|insider dealing or insider trading|
|dealing in company securities on a recognized stock exchange, with a view to making a profit or avoiding a loss, by a person who has confidential information about the securities that, if generally known, would affect their price. Its practice by those connected with a company is illegal|
|insider trading or insider trading|
|insider dealer or insider trading|
|insider trader or insider trading|
|a fool or simpleton; ninny.|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
The unlawful practice of using information that comes from a source “inside” the business but is not available to the general public to trade on the stock market. This activity is prohibited by law and is policed by the Securities and Exchange Commission.
Note: In the mid-1980s, several revelations of insider trading rocked Wall Street.