The Equity Risk Premium (ERP) is a measure of the extra return that investors require to hold risky stocks instead of safe government bonds. It’s usually expressed as an annual percentage, and it represents the amount of return that investors demand in order to compensate for the additional risk they take on by investing in stocks.Historically, the ERP has averaged about 5-6%. This means that over time, investors have earned an average return of 5-6% above what they could earn by investing in Treasury bills or other low-risk securities.There are a number of factors that can affect the ERP, including interest rates, inflation rates, and investor sentiment.For example, when interest rates are high, the ERP tends to be higher because investors need to be compensated for taking on more risk. And when confidence in the stock market is low, the ERP tends to be lower as well.