#Earnings $COST reports tonight. Below are details on earnings 1-day moves over the last 12 quarters.

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% Biggest DOWN
May 25, 2017 AC 1.79%
March 2, 2017 AC -4.33%
Dec. 7, 2016 AC 2.43%
Sept. 29, 2016 AC 3.40%
May 25, 2016 AC 3.57% Biggest UP
March 2, 2016 AC -0.77%
Dec. 8, 2015 AC -5.41%

Avg (+ or -) 3.17%
Bias -0.75%, slight negative bias on earnings.

With stock at 229.00 the data suggests these ranges.
Based on current IV (expected move per TOS): 220.17 to 237.83
Based on AVERAGE move over last 12 quarters: 221.75 to 236.25
Based on MAXIMUM move over last 12 Q’s (6.0%): 215.33 to 242.67

Open for requests on other symbols.