The worldâs coral reefs will quickly dissolve if greenhouse gas emissions continue on current trends, a new simulation hasâ¦
noun, plural indexes, indices. [in-duh-seez] /ËÉªn dÉËsiz/ (Show IPA) 1. (in a nonfiction book, monograph, etc.) a more or less detailed alphabetical listing of names, places, and topics along with the numbers of the pages on which they are mentioned or discussed, usually included in or constituting the back matter.
Notice the large dot-com spike on the NASDAQ, a result of the large number of technology companies on that index. A stock index or stock market index is a measurement of the value of a section of the stock market. It is computed from the prices of selected stocks (typically a weighted average). It is a tool used by investors and financial managers to describe the market, and to compare the return on specific investments. An index is a mathematical construct, so it may not be invested in directly.