If the difference between a stock's capital inflow and its capital outflow is a positive number, it means that the stock has a net inflow of capital that day; if it is a negative number, it means that the stock has a net outflow that day.

Capital inflow: The trading volume generated when the stock price is rising is the force that drives the stock price to rise. This part of the trading volume is defined as capital inflow.

Capital outflow: The trading volume generated when the stock price is in a falling state is the force that drives the stock price down. This part of the trading volume is defined as capital outflow.

Customers take the initiative to buy or sell.

Taking the initiative to buy means an inflow, and taking the initiative to sell means a net outflow.

For example, if the current price of a stock is 8.50 yuan, and someone directly quotes 8.51 yuan or more to buy it, it is considered a net inflow.

In the same way, if someone takes the initiative to sell, it is a net outflow.

Extended information: If stock capital inflows increase compared with the previous minute, then the trading volume of this minute will be counted as capital inflows, and vice versa. If the index has not changed compared with the previous minute, then it will not be counted.

Calculated once every minute and totaled once a day, the difference between inflows and outflows is the net inflow of funds for the stock that day.

Fund flow is a data indicator system that reflects the market's long and short buying and selling willingness and the trading willingness of major retail investors.

Capital flow analysis belongs to the dual fields of behavioral finance and technical indicators. It analyzes and predicts stock price behavior by analyzing long and short buying and selling willingness and the gaming behavior of major retail investors, which has high reference significance for short-term operations.