Mock exam morning session 中的89题 morning, version, online, 保证金

dece2011

我的就算是用（7000-100*60*0.4）/2400,但是没有这个答案，这道题和online exam version 2中的40题很像，但40题是用16000减去初始保证金计算的，请老师解答，谢谢

willsucceed

Initial investment=60*100*40%=2400
Purchase value=60*100=6000
Resale value=70*100=7000
Gross return=(7000-6000)/2400=41,7%
As the broker who make the lending can only achieve a fixed return on interests which are ignored here, the difference between purchase value and resale value completely belongs to the investor. That's to say, he made a return of USD1000 by investing only USD2400.

In fact, we can make the calculate simpler by using the concept of leverage.

Return without leverage=70/60-1=16.7%
Return with leverage=16.7%/40%=41,7%