Discussion Paper No.10 How Fast Do Tokyo and New York Stock Exchanges Respond to Each Other?: An Analysis with High-Frequency Data Yoshiro Tsutsui and Kenjiro Hirayama October 2008 GCOE Secretariat Graduate School of Economics OSAKA UNIVERSITY 1-7 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan How Fast Do Tokyo and New York Stock Exchanges Respond * to Each Other?: An Analysis with High-Frequency Data Yoshiro Tsutsui Osaka University Kenjiro Hirayama Kwansei Gakuin University Abstract This paper uses one-minute returns on the TOPIX and S&P500 to examine the efficiency of the Tokyo and New York Stock Exchanges. Our major finding is that Tokyo completes reactions to New York within six minutes, but New York reacts within fourteen minutes. Dividing the sample period into three subperiods, we found that the response time has shortened and the magnitude of reaction has become larger over the period in both markets. The magnitude of response in New York to a fall in Tokyo is roughly double that of a rise. JEL Classification Numbers: G14, G15, F36 Keywords: international linkage, stock prices, market efficiency, high frequency data Correspondence: Yoshiro Tsutsui Kenjiro Hirayama Graduate School of Economics School of Economics Osaka University Kwansei Gakuin University 1-7 Machikane-yama, Toyonaka Uegahara, Nishinomiya-shi 560-0043 Japan 662-8051 Japan Phone: +81-6-6850-5223 Phone: +81-798-54-6438 Fax: +81-6-6850-5274 Fax: +81-798-54-6438 e-mail:
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[email protected] * We are especially grateful to the anonymous referee of this journal for many constructive comments which led to substantial improvements.