An index is a group of a specific type of securities. They can be stocks, derivatives, or other financial instruments. The index represents as well as tracks the performance of the asset class or the market segment.

Indices are used to track the performance of a group of securities. Indices show the overall performance of an asset class or market sector.

There are over 350 indices listed on the National Stock Exchange (NSE).

There are over 50 indices listed on BSE.

The Nifty 50 is the largest Indian index. It is one of the most actively traded indices in the world.