/ɪnˈsaɪdər ˈtreɪdɪŋ/ – Phrase
Definition: Mua bán chứng khoán dựa trên thông tin nội bộ không công bố công khai.
A more thorough explanation: the illegal buying or selling of shares with the help of corporate information that is not available to the public
Example: Mr Smith’s stock sale was the subject of an insider trading investigation, after rumours that he was acting on a tip from an insider.