Market manipulation
（重定向自Ramping）
Market manipulation is 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. Market manipulation is prohibited in most countries, in particular, it is prohibited in the United States under Section 9(a)(2) of the Securities Exchange Act of 1934, in Australia under Section 1041A of the Corporations Act 2001, and in Israel under Section 54(a) of the securities act of 1968. The Act defines market manipulation as transactions which create an artificial price or maintain an artificial price for a tradeable security. Market manipulation is also prohibited for wholesale electricity markets under Section 222 of the Federal Power Act and wholesale natural gas markets under Section 4A of the Natural Gas Act.