本篇文章援引Easley and O’Hara (2002) 所完整建構出來的理論模型,探討台灣期貨市場的資訊交易機率。我們選取台灣十年期政府公債期貨為樣本，以兩個月為期間，在流動性考量下，納入日內資料的每筆交易，實証結果顯示，台灣十年期公債期貨市場資訊交易機率僅為0.23。我們將台灣公債期貨市場資訊交易機率低的原因歸因其缺乏流動性，並進一步就流動性低的原因提出解釋。

This paper follows Easley and O’Hara (2002) and estimates the probability of information-based trading in Taiwan Futures Market. We use the intraday data of 10-year Government Bond Futures in Taiwan Futures Exchange, including all transactions as trades in a trading day for liquidity. Our empirical result shows that the risk of information-based trading is quite low since the estimated probability of the information-based trading of 10-year Government Bond Futures is only 0.23. We attribute this result to the illiquidity of 10-year Government Bond Futures, and we provide several explanations for the illiquidity.

[1] David Easley and Maureen O'Hara, 1987, Price, trade size, and information in securities markets, Journal of Financial Economics 19, 69-90.
[2] David Easley, Nicholas M. Kiefer, Maureen O'Hara, 1997, One day in the life of a very common stock, The Review of Financial Studies, Vol. 10, No. 3, 805-835
[3] David Easley, Soeren Hvidkjaer, Maureen O'Hara, 2002,Is information risk a determinant of asset returns?”, The Journal of Finance, Vol. 57, No. 5, 2185-2221
[4] David Easley, Soeren Hvidkjaer, Maureen O'Hara, 2004, Factoring information into returns, Working paper, SSRN
[5] David Easley, Maureen O'Hara, P. S. Srinivas,1998, Option volume and stock prices: Evidence on where informed traders trade”, The Journal of Finance, Vol. 53, No. 2, 431-465
[6] David Easley, Nicholas M. Kiefer, Maureen O'Hara and Joseph B. Paperman, 1996, Liquidity, information, and infrequently traded stocks, The Journal of Finance, Vol. 51, No. 4, 1405-1436
[7] Albert S. Kyle, 1985, Continuous auctions and insider trading, Econometrica, Vol. 53, No. 6, 1315-1335
[8] Charles M. C. Lee and Mark J. Ready, 1991, Inferring trade direction from intraday data, The Journal of Finance, Vol. 46, No. 2, 733-746