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Did the ETF enhance arbitrage between cash and futures of the Nikkei225?

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  • Youki Kohsaka

    () (Graduate School of Economics, Osaka University)

Abstract

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 measure the degree of arbitrage by four indexes: 1) the frequency and 2) the size of the deviations from non-arbitrage condition, which reflects the magnitude of arbitrage opportunities, 3) the frequency of arbitrage transactions as a measures of the intensity of arbitrage activities and 4) the time during a deviation from non-arbitrage condition for an indicator of the achieved informational efficiency. I found that the frequency and the size of the deviations as well as the frequency of arbitrage transactions increased significantly. However, the deviation time did not change. These results suggest that while arbitrage opportunities increased, the intensified arbitrage activities balanced out it, resulting in the invariant time of deviation.

Suggested Citation

  • Youki Kohsaka, 2009. "Did the ETF enhance arbitrage between cash and futures of the Nikkei225?," Discussion Papers in Economics and Business 09-20, Osaka University, Graduate School of Economics and Osaka School of International Public Policy (OSIPP).
  • Handle: RePEc:osk:wpaper:0920
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    File URL: http://www2.econ.osaka-u.ac.jp/library/global/dp/0920.pdf
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    More about this item

    Keywords

    ETF(Exchange-Traded Funds); Arbitrage Relationship; Arbitrage Activity;

    JEL classification:

    • G13 - Financial Economics - - General Financial Markets - - - Contingent Pricing; Futures Pricing
    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading

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