Market manipulation
From Wikipedia, the free encyclopedia
Market manipulation describes a deliberate attempt to interfere with the free and fair operation of the market and create artificial, false or misleading appearances with respect to the price of, or market for, a security, commodity or currency.[1]
Market manipulation is prohibited in the United States under Section 9(a)(2)[2] of the Securities Exchange Act of 1934, and in Australia under Section s 1041A of the Corporations Act 2001. The Act defines market manipulation as transactions which create an artificial price or maintain an artificial price for a tradeable security.
Examples
Pools: "Agreements, often written, among a group of traders to delegate authority to a single manager to trade in a specific stock for a specific period of time and then to share in the resulting profits or losses."[3]
Churning: "When a trader places both buy and sell orders at about the same price. The increase in activity is intended to attract additional investors, and increase the price."
Runs: "When a group of traders create activity or rumors in order to drive the price of a security up." An example is the Guinness share-trading fraud of the 1980s. In the US, this activity is usually referred to as painting the tape[4].
Ramping (the market): "Actions designed to artificially raise the market price of listed securities and to give the impression of voluminous trading, in order to make a quick profit."[5]
Wash trade: "Selling and repurchasing the same or substantially the same security for the purpose of generating activity and increasing the price"
Bear raid: "Attempting to push the price of a stock down by heavy selling or short selling."[6]
References
^ http://www.asx.com.au/supervision/participants/market_manipulation.htm
^ http://www.sec.gov/divisions/corpfin/34act/sect9.htm
^ Mahoney, Paul G., 1999. The Stock Pools and the Securities Exchange Act. Journal of Financial Economics 51, 343-369.
^ Painting The Tape
^ Sanford: Overview
^ Bear Raid: Definition and Much More from Answers.com
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