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安氏大俗商业学:一道投资公司招聘资金管理人的面试题目 |
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安氏大俗商业学:一道投资公司招聘资金管理人的面试题目 -- 安普若 - (701 Byte) 2005-8-15 周一, 09:50 (11260 reads) |
Tom12

头衔: 海归少校
加入时间: 2005/08/16 文章: 33 来自: US 海归分: 11249
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作者:Tom12 在 海归商务 发贴, 来自【海归网】 http://www.haiguinet.com
First, let’s make a few assumptions:
1. Assume that if your investment fail, you would lose all your principal (the question is not explicit about this)
2. Investor is Risk neutral, so we can forget about the utility curve and concentrate on maximizing return
3. 100 is the population -- assuming in the 100 opportunities I will lose 40 times and win 60 times.
4. Each opportunity is independent, as they are random events
Base on these assumptions, the total return will depends on the permutation of the 100 investment outcomes, and we need to determine how much to put in each of these 100 baskets. Over the course of investments, the average succeed rate should tend to reverse to the mean 60%, and the reversion elasticity remain constant.
Therefore the basic investment strategy is:
1. To maintain the ability to invest if you lose 40 times in a row. so the first wager cannot exceed $22. (( 1000-40*2)/41=22.44). And depending on the result of first investment, the second wager should be equal or larger than $22, and so on.
2. To increase you stake after you lose a round and decrease you stake after you win a round. (How much to increase or decrease could be determined by a mean-reversion simulation model)
3. At the point where the number of wins is 20 more than the number of fails, stop the game.
作者:Tom12 在 海归商务 发贴, 来自【海归网】 http://www.haiguinet.com
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安氏大俗商业学:一道投资公司招聘资金管理人的面试题目 -- 安普若 - (701 Byte) 2005-8-15 周一, 09:50 (11260 reads) - 搞不懂 -- pchf005 - (3 Byte) 2008-7-15 周二, 14:02 (234 reads)
- 标准答案来了 -- ikonos - (332 Byte) 2005-8-16 周二, 16:02 (1345 reads)
- A basis strategy (No math) -- Tom12 - (1345 Byte) 2005-8-16 周二, 03:31 (575 reads)
- 标准答案 -- feebe - (253 Byte) 2005-8-15 周一, 21:02 (1311 reads)
- 瞧瞧这广告做的, -- 小报记者 - (24 Byte) 2005-8-15 周一, 21:56 (567 reads)
- 不一样 -- feebe - (0 Byte) 2005-8-16 周二, 00:32 (399 reads)
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