The stock market refers to public markets that exist for issuing, buying and selling stocks that trade on a stock exchange or over-the-counter. … Purposes of the Stock Market is Capital and Investment Income. NIFTY is National Stock Exchange Fifty . It represents the weighted average of 50 Indian company stocks…Sensex is Sensitive Index . It comprises 30 of the largest and most actively-traded stocks on the BSE. The benefit to companies from having their shares publicly traded is that they can issue new shares to raise capital for future investment