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American Economic Review Vol. 116 No. 7 2026

Market Opacity and Fragility: Why Liquidity Evaporates When It Is Most Needed

Giovanni Cespa1; Xavier Vives2

1 Bayes Business School, City St George's, University of London, and CEPR (email: ) · 2 IESE Business School (email: )

Abstract

Lack of market transparency can impair the liquidity provision of nonstandard liquidity suppliers and make liquidity demand increasing in illiquidity. This can yield strategic complementarities and induce multiple equilibria. Then an initial dearth of liquidity may degenerate into a liquidity rout (as in a “flash crash”), and traders faced with the largest cost of trading are those trading more intensely at equilibrium. An increase in order flow transparency and/or in the mass of dealers who are in the market at all times has a positive impact on total welfare.

DOI
10.1257/aer.20231613
Volume
116
Issue
7
Pages
2454-2503
Language
en
Sources
openalex crossref

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