Market Model quick question!!

CFA Level II
#1

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.

#2

Return on the stock when the market return is zero.

#3

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

#4

^ Or the Alpha.