NO.PZ2019070101000028
问题如下:
A delta-neutral position has a gamma of 4,800. A 0.8 delta option has a gamma of 1.8. In order to generate a gamma-neutral position, we sell 2,667 of the options.
Which of the following will restore a delta-neutral position?
选项:
A.Long 2667 shares of the underlying asset.
B.
Short 2667 shares of the underlying asset.
C.Long 2134 shares of the underlying asset.
D.Short 2134 shares of the underlying asset.
解释:
C is correct.
考点: delta-neutral
解析: 为了使得gamma-neutral, 将头寸中4,800 的gamma降到0,卖出2,667份期权。 此时gamma=0,但是delta变成了-0.8*2667= -2133.6
为了再次实现 delta-neutral , 需要买入股票2133.6份,四舍五入为2134份。
请问可以解释一下为什么要用-0.8乘吗?考点应该是ns*delta s+nc*delta c=0但是这里有点对应不上考点呢
谢谢解答