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This research mainly examines to gain highest performance of investment for taiwan 50 index by using qualified foreign Institutional investor buy and sell information. This research takes the amount of money for qualified foreign Institutional investor buy and sell and taiwan 50 index as research object.The research period is from July 1,2003 to March 31th,2009 and have 1387 data. Research technique use qualified foreign Institutional investor buy and sell information to set the investment buy and sell condition.It include buy strategy,sell strategy,buy and sell strategy to collocate one day, Continuously two days, Continuously three days, Continuously five days, Continuously ten days qualified foreign Institutional investor buy and sell information Simulated condition, examines Whether can gain highest performance of investment for taiwan 50 index. The conclusions of this research can be summarized as follow:(1)By the way of qualified foreign Institutional investor buy and sell information analysis,it really connote invest value information.(2)If does not consider trade cost,the best short-term invest strategy is trade when qualified foreign Institutional investor one day buy and sell, the best long-term invest strategy is trade when qualified foreign Institutional investor Continuously five days buy and sell,(3) If consider trade cost, the best invest strategy is trade when qualified foreign Institutional investor Continuously five days buy and sell.
Keywords: Qualified foreign institutional investor buy and sell,Invest value,Invest strategy, Buy and sell information analysis
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