Market manipulation can be checked to some extent by reducing inside trades.

This paper makes analysis and research on the causes of the inside trade in the stock market,the "Chinese Wall",the self-contained system of the stock exchangers,and the civil liability in our country s stock law.

The inside trade refers to inside personnel or other personnel who obtained inside information illegally,with the purpose of obtaining the interests or reducing losses,utilized the inside information and are engaged in the activity of the securities trading.

Insider trading and the efficiency of stock prices;

The System Design for Insider Trading Regulation Based on the Principle of Call-put Parity;

Legal analysis of prohibiting insider trading;

Research on the Responsibility Imputation Theory of American Insider Dealing;

,it s indicated that strict policies should be taken to insider dealing crime,which include: extending the prison terms,adding life imprisonment,changing the multiple pecuniary penalty to unlimited penalty;bringing civil liability and administrative liability into play,intensifying unified administration of supervision departments and enduing supervision departments with more power.

Owing to the difference of legislation models of various countries,the control forms of insider dealing and stock price manipulating behavior in stock repurchasing are rather different.