Four stocks which have the following characteristics are used to construct a portfolio: Stocks Number Market Expected Standard Beta of shares prices return deviation HSBC 100 70 5% 4% 1.10 CLP 100 60 60 5% 4% 0.80 SINOPEC 1000 7 6% 5% 1.30 China Mobile 100 80 80 6% 5% 1.05