Multiple Linear Regression 01 – Portfolio monthly excess returns

You are a financial analyst at an investment firm. Your manager asks you to analyze the performance drivers for one of the firm’s portfolios. He asks you to construct a regression model of the portfolio’s monthly excess returns (RET) against three factors: the market excess return (MRKT), a size factor (SMB), and the monthly percentage change in a bond index (BOND).

You collect the data and run the regression, and the resulting model is:

YRET = -1.099 + 1.917XMRKT + 0.589XSMB + 0.047XBOND.

You then create some diagnostic charts to help determine the model fit.