What is Fama And French Three Factor Model?

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The Fama and French Three-Factor Model is an asset pricing model developed in 1992 that expands on the capital asset pricing model (CAPM) by adding size risk and value risk factors to the market risk factor in CAPM. This model considers the fact that value and small-cap stocks outperform markets on a regular basis. By including these two additional factors, the model adjusts for this outperforming tendency, which is thought to make it a better tool for evaluating manager performance.

Definition

The Fama-French Three-Factor Model is an asset pricing model introduced in 1992. It builds on the Capital Asset Pricing Model (CAPM) by adding size risk and value risk factors. The model accounts for the fact that value stocks and small-cap stocks often perform well in the market. By including these two additional factors, the model adjusts for this tendency and is considered a better tool for evaluating manager performance.

Origin

The Fama-French Three-Factor Model was proposed by Eugene Fama and Kenneth French in 1992. The model was developed to improve upon the CAPM, which only considers the market risk factor. Fama and French, through empirical research, found that size and value factors significantly impact stock returns, thus incorporating them into the model.

Categories and Features

The Fama-French Three-Factor Model includes three main factors: the market risk factor, the size factor, and the value factor. The market risk factor is the same as in CAPM, reflecting the overall market volatility. The size factor (SMB) considers that small-cap stocks typically have higher returns than large-cap stocks. The value factor (HML) reflects that value stocks (high book-to-market ratio) generally outperform growth stocks (low book-to-market ratio). The model's advantage lies in better explaining the variability of stock returns, but it also increases the model's complexity.

Case Studies

A typical case is the performance of small-cap stocks in the early 2000s. Many small-cap companies performed well after the dot-com bubble burst, and the Fama-French model could explain this phenomenon because it considers the size factor. Another case is the recovery performance of value stocks after the 2008 financial crisis. Value stocks rebounded quickly after the crisis, and the Fama-French model explained this through the value factor.

Common Issues

Common issues investors face when applying the Fama-French Three-Factor Model include accurately estimating the size and value factors and the stability of these factors under different market conditions. Additionally, the model's complexity may lead to overfitting issues, so investors need to use it cautiously.

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