This paper examines whether the stock split bubble in Japan burst by not only reformed system, but also Livedoor-shock. It is difficult to identify the effects of the both events, because they occurred in the same month (January, 2006). Thus, I identify both effects by dividing the samples into...

This paper introduces probability which represents symmetry transaction pattern into Roll [1984] and shows that the second autocorrelation for stockfs return is not necessarily zero. Glosten/Harris [1988] considers trader who symmetrically trades as information trader. Then I examine the...

This paper examines how the informational efficiency of the Japanese stock markets changed with the introduction of ETFs(Exchange-Traded Funds) by looking at the arbitrage relationships between cash and futures of the Nikkei225. This paper is unique in that it uses tick data, which enable me to...

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