What Is a Small Cap?
Definition
Market capitalisation is a company's stock market value: the share price multiplied by the number of shares in issue. Small caps — in the German-speaking world also known as Nebenwerte (secondary-market stocks) — sit between mid-sized mid caps and very small micro caps. There are no fixed boundaries; index providers and banks use different cut-off points.
Why size shapes the character of a share
The smaller the company, the greater the impact a single event can have on its share price. For a group worth €50 billion on the stock market, a €10 million contract is a footnote; for a company worth €200 million, the same contract can move the price significantly. This leverage explains both the opportunities and the sharp falls.
Liquidity: the underrated factor
Small caps are often thinly traded. This leads to wide bid-ask spreads (the gap between the buying and selling price) and means that larger orders can move the price on their own. In turbulent periods it can become difficult to sell a position at all — a risk that remains invisible in calmer times.
Fewer analysts, less attention
Large companies are followed by dozens of analysts; many small caps are followed by none at all. In theory this creates an information advantage for attentive investors — but it also means that misvaluations go uncorrected for longer and that the quality of available information is thinner.
Common mistakes
- Confusing market capitalisation with enterprise value — the latter also takes debt and cash into account.
- Treating a low share price as 'cheap'. The price alone tells you nothing; what matters is the market capitalisation relative to the underlying business.
- Ignoring liquidity until the moment you want to sell.
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Educational content only, not investment advice. Small caps are highly speculative and total loss is possible. All information without warranty.