A company issues shares in exchange for capital when it dose it for the first time it is called IPO. Stock market is a place where buyers and sellers meet to exchange shares .The share holders appoint the director of the company who plans and excites future projects .SEBI is a governing body that ensures transparency of the company to the investors. A participant in the stock market can be an investor or a trader. Average of NSE Nifty Average of BSE Sensex.