call option

例句：

1. 1. The companyissued a new stock offering as part of its initial public offering (IPO).
   该公司作为首次公开募股的一部分发行了新股票。
2. 2. The investor bought the call option to buy shares at a specific price before the stock price rose.
   投资者购买了看涨期权，以在股票价格上涨之前以特定价格购买股票。
3. 3. The trader used the call option to hedge against potential losses in the market fluctuations.
   交易者使用看涨期权来对冲市场波动可能带来的潜在损失。