The NASDAQ Biotechnology Index is a stock market index made up of securities of NASDAQ-listed companies classified according to the Industry Classification Benchmark as either the Biotechnology or the Pharmaceutical industry.[1] A list of the 225 components of the index is published online.
In order to remain included within the index, the components must meet the following criteria:
This index is tracked by several exchange-traded funds, the most liquid of which is the iShares Nasdaq Biotechnology (Nasdaq: IBB).[1]