Re: [問題] 請問選擇權敏感度的問題??
※ 引述《dreamuz (開心最重要!)》之銘言:
: 我對選擇權的敏感度有點問題耶
: 就是說 delta是期貨指數每漲跌多少之後
: 選擇權會改變多少
: 而gamma則是期貨指數如何影響delta的指標
: 另外vega則是波動率每改變1% 選擇權會改變的價錢
: 我在計算的時候
: 使用 X(價位改變)=F * ((delta+F*gamma))+vega*IV變化量
: 覺得當漲的時候 去計算call好像差不多
: 跌的時候 去計算put好像也差不多
: 但是當漲的時候去算put跌的值
: 我應該要怎麼計算呢?
: 相對的 如果跌的時候要算CALL的值 要怎麼算呢?
: 因為如果用相同方式去算 好像就會不對
: 當然原本那個公式也是我自己瞎掰的啦
: 希望對敏感度有研究的大大可以幫我解惑!
: 另外想要請問
: vega值代表IV上漲1% 選擇權改變的量
: 那如果IV下跌的話 vega也具有意義嗎?
: 如果IV下跌 但是指數卻漲勒?有這樣的可能嗎?
^^^^^^^^^^^^^^^^^^^^^^^^^
http://www.capitalfutures.com.tw/market/new/default-3.asp?xy=6&xt=1
上個禮拜周四周五反彈
結果可以發現 星期五call的波動率大幅減低
其實這一期大家好像都不太敢買call
因為每次上漲他的波動都很低
下跌權利金損失也很慢
或許這周波動率降低是期末效應
畢竟這一期已經快要結數哩
所以之前不會想要賣call 因為波動率太低
但是下周如果繼續反彈 說不定會下場試試看
不知道大家對波動率有什麼心得嗎?
: 如果IV上漲 但是指數卻跌的話,那vega應該是要代表成交價的增加還是減少勒?
: 哈哈沒有學過真是很頭痛XD 不過覺得還蠻好玩低
: 國內的書 對敏感度的介紹 常常都只有在名詞解釋的地方就打住
: 但是我還是希望可以用敏感度來解釋現在履約價的意義
: 我現在對敏感度的認知 是說它沒有辦法預測未來以及趨勢(趨勢還是要看個人分析與見解)
: 但是卻可以做為進場的參考 可以看自己這樣做是否有風險
: 所以很希望把這方面搞懂~~~
: ps 我在柏克萊看到兩本講波動率的書
: 但是在外面書店好像沒有看過
: http://www.books.com.tw/exep/prod/booksfile.php?item=0010388814
: http://www.books.com.tw/exep/prod/booksfile.php?item=0010090043
: 想要請問各位大大有沒有看過這兩本書~還有比較推薦哪一本書?
: 感激不盡!
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※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 59.121.147.190
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