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"Frontmatter". In: Analysis of Financial Time Series

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<strong>Analysis</strong> <strong>of</strong> <strong>Financial</strong> <strong>Time</strong> <strong>Series</strong>. Ruey S. TsayCopyright © 2002 John Wiley & Sons, <strong>In</strong>c.ISBN: 0-471-41544-8CHAPTER 5High-Frequency Data <strong>Analysis</strong>and Market MicrostructureHigh-frequency data are observations taken at fine time intervals. <strong>In</strong> finance, they<strong>of</strong>ten mean observations taken daily or at a finer time scale. These data have becomeavailable primarily due to advances in data acquisition and processing techniques,and they have attracted much attention because they are important in empiricalstudy <strong>of</strong> market microstructure. The ultimate high-frequency data in finance are thetransaction-by-transaction or trade-by-trade data in security markets. Here time is<strong>of</strong>ten measured in seconds. The Trades and Quotes (TAQ) database <strong>of</strong> the New YorkStock Exchange (NYSE) contains all equity transactions reported on the ConsolidatedTape from 1992 to present, which includes transactions on NYSE, AMEX,NASDAQ, and the regional exchanges. The Berkeley Options Data Base providessimilar data for options transactions from August 1976 to December 1996. Transactionsdata for many other securities and markets, both domestic and foreign,are continuously collected and processed. Wood (2000) provides some historicalperspective <strong>of</strong> high-frequency financial study.High-frequency financial data are important in studying a variety <strong>of</strong> issues relatedto trading process and market microstructure. They can be used to compare the efficiency<strong>of</strong> different trading systems in price discovery (e.g., the open out-cry system<strong>of</strong> NYSE and the computer trading system <strong>of</strong> NASDAQ). They can also be used tostudy the dynamics <strong>of</strong> bid and ask quotes <strong>of</strong> a particular stock (e.g., Hasbrouck, 1999;Zhang, Russell, and Tsay, 2001b). <strong>In</strong> an order-driven stock market (e.g., the TaiwanStock Exchange), high-frequency data can be used to study the order dynamic and,more interesting, to investigate the question “who provides the market liquidity.”Cho, Russell, Tiao, and Tsay (2000) use intraday 5-minute returns <strong>of</strong> more than 340stocks traded in the Taiwan Stock Exchange to study the impact <strong>of</strong> daily stock pricelimits and find significant evidence <strong>of</strong> magnet effects toward the price ceiling.However, high-frequency data have some unique characteristics that do not appearin lower frequencies. <strong>Analysis</strong> <strong>of</strong> these data thus introduces new challenges to financialeconomists and statisticians. <strong>In</strong> this chapter, we study these special characteristics,consider methods for analyzing high-frequency data, and discuss implications175

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