珊同學(xué)
2022-04-03 10:51衍生品 沖刺筆記 87頁(yè),vega notinal的特點(diǎn):第二點(diǎn),example. and the strike will be close to $50,000, 為啥strike 接近 vega notinal?
所屬:CFA Level III > Derivatives and Currency Management 視頻位置 相關(guān)試題
來(lái)源: 視頻位置 相關(guān)試題
1個(gè)回答
Chris Lan助教
2022-04-04 14:08
該回答已被題主采納
同學(xué)你好
這就是vega notional的定義。
Vega notional represents the average profit and loss of the variance swap for a 1% change in volatility from the strike. (當(dāng)realized volatility上下變動(dòng)1%,導(dǎo)致方差互換多頭產(chǎn)生的profit/loss的平均值)
筆記上做了解釋的,因?yàn)椴▌?dòng)變化1%的時(shí)候,方差互換的G/L就是接近于vega notional。公式的推倒(為什么會(huì)這樣的原因)這里也是給大家總結(jié)了的。
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追問(wèn)
Vega notinal 是個(gè)金額的概念,但是strike是百分比。為什么strike 接近vega notinal, 也是一個(gè)金額呢?
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追答
同學(xué)你好
這里并不是執(zhí)行方差會(huì)接近vega notial,而是如果你的實(shí)際方差偏離執(zhí)行方差會(huì)有盈虧,每偏離1%,就會(huì)產(chǎn)生的盈虧就是vega notional。
我覺(jué)得你對(duì)這句話的英文理解有問(wèn)題。
when the vega notional is $50,000, the profit and loss for one volatility point of difference between the realized volatility and the strike will be close to $50,000.
when the vega notional is $50,000,這是條件,是說(shuō)假設(shè)vega notional是50000的時(shí)候。主語(yǔ)是the profit and loss ,而for one volatility point of difference between the realized volatility and the strike 是修飾主語(yǔ)的內(nèi)容,謂語(yǔ)和賓語(yǔ)是be close to $50,000.
所以這句話的理解應(yīng)該是當(dāng)vega notional 假設(shè)是50000的時(shí)候,rezlied volatility和strike volatility有1%的波動(dòng)的差異時(shí),盈虧會(huì)是50000。
