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.
The Nasdaq Stock Market has three different market tiers: 1  Capital Market (small cap) is an equity market for companies that have relatively small levels of market capitalization. 2  Global Market (mid cap) is made up of stocks that represent the Nasdaq Global Market.