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  • 學位論文

摩台指成分股宣告的資訊效果

The Information Effect of Announcement of MSCI Taiwan Index Components

指導教授 : 莊忠柱

摘要


本研究將除針對MSCI摩台指成分股異動中新增成分股與剔除成分股的價量效果,也以市場實際買賣觀點,利用日內資料針對MSCI成分股異動中新增與剔除成分股的隔日開盤與之後的收盤資料(open-to-close)、宣告日收盤與之後收盤資料探討價量變化,剖析隔夜效果(close-to-open)與買賣壓判定。 實證結果是在宣告日與後一日擁有顯著異常報酬現象,而剔除成分股則在宣告日前一日到後二日發現顯著異常報酬,此表示市場對剔除宣告反應較大。在執行日後,不管是新增成分股或剔除成分股都可發現顯著價格反轉現象。此外,在事件窗口在宣告日後有出現正的累積異常報酬,而剔除成分股也出現負的累積異常報酬;但在執行後窗口,出現負的累積異常報酬,而剔除成分股出現正的累積異常報酬。本研究結果符合價格壓力假說。

並列摘要


The research will aim MSCI at the Component Stocks added to or deleted in variation of price and volume effects. Also in actual market concept, using daily data to aim MSCI new and rejecting Component Stocks open-to-close data on next day, confer about price and quantity variable in closing quotation on claim day and after closing quotation data, analyzing close-to-open and judging the pressure in buy and sale. The result of proven on claim day and next day, it has unusual rewards. It found unusual reward on before claim day and two days later in rejecting Component Stocks. It shows the market has bigger response in rejective claim. After executived day, no matter new or reject stocks, it could be found reverse phenomenon no matter new stocks or reject stocks. Besides, the event appeared right accumulative rewards, it also showed in minus accumulative rewards. But in the executed windows, it appeared minus accumulative rewards, and rejective stocks appeared minus accumulative rewards, and rejective stocks also appeared right accumulative rewards. The research’s result conform with price pressure hypothesis.

並列關鍵字

MSCI Index Index Effect Price Pressure

參考文獻


七、陸姿華(2007)
一、葉銀華(1999)
國外相關文獻
一、Harris and Gurel(1986)
Harris and Gurel針對S&P500成份股的變動,自1973年至1983年共228檔股票新增事件的價量關係,但由於剔除事件有併購、破產等其他因素影響,故著重於事件的價量效果。作者利用個股成交量與NYSE總市場成交量相除得到成交量率,藉此比較事件前後是否有異常成交量變化。實證結果顯示:新增納入成分股事件,這些個股在宣告日有3%的異常報酬。但是在宣告日後兩週,價格出現反轉的現象。同時事件宣告後,市場上需求增加,帶動宣告日後出現短暫異常成交量。此篇著重新增個股事件,在宣告日後出現異常報酬,然後價格反轉,符合價格壓力假說。另外作者認為在長期完美需求曲線下,長期股價會回復到均衡價格,所以調整成分股事件對於未來預測是沒有訊息內涵。

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