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

May 22, 2020 BO -5.87%
Feb. 13, 2020 BO -1.76%
Nov. 1, 2019 BO -0.11%
Aug. 15, 2019 BO +3.02%
May 15, 2019 BO +1.57%
Jan. 30, 2019 BO +6.33% Biggest UP
Nov. 2, 2018 BO -2.41%
Aug. 23, 2018 BO -3.15%
May 4, 2018 BO +3.52%
Feb. 1, 2018 BO -5.90% Biggest DOWN
Nov. 2, 2017 BO -0.68%
Aug. 17, 2017 BO +2.77%

Avg (+ or -) 3.09%
Bias -0.22%, no significant bias on earnings.

With stock at 258.00 the data suggests these ranges:
Based on current IV (expected move into Friday per TOS): 244.69 to 271.31 (+/- 5.2%)
Based on AVERAGE one-day move over last 12 quarters: 250.03 to 265.97
Based on MAXIMUM one-day move over last 12 Q’s (6.3%): 241.67 to 274.33
Based on DOWN max only (-5.9%): 242.78

Open to requests for other symbols.