Statement: A business with a long exposure to an asset would hedge this exposure by entering into a short futures contract OR by buying a put option.Question: Why?? 为什么不是call option?
luyoyoe 发表于 2010-5-7 19:02
long exposure是什么意思?为什么long exposure被理解为怕asset贬值?我以为long exposure理解为take a long position。因为在以后需要买进,所以怕到时候的spot price比现在的current price高。
买看跌期权时(不计期权费),资产价格下跌对于你是有利的,因为你可以以定好的执行价格(denoted by Kor X) ,which generally bigger than the price of asserts now) ,你可赚st-k ,the same with short position in futures contract .
incidentlly,the reason why you not selling a call option is the risk is bigger than buying a calling option,which is often used by 投机者or 套利者,rather hedgers.
我也是刚学,也思考过这个问题,用的是hull的书(第5.6.7原版在其网站上勘误表,可通过郑振龙网站连接),中英混杂请不要介意。