On 25 March 2002, the Hong Kong Exchanges and Clearing Ltd (HKEx) introduced an opening call auction. This trading mechanism is designed to facilitate price discovery in the presence of asymmetric information at the market open, increasing opening price efficiency. The design of the HKEx differs significantly from opening auctions in other markets. Contrary to previous research, the results indicate a decrease in market quality following the introduction of the opening call auction. This decline is largest in the less actively traded stocks.
Review of Quantitative Finance and Accounting – Springer Journals
Published: Oct 23, 2007
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