Abstract
This study examines intraday patterns of short sales, margin purchases, adverse selection, and bid–ask spreads in the order-driven market of the Taiwan Stock Exchange (TWSE). We find that both short sales and margin purchases exhibit a U-shaped intraday pattern in the TWSE. We further show that short sales and margin purchases have a significantly positive relationship with adverse selection and bid–ask spreads. We provide evidence that the U-shaped pattern of bid–ask spreads can be explained by short selling and margin trading activities.
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