquidity.
In the process
Frequently asked
How is volatility measured?
Usually as the standard deviation of price or return changes over a defined period.
Why is volatility often higher for small caps?
Due to low trading liquidity, even small orders move the price more strongly, which leads to larger swings.
Is high volatility the same as high risk?
Not necessarily; it only measures price fluctuation and not the underlying business or loss risk.
Related terms
Education only, not investment advice. Ranges and thresholds are didactic orientation values, not an official standard.