#Earnings $GRUB reports tomorrow morning. Below are details on earnings one-day moves over the last 12 quarters.

Feb. 7, 2019 BO -2.00%
Oct. 25, 2018 BO -11.98%
July 25, 2018 BO +23.53%
May 1, 2018 BO -8.39%
Feb. 8, 2018 BO +27.36% Biggest UP
Oct. 25, 2017 BO +11.17%
Aug. 3, 2017 AC +9.05%
April 27, 2017 BO +22.55%
Feb. 8, 2017 BO -3.51%
Oct. 26, 2016 BO -12.69% Biggest DOWN
July 28, 2016 BO +24.10%
May 3, 2016 BO -7.12%

Avg (+ or -) 13.62%
Bias 6.01%, very positive bias on earnings.

With stock at 79.00 the data suggests these ranges:
Based on current IV (expected move into Friday per TOS): 68.90 to 89.10
Based on AVERAGE one-day move over last 12 quarters: 68.24 to 89.76
Based on MAXIMUM one-day move over last 12 Q’s (27.4%): 57.39 to 100.61
Based on DOWN max only (-12.7%): 68.97

Open to requests for other symbols.