NO.PZ2019010402000030
问题如下:
A manager owns 500 shares of stock XYZ, the portfolio delta is 500, Deltac = 0.548, Deltap= -0.622. The manger could implement delta hedge by:
选项:
A.selling 912 call options
B.buying 912 call options
C.selling 804 put options
解释:
A is correct.
考点:delta hedge
解析:
如果hedge工具是call,根据公式:
NH =- Portfolio delta/DeltaH =-500/0.548=-912,负号代表short,所以应该short 912 份call。
如果hedge工具是Put,根据公式:
NH =- Portfolio delta/DeltaH =-500/(-0.622)=804,正号代表long,所以应该long 804份put。
根据portfolio=long stock + short call
即portfolio=ns*S0+nc*C0
要使△p/△S=ns*△S0/△S+nc*△C0/△S=0
已知:ns=500,△C0/△S=0.548
则500*1+nc*0.548=0
求得nc=-912,即short 912份call