Tick Size and Informed Trading: Evidence from the Taiwanese Stock Market

Chang-Wen Duan, Ken Hung and Shinhua Liu

International Business Research, 2022, vol. 15, issue 1, 1

Abstract: We adopt the Sandås model for order-book equilibrium to examine informed trading on the Taiwanese stock market, a purely order-driven call-auction market. We find that adverse-selection cost is low for well-known stocks with high liquidity and low volatility, but cost is high for monitoring the order books of those stocks. Our empirical results show that the impact of adverse selection is greatest at the beginning of each trading day and that informed traders engage in stealth trading, supporting the stealth trading hypothesis. Finally, with the special tick size rules on the market, both adverse-selection cost and monitoring cost decline as tick size decreases.

Date: 2022
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