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[CFA入门] 关于intere rate call option 请教个问题

根据option duration的计算公式,interest rate call option的duration是正的,利率下降,option价值上升

但interest rate call option是可以用来做cap的,市场利率高过执行利率,call holder收钱.....这两个正好反过来,咋回事?

cap

always remember "cap" = buy a put+ sell a call,

 

 

 value of option is not dependent on interest rate level, but interest rate volatility, according to Black model....

 

payout of a call at expire date equalss to the difference of strike price and the expire day price.

 

holder of a call option receive payout when interest rate is higher than strik because the holder is hedging against higher interest rate. 

[此贴子已经被作者于2010-5-31 16:33:16编辑过]

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楼上说的有点问题

 

 

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你怎么算到利率降,价值升的?

option value = intrinsic value + time value.

 

when interest rate at expiration is greater than strike interest rate, option holder receive intrinsic value.

 

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option也有自己的duration,具体公式见教材 122页 v4

 

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option的duration就是delta吧

 

call option的delta还是underlying asset 上升,Delta上升

 

 

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搞清楚option on stock还是option on interest rate

前者和stock price的 volatility有关

后者和rate volatility有关

而且楼主你想问的是什么?

不知道你表达是什么意思啊

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