Coordinated bubbles and crashes

In a market with information friction, investors strategically consider the actions of others and evolutionarily switch between fundamental and technical strategies to maximize their payoffs. The collective actions of all investors exert feedback on asset price, which affects investors’ subsequent actions. We find that investors have the incentive to adopt fundamental strategy to restore market efficiency only if the mispricing is sufficiently large. When investors fail to coordinate on the fundamental strategy, market inefficiency increases, which blows the bubble. As market inefficiency grows, the coordination on fundamental strategy strengthens, which eventually bursts the bubble. © 2020 Elsevier B.V. All rights reserved.