CAPM: A Time-Tested Investment Model for Modern Portfolios

This paper provides an in-depth exploration of the Capital Asset Pricing Model (CAPM), which is a pricing model that is an important part of financial theory. It will discuss the origins, assumptions and implications of the CAPM model in investment decisions and compares the pros and cons with other asset pricing models such as the single index model and the arbitrage pricing theory. The CAPM model has undergone significant evolution and adaptation over time through the recognition of its limitations and complexity of real-world markets as society developed at an increasing rate. Since CAPM was one of the first asset pricing model, it had room to be improved and have been critiqued, it laid the foundation for further developments such as the Fama-French Three-Factor Model which enhances the understanding of risk and returns. This paper aims to highlight the CAPM model’s theoretical foundations, its practical applications in the real world, and its role in evolving financial analysis and financial predictions.