speculative market

例句：

1. 1.The stock market is highly speculative, and investors should exercise caution.
   股市高度投机，投资者应谨慎行事。
2. 2. The company's decision to invest in a new technology was speculative, but it paid off in the end.
   公司决定投资新技术是投机的，但最终得到了回报。
3. 3. The speculative market has been volatile lately, with many stocks experiencing significant price fluctuations.
   投机市场近期波动较大，许多股票价格出现大幅波动。