The daily average turnover rate is a key indicator for evaluating market activity and stock liquidity, and is also a very important factor in quantitative trading. A high turnover rate usually means that the market has a high interest in the stock, trading is active, and there are sufficient buy and sell orders, making it easier for investors to trade at the desired price. In addition, a high turnover rate may also reflect the fluctuation of market sentiment or the frequent operations of major funds. On the contrary, a low turnover rate may indicate that the market has a low interest in the stock, trading is relatively light, liquidity is insufficient, and investors may find it difficult to trade quickly and may face a large impact cost. Changes in the daily average turnover rate can assist in analyzing the changes in market sentiment and serve as an important reference for stock selection and timing in quantitative trading models. In addition, in actual applications, the turnover rate will be compared with historical data or with the turnover rate of other stocks to determine the relative liquidity. It should be noted that a high turnover rate does not necessarily mean that the stock has a high investment value. Investors need to combine other indicators for comprehensive analysis. In addition, for large-cap blue-chip stocks, a relatively low turnover rate may be normal because their shareholder structure is relatively stable.