Fisher's index

例句：

1. 1. The Fisher's index is used to measure the efficiency of a company's operations.
   费舍尔指数用于衡量公司运营的效率。
2. 2. The Fisher's index has been shown to be effective in predicting market trends.
   费舍尔指数已被证明在预测市场趋势方面是有效的。
3. 3. The Fisher's index is based on the ratio of total assets to total liabilities.
   费舍尔指数基于总资产与总负债的比率。