What is Index Trading?

Legal Definition
Index Trading is a type of trading of a group of stocks which make up the index. An Index is a measurement of the value of a section of the stock market. It is computed from the prices of selected stocks. It may also be referred as a group of stock market publicly listed uppermost businesses within a region. There are numerous Stock Market Indices within the world such as S&P/ASX 200 (Australia), FTSE100 (London), CAC 40 (France), AEX index (Amsterdam), DAX (Germany), IBEX 35 and more.
-- Wikipedia