Stock

Stocks consist of all the shares by which ownership of a corporation or company is divided. A single share of the stock means fractional ownership of the corporation in proportion to the total number of shares. This typically entitles the shareholder to that fraction of the company's earnings, proceeds from liquidation of assets, or voting power, often dividing these up in proportion to the number of like shares each stockholder owns. Not all stock is necessarily equal, as certain classes of stock may be issued, for example, without voting rights, with enhanced voting rights, or with a certain priority to receive profits or liquidation proceeds before or after other classes of shareholders.
Stock can be bought and sold privately or on stock exchanges. Transactions of the former are closely overseen by governments and regulatory bodies to prevent fraud, protect investors, and benefit the larger economy. As new shares are issued by a company, the ownership and rights of existing shareholders are diluted in return for cash to sustain or grow the business. Companies can also buy back stock, which often lets investors recoup the initial investment plus capital gains from subsequent rises in stock price. Stock options issued by many companies as part of employee compensation do not represent ownership, but represent the right to buy ownership at a future time at a specified price. This would represent a windfall to the employees if the option were exercised when the market price is higher than the promised price, since if they immediately sold the stock they would keep the difference.
Stock bought and sold in private markets fall within the private equity realm of finance.

A person who owns a percentage of the stock has the ownership of the corporation proportional to their share. The shares form a stock; the stock of a corporation is partitioned into shares, the total of which are stated at the time of business formation. Additional shares may subsequently be authorized by the existing shareholders and issued by the company. In some jurisdictions, each share of stock has a certain declared par value, which is a nominal accounting value used to represent the equity on the balance sheet of the corporation. In other jurisdictions, however, shares of stock may be issued without associated par value.
Shares represent a fraction of ownership in a business. A business may declare different types of shares, each having distinctive ownership rules, privileges, or share values. Ownership of shares may be documented by issuance of a stock certificate. A stock certificate is a legal document that specifies the number of shares owned by the shareholder, and other specifics of the shares, such as the par value, if any, or the class of the shares.
In the United Kingdom, Republic of Ireland, South Africa, and Australia, stock can also refer, less commonly, to all kinds of marketable securities.

Types

Stock typically takes the form of shares of either common stock or preferred stock. 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 the ability of the holder to convert the preferred shares into a fixed number of common shares, usually any time after a predetermined date. Shares of such stock are called "convertible preferred shares".
New equity issue may have specific legal clauses attached that differentiate them from previous issues of the issuer. Some shares of common stock may be issued without the typical voting rights, for instance, or some shares may have special rights unique to them and issued only to certain parties. Often, new issues that have not been registered with a securities governing body may be restricted from resale for certain periods of time.
Preferred stock may be hybrid by having the qualities of bonds of fixed returns and common stock voting rights. They also have preference in the payment of dividends over common stock and also have been given preference at the time of liquidation over common stock. They have other features of accumulation in dividend. In addition, preferred stock usually comes with a letter designation at the end of the security; for example, Berkshire-Hathaway Class "B" shares sell under stock ticker BRK.B, whereas Class "A" shares of ORION DHC, Inc will sell under ticker OODHA until the company drops the "A" creating ticker OODH for its "Common" shares only designation. This extra letter does not mean that any exclusive rights exist for the shareholders but it does let investors know that the shares are considered for such, however, these rights or privileges may change based on the decisions made by the underlying company.

Rule 144 stock

"Rule 144 Stock" is an American term given to shares of stock subject to SEC Rule 144: Selling Restricted and Control Securities. Under Rule 144, restricted and controlled securities are acquired in unregistered form. Investors either purchase or take ownership of these securities through private sales from the issuing company or from an affiliate of the issuer. Investors wishing to sell these securities are subject to different rules than those selling traditional common or preferred stock. These individuals will only be allowed to liquidate their securities after meeting the specific conditions set forth by SEC Rule 144. Rule 144 allows public re-sale of restricted securities if a number of different conditions are met.

Stock derivatives

A stock derivative is any financial instrument for which the underlying asset is the price of an equity. Futures and options are the main types of derivatives on stocks. The underlying security may be a stock index or an individual firm's stock, e.g. single-stock futures.
Stock futures are contracts where the buyer is long, i.e., takes on the obligation to buy on the contract maturity date, and the seller is short, i.e., takes on the obligation to sell. Stock index futures are generally delivered by cash settlement.
A stock option is a class of option. Specifically, a call option is the right to buy stock in the future at a fixed price and a put option is the right to sell stock in the future at a fixed price. Thus, the value of a stock option changes in reaction to the underlying stock of which it is a derivative. The most popular method of valuing stock options is the Black–Scholes model. Apart from call options granted to employees, most stock options are transferable.

History

During the Roman Republic, the state contracted out many of its services to private companies. These government contractors were called publicani, or societas publicanorum as individual companies. These companies were similar to modern corporations, or joint-stock companies more specifically, in a couple of aspects. They issued shares called partes and particulae which were small shares that acted like today's over-the-counter shares. Polybius mentions that "almost every citizen" participated in the government leases. There is also evidence that the price of stocks fluctuated. The Roman orator Cicero speaks of partes illo tempore carissimae, which means "shares that had a very high price at that time". This implies a fluctuation of price and stock market behavior in Rome.
Around 1250 in France at Toulouse, 100 shares of the Société des Moulins du Bazacle, or Bazacle Milling Company were traded at a value that depended on the profitability of the mills the society owned.
In 1288, the Bishop of Västerås acquired a 12.5% interest in Great Copper Mountain which contained the Falun Mine. The Swedish mining and forestry products company Stora has documented a stock transfer, in 1288 in exchange for an estate.
The earliest recognized joint-stock company in modern times was the English East India Company. It was granted an English Royal Charter by Elizabeth I on 31 December 1600, with the intention of favouring trade privileges in India. The Royal Charter effectively gave the newly created Honourable East India Company a 15-year monopoly on all trade in the East Indies.
Soon afterwards, in 1602, the Dutch East India Company issued the first shares that were made tradeable on the Amsterdam Stock Exchange. Between 1602 and 1796 it traded 2.5 million tons of cargo with Asia on 4,785 ships and sent a million Europeans to work in Asia.

Shareholder

A shareholder is an individual or company that legally owns one or more shares of stock in a joint stock company. Both private and public traded companies have shareholders.
Shareholders are granted special privileges depending on the class of stock, including the right to vote on matters such as elections to the board of directors, the right to share in distributions of the company's income, the right to purchase new shares issued by the company, and the right to a company's assets during a liquidation of the company. However, shareholder's rights to a company's assets are subordinate to the rights of the company's creditors.
Shareholders are one type of stakeholders, who may include anyone who has a direct or indirect equity interest in the business entity or someone with a non-equity interest in a non-profit organization. Thus it might be common to call volunteer contributors to an association stakeholders, even though they are not shareholders.
Although directors and officers of a company are bound by fiduciary duties to act in the best interest of the shareholders, the shareholders themselves normally do not have such duties towards each other.
However, in a few unusual cases, some courts have been willing to imply such a duty between shareholders. For example, in California, United States, majority shareholders of closely held corporations have a duty not to destroy the value of the shares held by minority shareholders.
The largest shareholders are often mutual funds, and, especially, passively managed exchange-traded funds.