NO.PZ201712110100000306
问题如下:
Based on the data in Exhibit 2, Singh would advise Tills that the call option with the largest gamma would have a strike price closest to:
选项:
A.$ 55.00.
$ 67.50.
$ 80.00.
解释:
B is correct.
The $67.50 call option is approximately at the money because the Walnut share price is currently $67.79. Gamma measures the sensitivity of an option’s delta to a change in the underlying. The largest gamma occurs when options are trading at the money or near expiration, when the deltas of such options move quickly toward 1.0 or 0.0. Under these conditions, the gammas tend to be largest and delta hedges are hardest to maintain.
当 option ATM时,gamma最大,所以需要找到当前stock与那个X最接近,因为其与当前市场价格最接近。
1、哪里看出67.5离市场价格最近,我没看到市场价格呀?
2、为什么不能从delta的角度来看,ATM的gamma最大,也就是delta=50bp,那不就是A选项吗