问题如下：
Tim has sold short 200 shares of PZ company When the stock price at $40 per share. Simultaneously, he has placed a "good-till-cancelled, stop 48, limit 53 buy" order. Assume that Tim's stop condition is satisfied and the order becomes valid and will be executed. Ignoring the transaction cost, Which of the following statements is correct?
选项：
A.Tim's maximum possible loss is $1,000.
B.Tim's maximum possible loss is $2,600.
C.Tim's maximum possible loss is unlimited.
解释：
B is correct.
If the stock price of PZ company crosses $48, the stop buy oder will become valid and then will be executed at a maximum limit price of $53.
The maximum loss for Tim is ($53-$40)×200=$2600
请问这是个复合指令么？指令的最终执行效果是希望在 53 的时候 buy，但是执行条件是要至少满足股价达到 48？
那不知道为啥要有个 48 的条件在这里，直接设置一个 limit 53 为啥不可以呢？从 40 一路涨上来，到了 53 也会自动买啊？
考虑一下几种情况：
- 股价直接达到 53，越过了 48这个条件，是买还是不买？
- 股价达到了 48，但是又回调了，之后再重新经历 48，53 这个阶段，还会在 53 买入生效么？
