Big Data and AI

  In the ever-evolving world of finance, no single theory can perfectly explain the complex behavior of asset prices. While the Capital Asset Pricing Model (CAPM) has long been the standard tool for assessing risk and return, it is based on strict assumptions that do not always hold in real markets. Enter the Arbitrage Pricing Theory (APT) —a more flexible, intuitive, and arguably more realistic alternative. Developed by Stephen Ross in 1976 , the APT provides a multifactor approach to asset pricing, emphasizing how various macroeconomic forces influence the returns of financial assets. It is a powerful tool that allows investors to capture multiple sources of risk , beyond just market movements.  What Is Arbitrage Pricing Theory (APT)? APT is an asset pricing model that relates the expected return of a security to various systematic risk factors , rather than just a single market factor (as in CAPM). It is grounded in the idea that if two portfolios offer the same ex...