Traditional finance theories like Modern Portfolio Theory (MPT) assume that investors are perfectly rational and risk-averse, aiming to maximize utility by optimizing expected returns and variance. However, decades of research in behavioral finance have shown that investors often deviate from purely rational behavior. Behavioral Portfolio Theory (BPT) , introduced by Shefrin and Statman in 2000, offers a fresh perspective by integrating psychological and emotional factors into portfolio construction. What is Behavioral Portfolio Theory? Behavioral Portfolio Theory suggests that investors mentally segment their wealth into multiple “mental accounts” or layers, each with distinct goals, risk preferences, and expectations. Unlike MPT's single-layer approach focusing on an overall risk-return tradeoff, BPT models the portfolio as a layered pyramid , where each layer reflects different investor aspirations. For example: The bottom layer prioritizes capital preservation and safe...
Practical training for data analysts and rational investors. Guides on SQL, data analysis, ETL, and personal finance to make data-driven decisions.