Abstract Margin system is the key factor for the safe working of the futures market. Once the margin is misappropriated, the degree of risk in the futures market is heightened and the legitimate interest of investors prejudiced. Through an analysis of the legal nature of margin, which is viewed as a special guarantee in this article, the author puts forth a proposal for the addition of the crime of misappropriating margin in China's criminal law so that such acts are punished with penal measures. The author also inquires into the ...