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Price Impacts and Quote Adjustment on the Nasdaq and NYSE/AMEX

  • Jones, C.M.
  • Lipson, M.L.
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    We compare the price impact of trades across market structures by examining firms that switch exchanges. When firms are listed on Nasdaq, quoted prices adjust quite slowly to the information contained in order flow. On average, it takes about 5 minutes (or about 6 transactions) for half of the eventual price impact to be incorporated into quotes. In contrast, quotes in NYSE and AMEX firms adjust much more quickly, with half-lives around one transaction. This has important implications for measures of adverse selection or information content. Price impacts are likely to be severely downward biased (particularly on Nasdaq) if they are estimated using only the immediate quote response. For example, using immediate price impacts (e.g., the change in quotes prior to the next trade), Nasdaq price impacts are far smaller than NYSE price impacts (1 vs. 9 basis points). Using cumulative price impacts four hours later, the conclusions are different: price impacts average about 20 bps on both exchanges. In terms of methodology, quote adjustment is too slow to be explained solely by the Madhavan, Richardson, and Roomans (1997) model. For this reason, we model midpoint adjustment using both a VAR and a partial adjustment model. We also discuss possible explanations for this phenomenon.

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    Paper provided by Columbia - Graduate School of Business in its series Papers with number 99-8.

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    Length: 34 pages
    Date of creation: 1999
    Date of revision:
    Handle: RePEc:fth:colubu:99-8
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