1 We are considering investing in three stocks. The random variable Si represents the value one year from now of $1 invested in stock i. We are given that E(S1)  1.15, E(S2) 

1.21, E(S3)  1.09; var S1  0.09, var S2  0.04, var S3 

0.01; cov(S1, S2) 0.006, cov(S1, S3) 0.004, and cov(S2, S3)  0.005. We have $100 to invest and want to have an expected return of at least 15% during the next year.

Formulate a QPP to find the portfolio of minimum variance that attains an expected return of at least 15%.