The Nifty and the Sensex are both indices.

The Sensex, also known as the BSE 30, is a stock market index comprising 30 well-established and financially sound companies listed on the Bombay Stock Exchange (BSE). Similarly, the Nifty is an indicator of the 50 top major companies on the National Stock Exchange (NSE).

Sensex and Nifty serve as indicators of overall market movement. If these indices rise, it usually means that most of the major stocks within the respective index have increased in value. Conversely, if the Nifty falls, it indicates that the majority of its constituent stocks on the NSE have declined.

Nifty Futures represent a type of index futures with the underlying asset being the S&P CNX Nifty index. Nifty Futures Contracts come with three expiration dates: the near month, mid-month, and far month. The expiration day for each contract is the last Thursday of every month. Nifty Futures are among the most actively traded contracts in India.