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

Nov. 7, 2019 AC +12.28%
Aug. 7, 2019 AC +27.46%
May 8, 2019 AC -55.75%
Feb. 21, 2019 AC -57.76% Biggest DOWN
Oct. 31, 2018 AC -9.74%
Aug. 1, 2018 AC +8.43%
May 3, 2018 AC +3.91%
Feb. 21, 2018 AC +11.00%
Nov. 2, 2017 AC -22.59%
Aug. 2, 2017 AC +35.88% Biggest UP
May 3, 2017 AC -0.40%
Feb. 23, 2017 AC -1.60%

Avg (+ or -) 20.57%
Bias -4.07%, negative bias on earnings.

With stock at 93.00 the data suggests these ranges:
Based on current IV (expected move into Friday per TOS): 72.11 to 113.89
Based on AVERAGE one-day move over last 12 quarters: 73.87 to 112.13
Based on MAXIMUM one-day move over last 12 Q’s (57.8%): 39.28 to 146.72
Based on UP max only (+35.9%): 126.37

Open to requests for other symbols.