Small-cap stock

A small-cap stock is a share of a company with a relatively small market capitalization, commonly defined as roughly $300 million to $2 billion. The cutoffs are conventions, not rules, and different index providers draw them differently.

How it works

Market cap is share price times shares outstanding. Common bands:

The Russell 2000 and the S&P SmallCap 600 are the most cited small-cap benchmarks. Their membership rules differ, so a stock can be "small-cap" in one and not the other.

Why it matters for traders

Small caps react harder to news than large caps. A single FDA decision, contract or earnings surprise can be material to a $500 million company in a way it never is for a $500 billion one. Analyst coverage is thinner, so filings and press releases often reach the market before any research note.

Other traits to watch:

• Liquidity. Lower average volume and wider spreads mean bigger slippage.
• Financing risk. Many small caps burn cash and raise equity, so dilution is a recurring theme.
• Float matters. A small public float amplifies moves in both directions.
• Rate sensitivity. Small caps as a group tend to carry more floating-rate debt and are often treated as a bet on domestic growth and lower rates.

Example

Hypothetical Copperline Energy (ticker CPLE) has 50 million shares at $24, a $1.2 billion market cap, placing it squarely in small-cap territory. If the stock rallies to $44, its market cap reaches $2.2 billion and most screens would reclassify it as mid-cap.

FAQ

Are small caps riskier than large caps?

Generally they are more volatile and less liquid, and individual companies are more likely to fail or dilute. They also have more room to grow, which is why they attract risk-tolerant capital.