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我的交易記錄(2021-08-23,賣出Didi認購期權) - 嵐天看投資 Sky’s views on investing - SmartSkyInvest.com 分享投資知識、經驗及交易記錄 - 股票、債券、房地產投資信託基金、期權 Sharing of investment knowledge, experience and transaction records - Stocks, bonds, reits and options
基本上做short call有兩種情況,第一種就是你本身已有那張call對應股數的正股股票,這種情況叫做covered short call。另一種情況則是你並沒有持有那張call對應數量的股票,這叫naked short call。
做naked short call的風險高很多,假若股價大幅升穿你張short call的行使價,而你本身又沒有持有對應數量的股票,則你必須要以市場的高價購入股票,再以行使價的低價將股票賣出,可想而知若出現去年像Tesla那樣的升幅,你有機會損失慘重。
相反,做covered short call的風險則相對可控,由於你本身已持有相應數量的股票,即使股票在到期日急升,你也不用高價追貨買入,你可以直接將你的持股以行使價賣出,當然你會損失這次股價的升幅,但起碼你潛在損失的風險是可以預先計算到,不會大失所望。
這次covered short call 滴滴的原因
這次我所做的short call滴滴就是covered short call,由於上週剛行使short put以US$8買入300股滴滴出行。其後,我發現由於DIDI的波動很大,所以其相應的期權金價值也很不錯,因此這次就打算做這300股滴滴的covered short call,行使價為US$9,所收取期權金的回報率約5%,一個月計這回報我認為算很不錯了。另外,若一個月後真的能以US$9賣出的話也很不錯,可以賺到股價升幅有12.5%。