/ɪnˈsaɪdər ˈdiːlɪŋ/ – Phrase
Definition: việc mua bán chứng khoán dựa trên thông tin nội bộ không công bố công khai.
A more thorough explanation: the use of confidential, price-sensitive information when trading in stocks and other securities
Example: The London Stock Exchange has launched an investigation into possible insider dealing.