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Insider trading is said to occur when an individual with special knowledge of a
corporation uses this knowledge to
buy and/or sell securities such as stocks and bonds to make a profit. This special knowledge is known as material information and includes any pertinent knowledge about a company that is not known to the general public.
Suppose, for example, that a company is about to announce that its quarterly earnings were much higher than that which was forecasted in the previous quarter. An individual on the inside of the company, say a manager or vice present, who quickly buys up stock in the corporation knowing that the pending announcement will drive up the price of the company’s stock, is said to have engaged in insider trading. The underestimated quarterly sales is said to be material information not known to the general public.