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Why Do Markets Crash? Bitcoin Data Offers Unprecedented Insights
Jonathan Donier1, Jean-Philippe Bouchaud2
1Capital Fund Management, 23-25 Rue de l'Université, 75007 Paris, France; Laboratoire de Probabilités et Modèles Aléatoires, Université Pierre et Marie Curie (Paris 6), 4 Place Jussieu, 75005 Paris, France; Ecole des Mines ParisTech, 60 Boulevard Saint-Michel, 75006 Paris, France.
Plos One
|October 9, 2015
Summary
Financial market crashes are linked to liquidity, not just news. A new measure helps predict liquidity risk and market instability, offering early warning signs of potential crashes.
Area of Science:
- Financial Economics
- Market Dynamics
- Quantitative Finance
Background:
- Efficient market theory posits crashes stem from fundamental valuation changes.
- Empirical evidence suggests crashes arise from endogenous feedback loops, not solely news.
- Clear empirical evidence for feedback loop-driven crashes remains elusive.
Purpose of the Study:
- To investigate the role of market liquidity in financial market crashes.
- To propose a novel, publicly-informed measure of market liquidity.
- To explore the potential for dynamic liquidity risk evaluation and early warning systems.
Main Methods:
- Developed a new market liquidity measure inspired by market impact theories.
- Utilized readily available, public information for liquidity assessment.
- Empirical analysis linking liquidity to market crash phenomena.
Main Results:
- Demonstrated that market crashes are conditioned by market liquidity.
- Introduced a quantifiable measure for market liquidity.
- Identified a potential link between liquidity dynamics and market instabilities.
Conclusions:
- Market liquidity is a critical factor in understanding financial crashes.
- The proposed liquidity measure enables dynamic risk assessment.
- Findings pave the way for quantitative models of crash mechanisms and early warnings.
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