问题如下:
A portfolio manager wants to construct a bear spread using put options. An exercise price of $50 is priced at $3 and exercise price of $60 is priced at $10. Both the puts expire in one month and have the same underlying, which is currently trading at $55. the maximum profit and maximum loss, respectively, are:
选项:
A.7 and 3
B.3 and 7
C.5 and 5
解释:
B is correct.
考点:bear spread
解析:
用put构建bear spread(下跌时赚钱),应该long执行价格较高的put来赚钱,同时short执行价格较低的put来cover成本,用公式表达即:
当ST<50时有最大收益,此时两个期权均被执行,maximum profit=60-ST-10-[(50-ST)-3]=3
当ST>60时有最大亏损,此时两个期权均不被执行,Max loss=(0-10)-(0-3)=-7,负数代表亏损
您好这道题用强化班讲义第4页的公式,即MAX PROFIT=PL-PH,好像算不出来啊