Competition, interlisting and market structure in options trading

Nabil Khoury, Stylianos Perrakis () and Marko Savor

Journal of Banking & Finance, 2011, vol. 35, issue 1, 104-117

Abstract: This paper applies a game theory approach to examine the effects of a market structure change in options trading from a monopoly to a Cournot-type oligopoly that occurred in two successive periods on the Montreal exchange. We analyze the intra-day behaviour of option bid-ask spreads and find that cross-listing has a differential impact on spreads, affecting quoted but not effective spreads under oligopoly. We also find that the impact of the change in structure on effective spreads comes mostly from an increase in limit orders and is consistent with a switch from Cournot to Bertrand-type strategic behaviour for such orders. We conclude that market structure effects within an options exchange are enough to realize most of the benefits of inter-market competition even in the context of market thinness.

Keywords: Contingent; claims; Market; microstructure; Interlisting; Oligopoly; games (search for similar items in EconPapers)
Date: 2011
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Persistent link: https://EconPapers.repec.org/RePEc:eee:jbfina:v:35:y:2011:i:1:p:104-117

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