Insider trading
Insider trading is the trading of a public company's stock or other securities (such as bonds or stock options) based on material, nonpublic information about the company. In various countries, some kinds of trading based on insider information is illegal. The rationale for this prohibition of insider trading differs between countries/regions. Some view it as unfair to other investors in the market who do not have access to the information, as the investor with inside information could potentially make larger profits than an investor (without such information) could make. However, insider trading is also prohibited to prevent the director of a company (the insider) from abusing a company's confidential information for the director's personal gain.