Investing in the stock market is like walking a high-wire, requiring great skill and caution.

high-wire 是由 high（高的）和 wire（钢丝）组成的复合词，字面意思是"高处的钢丝"。 walking a high-wire 是比喻用法，指"进行高风险的活动"，就像杂技演员在高空走钢丝一样需要高度专注和技巧。