In December $2027.$ Ron offered his father to help him in creating and managing his new portfolio. After a lot of research, Ron presented his father with the following information about two security portfolios, a stock and a bond portfolio.

$\backslash$table$[[$State of the economy,Probability,Stock $"$S$",$Bond $"$B$"],[$Depression$,10\%,-10\%,-1\%$