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Title: Market capitalization and efficiency. Does it matter? Evidence from the Athens Stock Exchange
Authors: Panagiotidis, Theodore
Keywords: Non-linearity
Market efficiency
Random walk
GARCH
Issue Date: 11-Feb-2004
Abstract: The efficient market hypothesis (EMH) is tested in the case of the Athens Stock Exchange (ASE) after the introduction of the euro for three different indices. The underlying assumption is that stock prices would be more transparent; their performance easier to compare; the exchange rate risk eliminated and as a result we expect the new currency to strengthen the argument in favour of the EMH. The FTSE/ASE 20, which consists of “high capitalisation” companies, the FTSE/ASE Mid 40, which consists of medium sized companies and the FTSE/ASE SmallCap, which covers the next 80 companies, are used. Five statistical tests are employed to test the residuals of the random walk model: the BDS, McLeod-Li, Engle LM, Tsay and Bicovariance test. Bootstrap as well as asymptotic values of these tests are estimated. The random walk hypothesis is rejected in all three cases and alternative GARCH models are estimated.
Description: Economics Research Paper, no. 04-05
URI: https://dspace.lboro.ac.uk/2134/321
Appears in Collections:Working Papers (Economics)

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