Price Functionals with Bid-Ask Spreads: An Axiomatic Approach

Elyès Jouini ()

New York University, Leonard N. Stern School Finance Department Working Paper Seires from New York University, Leonard N. Stern School of Business-

Abstract: In Jouini and Kallal (1995a), the authors characterized the absence of arbitrage opportunities for contingent claims with cash delivery in the presence of bid-ask spreads. Other authors obtained similar results for a more general definition of the contingent claims but assuming some specific price processes and transaction costs rather than bid-ask spreads in general see for instance, Cvitanic and Karatzas, 1996). The main difference consists in the fact that the bid-ask ratio is constant in this last reference. This assumption does not permit to encompass situations where the prices are determined by the buying and selling limit orders or by a (resp. competitive) specialist (resp. market-makers). We derive in this paper some implications from the no-arbitrage assumption on the price functionals that generalizes all the previous results in a very general setting. Indeed, under some minimal assumptions on the price functional, we prove that the prices of the contingent claims are necessarily in some minimal interval. This result opens the way to many empirical analyses.

Date: 1999-05
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Related works:
Journal Article: Price functionals with bid-ask spreads: an axiomatic approach (2000)
Working Paper: Price functionals with bid–ask spreads: an axiomatic approach (2000)
Working Paper: Price Functionals with Bid-Ask Spreads: An Axiomatic Approach (1997)
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