rampant speculation

• 猖狂的投机；无约束的投机

rampant speculation的用法和样例：

例句

1. Then stocks are permitted to sink to a level where hope gives way to despair and the most rampant bull becomes a bear and sells out with a loss.
   在这之后股票开始堕落到一个可以使你的希望崩溃成绝望的水平上，最猖狂的疯牛变成了狗熊让你卖出就要承受损失。
2. His speculation reduced him to beggary.
   他的投机使他陷于赤贫。
3. He ventured on a rash speculation.
   他进行鲁莽的投机。