This text investigates the core question of why financial markets frequently deviate from the predictions of the efficient market hypothesis. Andrei Shleifer, a prominent economist, utilizes a framework grounded in psychological insights and arbitrage constraints to explain market anomalies. The book argues that limits to arbitrage and investor sentiment are primary drivers of market inefficiency, challenging the traditional view of rational market participants.

Experts frequently cite this work as a foundational text for understanding the intersection of psychology and finance. Readers often note the academic density of the prose, which requires a solid background in economic theory to fully grasp the presented models.