What is the formula that determines the total risk rate of any stock?

The total risk rate of a stock is typically assessed using the Capital Asset Pricing Model (CAPM), represented by the formula: ( \text{Expected Return} = R_f + \beta (R_m - R_f) ). Here, ( R_f ) is the risk-free rate, ( \beta ) measures the stock's volatility relative to the market, and ( R_m ) is the expected market return. Total risk encompasses both systematic risk (market risk) and unsystematic risk (specific to the stock), but CAPM primarily focuses on systematic risk. Thus, understanding both components is essential for a comprehensive risk assessment.