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After finding " Efficient Market Hypothesis " and " Capital Asset Pricing Model " each other, these two important theories became the most attractive research field and affect the foll- owing theories very much. But after being discovered anomalies embedded in stock mark- et by empiricists , these two important theories encountered severe critique . if there is any anomalies existed in stock market , We cannot help suspecting the market efficiency . The principal objective of this paper is whether the various anom- alies exist in Taiwan''''''''s stock market or not. this paper empirically studies the various anomalies in Tai- wan''''''''s stock market and finds two conclusions as follows: 1.The various anomalies do not exist in Taiwan''''''''s stock market 2.Different estimation methodologies can''''''''t lead to different conclusions about the various anomalies.
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