A security analyst has regressed the monthly returns on Berkshire Hathaway equity shares over the past five

Question:

A security analyst has regressed the monthly returns on Berkshire Hathaway equity shares over the past five years against those on the Standard & Poor’s 500 stock index over the same period. The resulting regression equation is r BH = 0.04 + 0.72 rSP. Use this equation and any other information you deem appropriate to estimate Berkshire Hathaway’s equity beta.