In the second part, starting with the definition of the insider trading in the securities market, the author introduces the insider and material nonpublic information, lastly analyses the harmfulness.

• 第二部分是对证券市场内幕交易的界定及其危害性分析，首先从内幕交易的概念入手，接着介绍了内幕人员和内幕信息，最后分析了内幕交易的危害性。