Although the efficient market hypothesis (EMH) is the leading theory describing the behavior of financial markets, researchers have increasingly questioned its efficacy since the 1980s because of its inconsistencies with empirical evidence. This challenge to EMH has resulted in the development...

The term “financial psychopath” was coined after the financial crisis of 2007−2008. Intended as a term of derision, the media used it to negatively label financial professionals, rather than to draw a clinical profile. The expression succinctly conveys the widespread post−2008 public...

This chapter discusses the role of speculation in the financial markets that influences individual and group behavior in the form of bubbles and crashes. The chapter highlights behavioral finance issues associated with bubbles, such as overconfidence, herding, group polarization, group-think...

The present paper studies the influence of institutions upon the risk incurred in alternative capital markets, in the lines of the old institutional school of economics. A game-theoretic model is introduced, presenting the alternative capital markets as Harsanyi's games with imperfect...

Standard or traditional finance research is based on the rational choice model that assumes market participants are fully rational, unbiased, emotionless, self-interested maximizers of expected utility. Recent research in behavioral finance recognizes that real-world investors and managers are...

This note is based on a recent confidence index introduced in the context of compensating probability factors for deviations of subjective probability measures from equivalent martingale measures. The index is adjusted for loss gain probability spreads, and it explains momentum in confidence. We...

This paper sets up an experimental asset market in the laboratory to investigate the effects of ambiguity on price formation and trading behavior in financial markets. The obtained trading data is used to analyze the effect of ambiguity on various market outcomes (the price level, volatility,...

This paper discusses the efficient market hypothesis and behavioral finance under a general framework using the literature of decision theories and information sciences. The focus is centered on the broad de nition of subjective rationality, the imprecision, and reliability of information. The...

The paper investigates the relation between the risk preferences of traders and the information aggregation properties of an experimental call market. We find evidence inconsistent with the prediction that market-clearing prices are closer to the full revelation of the state when traders are...