business speculation

例句：

1. 1. The company's stock price has been on a sharp rise since the announcement of its new product line.
   自宣布推出新产品线以来，该公司的股票价格已大幅上涨。
2. 2.The government is considering whether to invest in this emerging industry as a way to stimulate economic growth.
   政府正在考虑是否投资于这一新兴行业，以刺激经济增长。
3. 3. Business speculators often use complex financial instruments to make quick profits from market fluctuations.
   商业投机者经常使用复杂的金融工具从市场波动中迅速获利。