# Cost of Equity: Understand how to calculate Return on Investment in one sentence.
Want to know if buying this stock is worthwhile? The key lies in the **Return on Investment** — simply put, it's the minimum return rate you should expect from investing in this company.
# # Which of the two algorithms is better to use?
**CAPM (Capital Asset Pricing Model)** — Most commonly used
Formula: **Return = Risk-free return + β value × ( market return - Risk-free return )**
For example: the yield on government bonds is 2%, the market average yield is 8%, and the volatility of a certain stock is 1.5
View OriginalWant to know if buying this stock is worthwhile? The key lies in the **Return on Investment** — simply put, it's the minimum return rate you should expect from investing in this company.
# # Which of the two algorithms is better to use?
**CAPM (Capital Asset Pricing Model)** — Most commonly used
Formula: **Return = Risk-free return + β value × ( market return - Risk-free return )**
For example: the yield on government bonds is 2%, the market average yield is 8%, and the volatility of a certain stock is 1.5

