Stock market definition

stock market, or (equity market), is a private or public market for the trading of company stock and derivatives of company stock at an agreed price; these are securities listed on a stock exchange as well as those only traded privately.

The size of the stock market is estimated at about $51 trillion. The world derivatives market has been estimated at about $480 trillion face or nominal value, 30 times the size of the U.S. economy. and 12 times the size of the entire world economy. It must be noted though that the value of the derivatives market, because it is stated in terms of national values, and cannot be directly compared to a stock or a fixed income security, which traditionally refers to an actual value . Many such relatively illiquid securities are valued as marked to model, rather than an actual market price.

The stocks are listed and traded on stock exchanges which are entities a corporation or mutual organization specialized in the business of bringing buyers and sellers of stocks and securities together. The stock market in the United States includes the trading of all securities listed on the NYSE, the NASDAQ, the Amex, as well as on the many regional exchanges, e.g. OTCBB and Pink Sheets. European examples of stock exchanges include the Paris Bourse, now part of Euronext, theLondon Stock Exchange and the Deutsche.

Or in other simpler definition

The market in which shares are issued and traded either through exchanges or over-the-counter markets. Also known as the equity market, it is one of the most vital areas of a market economy as it provides companies with access to capital and investors with a slice of ownership in the company and the potential of gains based on the company's future performance.

Notes:

This market can be split into two main sections: the primary and secondary market. The primary market is where new issues are first offered, with any subsequent trading going on in the secondary market.

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Allot Easyer Definition

Plain and simple, a “stock” is a share in the ownership of a company.

A stock represents a claim on the company's assets and earnings. As you acquire more stocks, your ownership stake in the company becomes greater.

Note: Some times different words like shares, equity, stocks etc. are used. All these words mean the same thing.