An index that measure the performance of a narrow market segment, such as biotechnology or small capitalization stocks.
See Also:
Index: A compilation of the prices of several common entities (stocks) into a single number. An index is a group of stocks which can be traded as one portfolio, such as the S&P 500. Broad-based indexes cover a wide range of industries and companies and narrow-based indexes cover stocks in one industry or economic sector.
SEC: The Securities and Exchange Commission. The SEC is an agency of the federal government which is in charge of monitoring and regulating the securities industry.
