Suppose That the Standard Deviation of Monthly Changes in the Price

Short Answer

Suppose that the standard deviation of monthly changes in the price of commodity A is $2. The standard deviation of monthly changes in a futures price for a contract on commodity B which is similar to commodity A) is $3. The correlation between the futures price and the commodity price is 0.9. What hedge ratio should be used when hedging a one-month exposure to the price of commodity A? _ _ _ _ _ _