insider dealing
noun [ U ] uk/ˌɪn.saɪ.də ˈdiː.lɪŋ/ us/ˌɪn.saɪ.dɚ ˈdiː.lɪŋ/ (also insider trading)
（利用内幕消息非法买卖公司股票的）内部交易
the illegal buying and selling of shares in a company by people who have special information because they are involved with the company