Delta, United, and American Airlines announced purchases of planes on July 18 (7/18), February 12 (2/12), and October 7 (10/7), respectively. Delta United American MarketCompany Market Company MarketCompany Date Return Return Date Return Return Date Return Return 7/12 -38 -55 2/8 -.87 -1.14 10/1 .58 43 7/13 .00 .28 2/9 -97 -1.14 10/2 .48 .75 7/16 .85 1.06 2/10 48 .27 10/3 1.18 1.18 7/17 -.85 -68 2/11 .68 2.68 10/6 18 -1.99 7/18 -2.17 1.07 2/12 -38 -23 10/7 -2.28 -44 7/19 -.92 -.58 2/15 1.18 2.36 10/8 .58 .58 7/20 -97 -1.14 2/16 .58 .58 10/9 -38 -21 7/23 .78 .43 2/17 -38 -26 10/10 .38 7/24 .28 .15 2/18 .38 .13 10/13 .00 -18 - 21 Given the above information, calculate the cumulative abnormal return (CAR) for these stocks as a group. All of the stocks have a beta of 1 and no other announcements are made. (A negative answer should be indicated by a minus sign. Leave no cells blank - be certain to enter "O" wherever required. Do not round intermediate calculations and round your answers to 2 decimal places, e.g., 32.16.) Given the above information, calculate the cumulative abnormal return (CAR) for these stocks as a group. All of the stocks have a beta of 1 and no other announcements are made. (A negative answer should be indicated by a minus sign. Leave no cells blank - be certain to enter "0" wherever required. Do not round intermediate calculations and round your answers to 2 decimal places, e.g., 32.16.) Delta Abnormal returns (RI-RM) United American Days from announcement -4 Sum Average abnormal return Cumulative abnormal return -3 -2 -1 0 1 2 3 4