Amazon

Amazon.com, Inc. (NASDAQ: AMZN) is an American-based multinational electronic commerce company. Headquartered in Seattle, Washington, it is America's largest online retailer, with nearly three times the internet sales revenue of runner up Staples, Inc.

Jeff Bezos founded Amazon.com, Inc. in 1994 and launched it online in 1995. It started as an on-line bookstore but soon diversified to product lines of VHS, DVD, music CDs and MP3s, computer software, video games, electronics, apparel, furniture, food, toys, etc. Amazon has established separate websites in Canada, the United Kingdom, Germany, France, China, and Japan. It also provides international shipping to certain countries for some of its products.

On January 15, 2009, a survey published by Verdict Research found that Amazon was the UK's favorite music and video retailer, and came third in overall retail rankings.

The Web site CDNOW (cdnow.com) is powered and hosted by Amazon. Until June 30, 2006, typing ToysRUs.com into a browser would similarly bring up Amazon.com's Toys & Games tab; however, this relationship was terminated as the result of a lawsuit.

Amazon.com powers and operates retail web sites for Target, Sears Canada, Benefit Cosmetics, Bebe Stores, Timex Corporation, Marks & Spencer, Mothercare, and Lacoste. For a growing number of enterprise clients, currently including the UK merchants Marks & Spencer, Benefit Cosmetics' UK entity and Mothercare, Amazon provides a unified multichannel platform whence a customer can interchangeably interact with the retail website, standalone in-store terminals, and phone-based customer service agents. Amazon Web Services also powers AOL's Shop@AOL.

WalMart

WalMart Stores, Inc. (or Walmart as written in its new logo) is an American public corporation that runs a chain of large, discount department stores. It is the world's largest public corporation by revenue, according to the 2008 Fortune Global 500. Founded by Sam Walton in 1962, it was incorporated on October 31, 1969, and listed on the New York Stock Exchange in 1972. It is the largest private employer in the world and the third-largest utility or commercial employer, trailing the British National Health Service, and the Indian Railways. WalMart is the largest grocery retailer in the United States, with an estimated 20% of the retail grocery and consumables business. It also owns and operates the North American company, Sam's Club.

WalMart operates in Mexico as Walmex, in the UK as ASDA, and in Japan as Seiyu. It has wholly owned operations in Argentina, Brazil, Canada, and Puerto Rico. Wal-Mart's investments outside North America have had mixed results: its operations in South America and China are highly successful, while it was forced to pull out of Germany and South Korea when ventures there were unsuccessful.

WalMart has been criticized by some community groups, women's rights groups, grassroots organizations, and labor unions, specifically for its extensive foreign product sourcing, low rates of employee health insurance enrollment, resistance to union representation, and alleged sexism.

Stock

In business and finance, a share (also referred to as equity share) of stock means a share of ownership in a corporation (company). In the plural, stocks is often used as a synonym for shares especially in the United States, but it is less commonly used that way outside of North America.

In the United Kingdom, South Africa, and Australia, stock can also refer to completely different financial instruments such as government bonds or, less commonly, to all kinds of marketable securities.

Selling stock is procedurally similar to buying stock. Generally, the investor wants to buy low and sell high, if not in that order (short selling); although a number of reasons may induce an investor to sell at a loss, e.g., to avoid further loss.

As with buying a stock, there is a transaction fee for the broker's efforts in arranging the transfer of stock from a seller to a buyer. This fee can be high or low depending on which type of brokerage, full service or discount, handles the transaction.

Stock exchange

A stock exchange, securities exchange or (in Europe) bourse is a corporation or mutual organization which provides "trading" facilities for stock brokers and traders, to trade stocks and other securities. Stock exchanges also provide facilities for the issue and redemption of securities as well as other financial instruments and capital events including the payment of income and dividends. The securities traded on a stock exchange include: shares issued by companies, unit trusts and other pooled investment products and bonds. To be able to trade a security on a certain stock exchange, it has to be listed there. Usually there is a central location at least for recordkeeping, but trade is less and less linked to such a physical place, as modern markets are electronic networks, which gives them advantages of speed and cost of transactions. Trade on an exchange is by members only. The initial offering of stocks and bonds to investors is by definition done in the primary market and subsequent trading is done in the secondary market. A stock exchange is often the most important component of a stock market. Supply and demand in stock markets is driven by various factors which, as in all free markets, affect the price of stocks (see stock valuation).

There is usually no compulsion to issue stock via the stock exchange itself, nor must stock be subsequently traded on the exchange. Such trading is said to be off exchange or over-the-counter. This is the usual way that bonds are traded. Increasingly, stock exchanges are part of a global market for securities.

Financial accelerator

The financial accelerator effect occurs when a firm acquires large profits beyond previously required cash flows, allowing the firm to invest in positive net present value projects, which in turn increase profits further. This cycle of increased financial resources accelerates until firm is unable to find other positive NPV investments.

Macroeconomic theorists, such as Ben Bernanke, have found increasing theoretical and empirical evidence to suggest financial accelerator effects in macroeconomic phenomena such as flight to quality and the broader business cycle.