ISRG earnings analysis

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

April 16, 2020 AC +3.11%
Jan. 23, 2020 AC -4.19%
Oct. 17, 2019 AC +6.96%
July 18, 2019 AC -1.45%
April 18, 2019 AC -7.00% Biggest DOWN
Jan. 24, 2019 AC -3.93%
Oct. 18, 2018 AC -3.45%
July 19, 2018 AC -0.86%
April 17, 2018 AC +8.17% Biggest UP
Jan. 25, 2018 AC -2.12%
Oct. 19, 2017 AC +3.39%
July 20, 2017 AC -4.55%

Avg (+ or -) 4.10%
Bias -0.49%, negative bias on earnings.

With stock at 665.00 the data suggests these ranges:
Based on current IV (expected move into Friday per TOS): 627.36 to 702.64 (+/- 5.7%)
Based on AVERAGE one-day move over last 12 quarters: 637.75 to 692.25
Based on MAXIMUM one-day move over last 12 Q’s (8.2%): 610.67 to 719.33
Based on DOWN max only (-7.0%): 618.45

Open to requests for other symbols.