What is 'Market Risk Premium'
The difference between the expected return on a market portfolio and the riskfree rate. Market risk premium is equal to the slope of the security market line (SML), a capital asset pricing model. Three distinct concepts are part of market risk premium:
1) Required market risk premium: the return of a portfolio over the riskfree rate (such as that of treasury bonds) required by an investor;
2) Historical market risk premium: the historical differential return of the market over treasury bonds; and
3) Expected market risk premium: the expected differential return of the market over treasury bonds.
Also called equity premium, market premium and risk premium.
BREAKING DOWN 'Market Risk Premium'
The historical market risk premium will be the same for all investors since the value is based on what actually happened. The required and expected market premiums, however, will differ from investor to investor based on risk tolerance and investing styles. The market risk premium can be calculated as follows:
Market Risk Premium = Expected Return of the Market – RiskFree Rate
The expected return of the market can be based on the S&P 500, for example, while the riskfree rate is often based on the current returns of treasury bonds.

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What is the historical market risk premium?
Learn what the historical market risk premium is and the different figures that result from an analyst's choice of calculations ... Read Answer >> 
Is market risk premium the same for all investors and investments?
Learn about how market risk premiums are determined, how they are calculated, why some assets require higher premiums and ... Read Answer >> 
Is the market risk premium the same for stocks and bonds?
Take a look at historical equity risk premium and credit spreads in the United States, which suggest that equities carry ... Read Answer >> 
How is the expected market return determined when calculating market risk premium?
Find out how the expected market return rate is determined when calculating market risk premium and how these figures are ... Read Answer >> 
How accurate is the equity risk premium in evaluating a stock?
Learn about the drawbacks of using the equity risk premium to evaluate a stock, and understand how it is calculated using ... Read Answer >> 
What is the correlation between equity risk premium and risk?
Learn about the relationship between the riskfree rate of return and the equity risk premium, and understand how the riskfree ... Read Answer >>