You know what’s weird, the market premium is the slope for the security market line… you would think it would be the Beta
Nope, it isnt weird. The market premium is the slope because the SML has beta as the “independent variable”.
X-axys = beta Y-axys = E® E® = beta*MRP + RFR compare that to Y = mx + c m = slope c = intersept E® = m*beta + c hence m = intersept = RFR c = slope = MRP