Risk premium is an important factor for different models that estimate the shareholders equity. the debt cost used to evaluate both the financial assets as well as investment projects. The paper presents a brief history of the risk premium. the main estimation methods together with the influence factors. https://www.ealisboa.com/quick-buy-Acer-shirasawanum-Green-Snowflake-Weeping-Full-Moon-Japanese-Maple-great-pick/