Ross Co., Westerfield, Inc., and Jordan Company announced a new agreement to market their respective products in China on July 18 (7/18). February 12 (2/12), and October 7(10/7), respectively. Given the information below, calculate the cumulative abnormal return (CAR) for these stocks as a group. Assume all companies have an expected return equal to the market retum. (A negative value should be indicoted by a minus sign. Leave no cells blank-be certain to enter " 0 " wherever required. Do not round intermediate colculations. Round your onswers to 1 decimal place.) Ross Co. Westerfield, Inc, and Jordan Company announced a new agreement to market their respective products in China on July 18 (7/18). February 12(2/12), and October 7 (10/7), respectively. Given the information below, calculate the cumulative abnormal return (CAR) for these stocks as a group. Assume all companies have an expected return equal to the market return. (A negative value should be indicated by a minus sign. Leave no cells blank - be certain to enter " 0 " wherever required. Do not round intermediate calculotions. Round your answers to 1 decimal place.)