Statistical Approach
The empirical studies will be performed on two portfolios. First, we will have a portfolio consisting of 20 stocks based on an initial sorting on price-to-earnings and market-to-book ratios which is rebalanced yearly. The return of this portfolio will be compared to the return on the market index, the broad OMXSPI index which is a value weighted index that includes all the stocks listed on the Stockholm Stock Exchange. We will use a time series regression to see if the portfolio produces any significant positive alpha when we regress the excess portfolio return on the excess market return.