How Effective are Trading Pauses?

49 Pages Posted: 9 Jul 2016 Last revised: 24 Apr 2017

See all articles by Nikolaus Hautsch

Nikolaus Hautsch

University of Vienna - Department of Statistics and Operations Research; Center for Financial Studies (CFS); Vienna Graduate School of Finance (VGSF)

Akos Horvath

Board of Governors of the Federal Reserve System

Date Written: April 2017

Abstract

Exploiting NASDAQ order book data and difference-in-differences methodology, we identify the distinct effects of trading pause mechanisms introduced on U.S. stock exchanges after May 2010. We show that the mere existence of such a regulation constitutes a safeguard which makes market participants behave differently in anticipation of a pause. Pauses tend to break local price trends, make liquidity suppliers revise positions, and enhance price discovery. In contrast, pauses do not have a "cool off" effect on markets, but rather accelerate volatility and bid-ask spreads. This implies a regulatory trade-off between the protective role of trading pauses and their adverse effects on market quality.

Keywords: trading pause, magnet effect, price discovery, volatility, liquidity

JEL Classification: G10, G14, G18

Suggested Citation

Hautsch, Nikolaus and Horvath, Akos, How Effective are Trading Pauses? (April 2017). Available at SSRN: https://ssrn.com/abstract=2806474

Nikolaus Hautsch

University of Vienna - Department of Statistics and Operations Research ( email )

Oskar-Morgenstern-Platz 1
Vienna, A-1090
Austria

Center for Financial Studies (CFS) ( email )

Grüneburgplatz 1
Frankfurt am Main, 60323
Germany

Vienna Graduate School of Finance (VGSF) ( email )

Welthandelsplatz 1
Vienna, 1020
Austria

Akos Horvath (Contact Author)

Board of Governors of the Federal Reserve System ( email )

20th Street and Constitution Avenue NW
Washington, DC 20551
United States

HOME PAGE: http://https://www.federalreserve.gov/econres/akos-horvath.htm

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