在中国股票市场中,政府行为无处不在,政府行为可以分为监管和调控。本文以2005年初至2007年末上海证券交易所股指为数据样本,先用“异常波动点”方法找出监管和调控事件,而后运用事件研究方法对比研究政府监管行为和调控行为对沪市行情的影响。研究表明,监管可以规范股市,有利于股市的健康发展;调控短期内容易造成股市的波动,长期内对股市无影响,且调控信息有提前泄露迹象。因而,建议对股市应多监管少调控,并应加强调控政策的信息发布管理工作。
There are lots of government acts in Chinese stock market. Government acts can be divided into supervision and regulation. This paper focuses on the Shanghai Stock Exchange from 2005 to 2007. Results show supervision is a positive influence and regulation a negative influence on the stock market. So, we suggest more supervision and less regulation on the stock market; at the same time information management of regulation should be strengthened.