Finace Investment . Efficient Diversification

DUY DAY  today 8p.m NEW YORK TIMES Intro You found the expected returns and variance-covariance matrix of returns for 3 stocks:           Amazon       Walmart          Exxon E(r)     36.9%           16.8%          4.5%                             Amazon       Walmart          Exxon   Amazon             0.36    Walmart            0.06                 0.16   Exxon                0.1

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