#Earnings $AA reports tonight. Below are details on earnings one-day moves over the last 12 quarters.

Oct. 17, 2018 AC +5.85%
July 18, 2018 AC -13.34% Biggest DOWN
April 18, 2018 AC +1.39%
Jan. 17, 2018 AC -7.00%
Nov. 17, 2017 AC -2.74%
Oct. 18, 2017 AC -2.53%
July 19, 2017 AC +0.60%
April 24, 2017 AC +9.54% Biggest UP
Jan. 24, 2017 AC -2.58%
Oct. 10, 2016 AC -11.42%
July 11, 2016 AC +5.42%
April 11, 2016 AC -2.66%

Avg (+ or -) 5.42%
Bias -1.62%, negative bias on earnings.

With stock at 28.20 the data suggests these ranges:
Based on current IV (expected move into Friday per TOS): 26.23 to 30.17
Based on AVERAGE move over last 12 quarters: 26.67 to 29.73
Based on MAXIMUM move over last 12 Q’s (13.3%): 24.44 to 31.96

Open for requests on other symbols.