NO.PZ2023040301000045
问题如下：
A stock now available in the market is quoted $14, a trader place a stop-buy order at 15, a limit order at $20. Which interval the stock price will be if the both two orders are not get satisfied.
选项：
A.Below 15
Between 15 to 20
Above 20
解释：
A stop-buy order becomes valid only after a price rises above the specified stop price, and both orders are not satisfied, thus, the price must be below 15.
价格低于15，对于限价买单，怎么会失效？
