Large price changes on small scales

A. G. Zawadowski, J. Kertesz and G. Andor

Papers from arXiv.org

Abstract: In this study we examine the evolution of price, volume, and the bid-ask spread after extreme 15 minute intraday price changes on the NYSE and the NASDAQ. We find that due to strong behavioral trading there is an overreaction. Furthermore we find that volatility which increases sharply at the event decays according to a power law with an exponent of approximately 0.4, i.e., much faster than the autocorrelation function of volatility.

Date: 2004-01, Revised 2004-01
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