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

Jan. 30, 2019 BO +9.11%
Oct. 31, 2018 BO +3.79%
July 25, 2018 BO +0.75%
April 25, 2018 BO +6.15%
Jan. 31, 2018 BO +1.81%
Oct. 25, 2017 BO +5.35%
July 26, 2017 BO -2.93%
April 26, 2017 BO +3.80%
Feb. 1, 2017 BO +4.31%
Nov. 2, 2016 BO +4.74%
July 27, 2016 BO -2.71%
April 27, 2016 BO -1.57%

Avg (+ or -) 3.92%
Bias 2.72%, strong positive bias on earnings.

With stock at 250.00 the data suggests these ranges:
Based on current IV (expected move into Friday per TOS): 236.54 to 263.46
Based on AVERAGE move over last 12 quarters: 240.20 to 259.80
Based on MAXIMUM move over last 12 Q’s (9.1%): 227.23 to 272.78
Based on DOWN max only (-2.9%): 242.68

Open to requests for other symbols.