Market Model quick question!!

So APT the intercept term is the risk free rate. How about the market model? What is the intercept term? Is it also the risk free rate? E(Rp)= a + B(ERm) variance = beta^2 variance of market + variance of firm specific risk Covij= (Beta of i) x (beta of j) variance of market.

Return on the stock when the market return is zero.

thanks i thought so…but wasn’t too sure.

^ Or the Alpha.