A stock market is the place which connects a buyer and a seller. In order to invest in stock market you need to have a demat account. A person has many options in stock market viz intraday trading, investing, futures and options etc. SEBI is the body that regulates stock market. Companies need stock market to raise capital for their businesses. Individuals need stock market to buy and sell shares. Not everyone can start and run a business successfully. Stock market gives a chance to the individuals to be a part of the successful business.