Haitong Lecture
牛熊證攻略 第二節

選擇牛熊證時應注意

買賣牛熊證時先以留意行使價及收回價, 如果換股比率相同,牛證的收回價愈低,被強制性收回的風險的愈低。
同時它的行使價愈低,內在值會愈高,價格理論上都會愈高。
牛證內在值=(正股價格-行使價) / 換股比率

相反,熊證的收回價愈高,被強制性收回的風險愈低, 而它的行使價愈高,內在值會愈高,價值理論上都會愈高。
熊證內在值=(行使價-正股價格) /換股比率

如果牛熊證的行使價及收回價愈貼近正股價格,風險便愈大 因被收回機會較大,回報亦較高。

牛熊證敏感度

另外亦要透過換股比率,留意牛熊證的敏感度, 以同一價格區域的牛熊證為例,兌換比率愈小,牛熊證的敏感度愈高。
10000:1 的牛熊證,比15000:1的牛熊證相對敏感

當市況波動時,投資者不需要選擇高敏感度的產品並可以減少入市金額,減低風險。 當市況波動性低,投資者可考慮敏感度較高,換股比率較小的產品應市。我們亦可以透過這條算式,知道正股跳動對輪格跳動的影響。
牛熊證敏感度=最小跳動格數x換股比率

根據港交所的指引,香港所有的股票及輪證都會按照它們的價格,而有它們的最低買賣價位, 即牛熊證跳動一格的價錢,大家可以參考這一個列表。

當恒指牛熊證價格0.25元以下,換股比率是10000
其最低買賣價位是0.001,亦即證價最小跳動價位
該牛熊證的敏感度 (0.001 x 10000 = 10)
表示期指每上升或下跌10點,恒指牛熊證便會移動一格

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