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.
Mutual funds that invest in stocks are typically categorized as large-cap, mid-cap, or small-cap funds. A mutual fund that is described as a large-cap fund is usually invested mainly in large-cap stocks.However, it is important to understand that not all mutual funds remain true to their categorizations. A large-cap fund may also invest in small cap stocks and other riskier types of securities.he smallest of the small-cap stocks are called micro-cap and nano-cap stocks. Micro-cap stocks ($50 million to $2 billion in market capitalization) and nano-cap stocks (market caps less than $50 million) are even riskier than small-cap stocks.