( 2 ) it imports asymmetric - information theory to chinese securities market research , and indicates that there is serious asymmetric information in chinese securities market . ( 3 ) it analysis the causes of low effic ( 2 )將市場信息不對稱理論引人到我國證券市場的研究中,并指出我國證券市場存在嚴重的信息不對稱。