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

May 7, 2019 BO -6.34% Biggest DOWN
Feb. 6, 2019 BO -3.43%
Nov. 6, 2018 BO +0.75%
Aug. 2, 2018 BO +6.99% Biggest UP
May 3, 2018 BO -1.25%
Feb. 8, 2018 BO -3.58%
Nov. 8, 2017 BO +2.66%
Aug. 3, 2017 BO -2.03%
May 4, 2017 BO +6.70%
Feb. 9, 2017 BO +1.91%
Nov. 4, 2016 BO +1.60%
Aug. 4, 2016 BO -1.80%

Avg (+ or -) 3.25%
Bias 0.18%, no significant bias on earnings.

With stock at 300.00 the data suggests these ranges:
Based on current IV (expected move into Friday per TOS): 279.50 to 320.50
Based on AVERAGE one-day move over last 12 quarters: 290.24 to 309.76
Based on MAXIMUM one-day move over last 12 Q’s (7.0%): 279.03 to 320.97
Based on DOWN max only (-6.3%): 290.98

Open to requests for other symbols.