A criminal offense involving the purchase or sale of shares by someone who possesses 'inside' information about a company's performance and prospects which is not yet available to the market as a whole, and which if available might affect the share price.
INSIDER DEALING
Meaning of INSIDER DEALING in English
UNODC Money-Laundering terms English dictionary. Английский словарь терминов управления ООН по отмыванию денег, преступности и наркотикам. 2012