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

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%
July 18, 2016 AC -0.17%
April 18, 2016 AC -5.59%

Avg (+ or -) 4.95%
Bias -1.15%, negative bias on earnings.

With stock at 144.00 the data suggests these ranges:
Based on current IV (expected move into Friday per TOS): 136.68 to 151.32
Based on AVERAGE move over last 12 quarters: 136.87 to 151.13
Based on MAXIMUM move over last 12 Q’s (8.9%): 131.24 to 156.76
Based on DOWN max only (-7.6%): 133.03

Open to requests for other symbols.