What would be the risk of a portfolio of three assets that includes COST, SNE and UAA if I distribute a third of my capital to the three?

Covariance:

TABLA 3 - Covarianza TWTR SNE COST AMZN UAA INTC TWTR SNE INTC 0.00405264 -0.00169037 1.8238E-05 0.00033974 0.00061934 0.00242492 COST AMZN 0.02370906 0.00227366 0.00071109 0.00161778 0.00592778 0.00525934 0.00076766 0.00268923 0.002732 0.00233852 0.00230187 0.00071546 0.00599863 0.00370835 UAA 0.0130447