Short Put 2899 @ $2.9

Sell to open 20 contracts of 2899.HK $2.8 Nov 12 Put @ $0.05
Premium = $2000
交易時的正股價 = $3.07
20手2899正股平均潛在成本 = $2.9 x 20 x 2000 = $116000
項目回報率 = $2000/116000 = 1.72% (或 年度化 25.2%)
組合回報率 = $2000/2214949 = 0.09% (或 年度化 1.32%)
Option引伸波幅 = 37.93%
2899日歷史波幅 = 44.22%
2899於11月29日前收高於$2.9的機會率 = 69.25%

若大市調整，組合將增持一些風險資產。