In financial markets, a share is a unit of account for various financial instruments including stocks, mutual funds, limited partnerships, and REIT's. A share is one of a finite number of equal portions in the capital of a company, entitling the owner to a proportion of distributed, non-reinvested profits known as dividends, and to a portion of the value of the company in case of liquidation. Shares can be voting or non-voting, meaning they either do or do not carry the right to vote on the board of directors and corporate policy. Whether this right exists often affects the value of the share. Voting and non-voting shares are also known as Class A and B shares respectively.

A share (also referred to as equity shares) of stock represents a share of ownership in a corporation.Stock typically takes the form of shares of common stock (or voting shares). As a unit of ownership, common stock typically carries voting rights that can be exercised in corporate decisions. Preferred stock differs from common stock in that it typically does not carry voting rights but is legally entitled to receive a certain level of dividend payments before any dividends can be issued to other shareholders. Convertible preferred stock is preferred stock that includes an option for the holder to convert the preferred shares into a fixed number of common shares, usually anytime after a predetermined date. Shares of such stock are called "convertible preferred shares" (or "convertible preference shares" in the United Kingdom). Although there is a great deal of commonality between the stocks of different companies, each new equity issue can have legal clauses attached to it that make it dynamically different from the more general cases. Some shares of common stock may be issued without the typical voting rights being included, for instance, or some shares may have special rights unique to them and issued only to certain parties.Not all equity shares are the same.(1)




(1) Source : Wikipedia