I develop a model that connects market states and momentum. The model analyzes asset pricing implications of two well-known psychological biases, overconfidence and self-attribution bias, in a setting of multiple risky assets whose payoffs contain a common factor. Due to self-attribution bias,...

We study the effect of ambiguity on the formation of bubbles and on the occurrence of crashes in experimental asset markets à la Smith, Suchanek, and Williams (1988). We extend their framework to an environment where the fundamental value of the asset is ambiguous. We show that, when the...

We analyze a manager's optimal disclosure policy in a market in which some traders are confirmation-biased and ignore information inconsistent with their priors. The disclosed signal informs traders about the manager's unknown ability. By exerting costly effort, the manager can increase the...

We study information aggregation in a dynamic trading model with partially informed and ambiguity averse traders. We show theoretically that separable securities, introduced by Ostrovsky (2012) in the context of Subjective Expected Utility, no longer aggregate information if some traders have...

We study the effects of the investment horizon on asset price volatility using a Learning to Forecast experiment. We end that, for short investment horizons, participants coordinate on self-fulfilling trend extrapolating predictions. Price deviations are then reinforced and amplified, possibly...

We show that cryptocurrency markets are plagued by pump-and-dump manipulation, with at least 355 cases in seven months. Unlike stock market manipulators, cryptocurrency manipulators openly declare their intentions to pump specific coins, rather than trying to deceive investors. Puzzlingly,...

Expectation anchors are price levels that traders use as indications of whether the market is over- or under-priced. I develop the theory behind this well-documented behavioral notion, leading to the class of periodic demand functions. With a large number of heterogeneous agents, prices become...

Prior research documents capital market benefits of increased investor attention to accounting disclosures and media coverage; however, little is known about how investors and markets respond to attention‐grabbing events that reveal little nonpublic information. We use daily firm advertising...

Disagreement can affect the relation between private information and liquidity. In a model in which trading is entirely generated by disagreement stemming from overconfident interpretation of private signals, private information increases trading and enhances liquidity. In a more general version...

Do illegal insiders internalize legal risk? We address this question with hand-collected data from530 SEC investigations. Using two plausibly exogenous shocks to expected penalties, we showthat insiders trade less aggressively and earlier and concentrate on tips of greater value whenfacing...