Automation, speed, and stock market quality: The NYSE's Hybrid |
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| Authors: | Terrence Hendershott Pamela C. Moulton |
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| Affiliation: | aHaas School of Business, University of California, 545 Student Services Building #1900, Berkeley, CA 94720, USA;bSchool of Hotel Administration, Cornell University, 435A Statler Hall, Ithaca, NY 14853, USA |
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| Abstract: | Automation and trading speed are increasingly important aspects of competition among financial markets. Yet we know little about how changing a market's automation and speed affects the cost of immediacy and price discovery, two key dimensions of market quality. At the end of 2006 the New York Stock Exchange introduced its Hybrid Market, increasing automation and reducing the execution time for market orders from 10 seconds to less than one second. We find that the change raises the cost of immediacy (bid-ask spreads) because of increased adverse selection and reduces the noise in prices, making prices more efficient. |
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| Keywords: | JEL classification: G12 G14 |
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