2017-07-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/682003摘要:本計畫之目的為利用臺灣股票市場中出現的特殊現象,探討公開錯誤資訊對資本市場之影響。該現象係源自於除權息參考價之計算方式,臺灣證券交易所「臺灣證券交易所股份有限公司營業細則」第六十七條修訂後,將員工紅利轉增資之狀況排除在除權除息交易之外,同時亦調整除權息參考價之計算公式,調整方式為該細則修訂後,計算除權息參考價時,不再把員工紅利配股率納入公式計算。修正理由則為因應員工分紅費用化而將員工紅利配股率排除於除權息交易外。但若仔細思考該修正理由,則會產生一個疑問:為何未採員工分紅費用化時,除權息參考價需將員工紅利配股率納入公式計算?除權息參考價計算之基礎在於讓參與除權除息之投資人,其報酬與未參與之投資人相同,即投資人若在除權除息日前一天買入股票,隔天賣出之價格加上股利權利與現金增資權利的價值總和,會與在除權除息日前一天賣出股票之價格相當,因此將除權除息日前一天收盤價扣除股東因參與除權除息可獲得之權利價值,即為除權除息日當天開盤價之理論值,此為除權息參考價之定義。事實上,臺灣證券交易所修改前所沿用之除權息參考價公式為錯誤的公式。本研究採比較除權除息日開盤價與正確/錯誤除權息參考價之差距、模型選取準則、迴歸參數係數檢定以及matching方法(Abadie and Imbens, 2012, 2016; Hirano et al., 2003; Khan and Tamer, 2010; Lenis et al., 2017)來比較正確與錯誤除權息參考價何者對股價具有較高之解釋力,對於金融管理相關法規制訂具有參考價值。<br> Abstract: During 1995-2007, the formula of the ex-dividend reference price adopted by the Taiwan Stock Exchange and the GreTai Securities Exchange, the two major stock exchanges in Taiwan, was inaccurate. The formula was not corrected until January 8, 2008. We plan to use this special situation to study how the inaccurate information published by the two exchanges affects the ex-date opening price. We intend to show that the inaccurate price (not the accurate one) is closer to and has higher explanatory power on the ex-date opening price before the formula was amended, consistent with the functional fixation hypothesis.除權息參考價員工分紅行為財務功能故著假說Ex-dividend reference priceemployee stock bonusbehavioral financefunctional fixation hypothesis「台大核心研究群」計畫【除權息參考價與定錨效應】