Option Chain for Global Blood Therapeutics Inc. (GBT) 

$ 54.24   0.26 (+0.48%) Volume: 1.33m 4:00 PM EDT 17-Jun-2019
After Hours:  $ 54.24 0.00 (0.00%) Volume: 38.89k 5:56 PM EDT 17-Jun-2019
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Jun 19  |  Jul 19  |  Sep 19  |  Dec 19  |  Jan 20  |  Jan 21  |  Near Term  |  All
Calls Last Chg Volume Open Int Root Strike Puts Last Chg Volume Open Int
21-Jun-2019 4.00 -0.38 158 401 GBT 50.00 21-Jun-2019 0.20 - 1943 7013
21-Jun-2019 0.75 -0.40 567 7494 GBT 55.00 21-Jun-2019 1.80 -0.25 38 3906