Valuable documents that represent ownership or partnership, which are given by capital companies to their partners to document their shares and partnerships are called shares. It is also specified as one of the equivalent parts of a company's principal. When it comes to investing in the stock market, the first investment instrument that comes to everyone's mind is stocks. It is the name given to the valuable documents that are given to the partners of stock capital companies to document their shares and partnerships. In other words, it is also seen as one of the equivalent parts of a company's principal. Stocks also represent a property or partnership. Stocks do not have a standard return and their value varies according to the company's balance sheet earnings and investment decisions.