Problem 4-04 A sophisticated investor, B. Graham, sold 400 shares short of Amwell, Inc. at $64 a share. The price of the stock subsequently fell to $52 before rising to $65 at which time Graham covered the position (that is, closed the short position). What was the percentage gain or loss on this investment? Use a minus sign to enter the amount as a negative value. Round your answer to two decimal places.