Problem 14-1 Cumulative Abnormal Returns 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 Market Company Market Company Market Company Date Return Return Date Return Return Date Return Return 7/12 -.39 -.57 2/8 -.88 -1.16 10/1 .59 .42 7/13 .00 .29 2/9 -.98 -1.16 10/2 .49 .77 7/16 .92 1.15 2/10 .49 .26 10/3 1.19 1.19 7/17 -.92 -.73 2/11 .69 2.83 10/6 .19 -2.14 7/18 -2.18 1.08 2/12 -.39 -.22 10/7 -2.29 -.43 7/19 -.93 -.57 2/15 1.19 2.45 10/8 .59 .59 7/20 -.98 -1.17 2/16 .59 .59 10/9 -.39 -.20 7/23 .79 .42 2/17 -.39 -.25 10/10 .39 -.20 7/24 .29 .14 2/18 .39 .12 10/13 .00 -.19 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.) Days from announcement Abnormal returns (Ri - RM) Average abnormal Delta United American Sum return Cumulative abnormal return -4 -3 -2 -1 0 1 2 3 4

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Problem 14-1 Cumulative Abnormal Returns
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
Market Company
Market Company
Market Company
Date
Return Return
Date
Return Return
Date
Return
Return
7/12
-.39
-.57
2/8
-.88
-1.16
10/1
.59
.42
7/13
.00
.29
2/9
-.98
-1.16
10/2
.49
77
7/16
.92
1.15
2/10
.49
.26
10/3
1.19
1.19
7/17
-.92
-.73
2/11
.69
2.83
10/6
.19
-2.14
7/18
-2.18
1.08
2/12
-.39
-.22
10/7
-2.29
-.43
7/19
-.93
-.57
2/15
1.19
2.45
10/8
.59
.59
7/20
-.98
-1.17
2/16
59
.59
10/9
-.39
-.20
7/23
.79
.42
2/17
-.39
-.25
10/10
.39
-.20
7/24
.29
.14
2/18
.39
.12
10/13
.00
-.19
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.)
Abnormal returns (Ri - RM)
Days from
announcement
Average abnormal
Delta
United
American
Sum
return
-4
-3
-2
-1
0
1
2
3
4
Cumulative
abnormal return
Transcribed Image Text:Problem 14-1 Cumulative Abnormal Returns 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 Market Company Market Company Market Company Date Return Return Date Return Return Date Return Return 7/12 -.39 -.57 2/8 -.88 -1.16 10/1 .59 .42 7/13 .00 .29 2/9 -.98 -1.16 10/2 .49 77 7/16 .92 1.15 2/10 .49 .26 10/3 1.19 1.19 7/17 -.92 -.73 2/11 .69 2.83 10/6 .19 -2.14 7/18 -2.18 1.08 2/12 -.39 -.22 10/7 -2.29 -.43 7/19 -.93 -.57 2/15 1.19 2.45 10/8 .59 .59 7/20 -.98 -1.17 2/16 59 .59 10/9 -.39 -.20 7/23 .79 .42 2/17 -.39 -.25 10/10 .39 -.20 7/24 .29 .14 2/18 .39 .12 10/13 .00 -.19 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.) Abnormal returns (Ri - RM) Days from announcement Average abnormal Delta United American Sum return -4 -3 -2 -1 0 1 2 3 4 Cumulative abnormal return
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