The purpose of Stock market is to create a platform where buyers could meet the sellers and vis versa. Important terms to remember before entering into the stock market stock, face value, dividend, share price, split-share, IPO, secondary market, shareholders, etc.SENSEX is a index that by overall refers to the top performing stocks in BSE. Nifty is a index value that represents the top 50 performers in NSE. Nifty and Sensex values are calculated purely based on the progress/decline movements of their corresponding top 50 and 30 companies.