X^(B)_2, but now we've got a more

同理 X^(B)_1, X^(B)_2
complicated world.

但是这里更复杂了
There's stocks to be traded and there's the price of stocks.

因为我们加入股票交易
So P--pi_alpha, I'm running out of letters.

我要换用希腊字母表示
I'm going to switch to a Greek one.

π α 表示α 股票的价格
This is the price of stock A, stock alpha.

股票α
And pi_beta is the price of stock beta.

πβ 是β 股的价格
And then we have to know how many shares are they going to hold?

还要知道他们持股的数目
Well, it's going be theta^(A), A's going to hold a certain

θα-A 是人A持有的α股的数量
number of shares of alpha, and theta^(A)_beta,

θβ-A 是A 持有的β股数量
A's going to hold a certain number of shares of stock beta,

另外
and B's going to hold a certain number of shares of alpha and a

θα-B 和θβ-B 分别是人B