When most people hear the term “insider trading” they think of the illegal version. However, the term “insider trading” can also mean the perfectly legal buying and selling of stock by a company’s corporate insiders. Insider trading is legal when these corporate insiders trade stock of their own company and report these trades to the U.S. Securities and Exchange Commission (SEC). That way the insider trading is not kept a secret and anyone can find out a corporate insider’s opinion of his or her company.
Insider trading is only illegal when a person bases their trade of stocks in a public company on information that the public does not know. It is illegal to trade your own stock in a company based on this information but it is also illegal to give someone that information, a tip, so they can trade their stock. http://economics.about.com/cs/financ...er_trading.htm