Definition of mosquito for English Language Learners. : a small flying insect that bites the skin of people and animals and sucks their blood.
What it is: Small-cap stock refers to a company with a market capitalization (calculated by taking a firm's current share price and multiplying that figure by the total number of shares outstanding) near the low end of the publicly traded spectrum.
DEFINITION of 'Small-Value Stock'. A description of stock where the underlying company has a small market capitalization, and whose stock price is currently trading at or lower than its book value. Finding a stock that fits both of these criteria is difficult, but it could be a worthwhile venture, because small-value stocks generally yield high returns.