index realm

例句：

1. 1. The index of the stock market is closely watched by investors.
   投资者密切关注股市的指数。
2. 2. The index of the economy has been rising steadily for the past few months.
   经济指数在过去几个月里稳步上升。
3. 3. The index of the company's stock price has increased by 5% since last year.
   该公司股票价格指数自去年以来已上涨了5%。