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

July 17, 2019 AC +4.58%
April 16, 2019 AC -4.15%
Jan. 22, 2019 AC +8.46%
Oct. 16, 2018 AC -7.62% Biggest DOWN
July 18, 2018 AC +3.26%
April 17, 2018 AC -7.53%
Jan. 18, 2018 AC -3.99%
Oct. 17, 2017 AC +8.86% Biggest UP
July 18, 2017 AC -4.20%
April 18, 2017 AC -4.91%
Jan. 19, 2017 AC +2.24%
Oct. 17, 2016 AC -2.61%

Avg (+ or -) 5.20%
Bias -0.63%, slight negative bias on earnings.

With stock at 142.00 the data suggests these ranges:
Based on current IV (expected move into Friday per TOS): 135.06 to 148.94
Based on AVERAGE one-day move over last 12 quarters: 134.61 to 149.39
Based on MAXIMUM one-day move over last 12 Q’s (8.9%): 129.42 to 154.58
Based on DOWN max only (-7.6%): 131.18

Open to requests for other symbols.