1. For some historical factors, the research on exchange rat e risk management in China is a late starter. And some foreign trade enterprises despise foreign exchange risk management. Moreover, China is very short of talents of professional risk management. All the weaknesses on risk management need improving.
    由于某些历史因素，对外汇风险管理的研究在国内起步较晚，我国一些外贸企业对外汇风险管理的认识仍然不够，专业的风险管理人才更是缺乏，各个方面都有待于进一步提高。

2. Second, we study the effect of the moral coefficient of the institutional investor for rat and the number of other institutional investors on the market equilibrium. 5. We study the return feature of rat trade stock.
    然后，考察了做仓机构投资者道德系数、机构投资者数量对于市场均衡特征的影响。五、研究了存在老鼠仓情况下的资产价格特征，即做仓股票的收益率特征。