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

Jan. 24, 2019 AC +3.62%
Nov. 1, 2018 AC +9.70% Biggest UP
July 26, 2018 AC +1.36%
April 26, 2018 AC -1.71%
Jan. 25, 2018 AC -4.22%
Nov. 2, 2017 AC +2.11%
July 27, 2017 AC -9.24% Biggest DOWN
April 27, 2017 AC -2.02%
Jan. 26, 2017 AC -4.00%
Nov. 3, 2016 AC +1.89%
July 21, 2016 AC +0.52%
April 21, 2016 AC -4.88%

Avg (+ or -) 3.77%
Bias -0.57%, Slight negative bias on earnings.

With stock at 76.75 the data suggests these ranges:
Based on current IV (expected move into Friday per TOS): 73.74 to 79.76
Based on AVERAGE move over last 12 quarters: 73.85 to 79.65
Based on MAXIMUM move over last 12 Q’s (9.7%): 69.31 to 84.19
Based on DOWN max only (-9.2%): 69.66

Open to requests for other symbols.