Small capitalization common stocks are companies with a market capitalization of less than $1,000,000,000. Therefore, they normally come with a warning: "beware, the price might be particularly inefficient — and perhaps inefficient to the downside." This inefficiency of trading can cause irrational price dislocations for extended periods of time. This frequently limits the ever important factor of salability.
As Soro's says, "market prices always distort the underlying fundamentals" — but on small caps this effect is magnified by the general liquidity of the shares. The lower average trading volume makes price movements more discontinuous. As always, perform due diligence and invest at your own risk.
Please see also the General Securities Disclaimer.