发亮_品职助教 · 2019年05月15日
首先我们学的Condor的要求是Money duration neutral,上面4个头寸可以分成2组:
Long 2-year / Short 5-year,这是一组,这组组内要达到Money duration neutral。比方2-year/5-year各自的Money duration是100,000;
Long / Short后这组的Money duration = 100,000 - 100,000 = 0
Long 30-year / short 10-year,这是一组,这组组内要到达Money duration neutral,比方说10-year、30-year各自的Money duration是80,000
Long / Short后这组的Money duration = 80,000- 80,000 = 0
到这里上面这个已经是一个Condor策略了,也就是左右两边的翅膀,各自达到Money duration neutral即可:
也就是 Long 2-year / short 5-year money duration neutral;
Long 30-year / Short 10-year money duration neutral;
因为2-year和10-year不在一组,所以他俩的Money duration可以不相等,比如上面的例子2-year的Money duration是100,000;10-year的Money duration是80,000;
同理2-year,30-year也不在一组,所以他俩的Money duration neutral也不要求相等。
“然后他们四个头寸之间又可以做到money duration neutral 吗?”
所以,不需要4个头寸做到Money duration neutral,只需要左右两边各自达到Money duration neutral即可
但有一种特殊的Condor,也是我们原版书例题、课后题的Condor,他说上面4个头寸的Money duration都相等,即:
2-year money duration = 5-year money duration = 10-year money duration = 30-year money duration
同时,Long 2-year / short 5-year,所以这组组内达到Money duration-neutral;
Long 30-year / short 10-year,所以这组组内达到Money duration-neutral。
这就是我们这种特殊的Condor。
我们原版书有道课后题,是已知30-year的money duration,让求2-year的Market value,所以那道题就是默认四个头寸的Money duration都相等。
chocky · 2019年05月15日
太详细啦!感谢!所以我们学的,一直是默认左边两个,和右边两个的头寸是money duration neutral 的吗!然后四个头寸整体也是duration neutral 的