Problem
To better understand the risk of investing in Channel 7, you estimate the company's equity betas to get a rough idea of its systematic risk. You are required to calculate the equity beta by obtaining the market index data and using an ordinary least squares (OLS) regression under the Capital Asset Pricing Model (CAPM). State how you would expect Channel 7's return to vary with changes in the market.
Explain & justify your methodology, including: how key variables were measured, your historical time horizon, your measurement intervals, selection of an appropriate market index, and the risk-free rate.