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.
TSP S Fund. Summary: The TSP S Fund (Small Cap Stock Index Investment Fund) invests in stocks of small to medium-sized U.S. companies. The TSP S Fund seeks to match the performance of the Dow Jones U.S. Completion Total Stock Market Index, a broad market index made up of stocks of U.S. companies not included in the S&P 500 Index. In contrast to the large capitalization stocks in the S&P 500, the stocks in this index are small to medium-sized U.S. companies.