时期
买入价
卖出价
收盘价
Mar-15
$58.50
$59.00
$58.75
Apr-15
$57.80
$58.00
$57.90
Q215
$57.00
$57.25
$57.13
Q315
$55.50
$56.25
$55.88
Q415
$54.75
$55.13
Q116
$54.48
$54.98
$54.73
Cal16
$54.00
$54.38
Cal17
$54.63
$54.88