Option Chain for Global Blood Therapeutics Inc. (GBT) 

$ 63.82   -0.22 (-0.34%) Volume: 855.05k 4:00 PM EDT Aug 7, 2020
After Hours:  $ 63.82 0.00 (0.00%) Volume: 11.56k 4:45 PM EDT Aug 7, 2020
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Aug 20  |  Sep 20  |  Dec 20  |  Jan 21  |  Mar 21  |  Jan 22  |  Near Term  |  All
Calls Last Chg Volume Open Int Root Strike Puts Last Chg Volume Open Int
Aug 21, 2020 5.20 -0.41 27 10 GBT 60.00 Aug 21, 2020 1.18 - 3 100
Aug 21, 2020 1.95 -0.44 180 69 GBT 65.00 Aug 21, 2020 3.50 0.35 20 333
Aug 21, 2020 0.50 -0.36 25 2269 GBT 70.00 Aug 21, 2020 6.00 -0.10 336 595