Does capitalization size affect the pricing of over-trading stocks?

Abstract

[[abstract]]本研究是以探討投資人因過度自信行為造成股價過度交易現象,股票價格被推升上來,在出現主升段訊號就先買進,然後股價會因市場量比價先行,漲波段後會盤整拉回,觀察確定後再買進,股票會呈現持續走揚趨勢,本論文在研究這段期間是否股本越小者,其股票投資組合報酬率會越大,股本越大者,其股票投資組合報酬率相對較小,本文以臺灣股票上市、上櫃公司為研究樣本,研究期間為2015年4月01日至2017年1月31日,研究結果顯示,平均累積異常報酬率最高落在股本規模次高(30億-100億)的區間,平均累積異常報酬率第二高的才是落在小股本(5億-10億)區間,但並非股本規模最小的(5億以下)報酬率是最高的,其中原因,股本規模最小之個股,容易被操作,演變正常投資行為產生不正常操作結果。[[abstract]]Thispaperstudieshowinvestors’overconfidenceaffectstheirover-tradingbehaviorandthusstockreturnsanomaly.Themainpurposeofthispaperistotestwhethersmall(large)capstocksexperiencehigher(lower)stockreturnsinthefuture.UsingasampleofTWSE-andOTC-listedstocksinTaiwanfromApril2015toJanuary2017,wefindnoevidencethatthesmallest-capstocks(cap<0.5NTbillions)experiencethehigheststockreturnsinthefuture.Instead,themediumcapstocks(3NTbillions)experiencethehigheststockreturnsinthefuture.Instead,themedium-capstocks(3NTbillions<cap<10NT$billions)experiencethehigheststockreturnsinthefuture.Thesefindingssupportthehypothesisthatthesmallest-capstocksaremorelikelytobemanipulated,whichinturnleadstoareturnsanomaly

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Last time updated on 12/02/2018

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