宝马公司的面试题，看你是否适合做个投资人

apollochil

一个人花8块钱买了只鸡，9块钱卖了，又10块钱买回来，11块钱又卖了，问他赚了多少钱？ 99%的人做错了，你能答对吗？！”

sycamores

贡献了GDP

源济

SpringMountain

So, in another word:
If you purchased QQQ at $58, and sold at $59, then it went up to $60, so you purchased it at $60, and sold at $61.
Now BMW said your profit is $1.
???

triestino

按照题解回头推理，显示题意不清楚，误导。

SpringMountain

If someone did not purchase, he had opportunity lost of $3 when QQQ went up to $61, and opportunity gain of $8 when it later went down to $50.

It all depends on where do you want to set as reference point.

匪兵甲

回复 apollochil 的帖子

经济学上亏两块- 同意;
数学上赚一块 - 不同意, 数学上还是应该赚了两块.
在一个完整的基础数学推倒过程, 主体和客体是不应该偷换的. my 2 cents.

silicon_beaver

gain $1, twice, hence $2 = $1 x2. assume no borrow cost.

So easy.

ppteam

this is total bull shit

xiaochong

bullshit!

Stein

个体的单次交易无法改变商品的价格，更别谈价值。