作者 |
安氏大俗商业学:一道关于风险投资的面试题目的改良版 |
|
所跟贴 |
安氏大俗商业学:一道关于风险投资的面试题目的改良版 -- 安普若 - (860 Byte) 2005-8-17 周三, 13:17 (7123 reads) |
palo-alto [博客] [个人文集]
游客
|
|
作者:游客 在 海归商务 发贴, 来自【海归网】 http://www.haiguinet.com
1) Wrong. You only get 10% success rate even if you believed every company you invested will hit big. If a company is only 10% chance, forget about it
2) Wrong. 10% is average. You will get close to the when you do many times. If you do it a few time, wish you luck.
3) Correct if the only one in ten get anything at all (all other 9 get zero).
Here is my attempt for your previous question.
Assumption:
- All investments are down at the same time
- The transaction cost ($2) is paid up-front
If n = the number of investments, you get
Total Return = n(1000/n - 2)*0.6*2 = 1200-2.4n.
It is a classic risk vs return:
If you are risk taker, put all 1000 in one investment, you get the best result - $1197.6 on average (but you have a 40% chance of losing everything).
If you increase n, you get lower return but your chance of losing everything is also reduced. (e.g., is n=3, you have 7% chance of losing everything)
However, dont try n=>83, you are a loser on average. If you try 100 investments of $10, you get $960 on average:-)
作者:游客 在 海归商务 发贴, 来自【海归网】 http://www.haiguinet.com
|
|
|
返回顶端 |
|
|
|
|
|
|
您不能在本论坛发表新主题, 不能回复主题, 不能编辑自己的文章, 不能删除自己的文章, 不能发表投票, 您 不可以 发表活动帖子在本论坛, 不能添加附件不能下载文件, |
|
|