Buy-to-close VALE Jun 19 put@9; $3.55/2.91
30天,收益(3.55-2.91)/(6*0.3)=36%
Buy-to-close VALE Jun 19 put@9; $3/2.89
20天,收益(3-2.89)/(6*0.3)=6%
Buy-to-close VALE 09/18/15 8.00 PUT: $2.1/2.1
40天,收益0
Buy-to-close NOV 05/15/15 60.00 PUT;$9/4.6
80天,收益4.4/(55*0.3)=27%
Buy-to-close BHI Jan 20 2017 PUT@72.5;$15/9.88
130天,收益(15-9.88)/(65*0.3)=26%
sell-to-close HPQ Jan 15 2016 Call@30; $3.55/4.56
20天,收益28%
Sold TWTR; $34.94/51.26
11个月,收益(51.26-34.94)=(50*0.3+50*0.7*6.25%)=95%
Sell covered call HAL Apr 25 2015 @46.5; $2.19