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

Dec. 12, 2019 AC -1.83%
Oct. 3, 2019 AC +0.92%
May 30, 2019 AC -0.81%
March 7, 2019 AC +5.08% Biggest UP
Dec. 13, 2018 AC -8.58% Biggest DOWN
Oct. 4, 2018 AC -5.55%
May 31, 2018 AC -0.55%
March 7, 2018 AC -0.89%
Dec. 14, 2017 AC +3.32%
Oct. 5, 2017 AC -5.97%
May 25, 2017 AC +1.79%
March 2, 2017 AC -4.33%

Avg (+ or -) 3.30%
Bias -1.45%, negative bias on earnings.

With stock at 317.50 the data suggests these ranges:
Based on current IV (expected move into Friday per TOS): 303.56 to 331.44
Based on AVERAGE one-day move over last 12 quarters: 307.02 to 327.98
Based on MAXIMUM one-day move over last 12 Q’s (8.6%): 290.26 to 344.74
Based on UP max only (+5.1%): 333.63

Open to requests for other symbols.