#Earnings — $BIG reports tomorrow. Below are details on earnings EIGHT-day moves over the last 12 quarters (since next available options expire in 8 days).

Fri 12/07/2018 BO -29.28% Biggest DOWN
Fri 08/31/2018 BO -10.10%
Fri 06/01/2018 BO +4.54%
Fri 03/09/2018 BO -12.93%
Fri 12/01/2017 BO +0.76%
Fri 08/25/2017 BO -4.59%
Fri 05/26/2017 BO +3.28%
Fri 03/03/2017 BO -1.89%
Fri 12/02/2016 BO +8.09%
Fri 08/26/2016 BO -5.76%
Fri 05/27/2016 BO +18.85% Biggest UP
Fri 03/04/2016 BO +8.88%

Avg (+ or -) 9.08%
Bias -1.68%, negative bias on earnings.

With stock at 31.65 the data suggests these ranges:
Based on current IV (expected move into Friday per TOS): 27.41 to 35.89
Based on AVERAGE move over last 12 quarters: 28.78 to 34.52
Based on MAXIMUM move over last 12 Q’s (29.3%): 22.38 to 40.92
Based on Max UP only (+18.9%): 37.62

Open to requests for other symbols.