Money flow is a concept used by investors to measure the strength of a stock's performance over a specific period of time. It is calculated by subtracting the amount of money leaving (outflow) the company from the amount of money coming in (inflow). If more money is entering the company than is leaving, then the money flow is considered positive. Conversely, if more money is leaving the company than is entering, then the money flow is considered negative.

Money flow can be used by investors to identify trends in a stock's performance and to make more informed investment decisions. It can help investors determine when to buy and sell stocks, as well as when to stay away from a stock. For example, if a stock is exhibiting strong positive money flow, it may be a sign that the stock is undervalued and may soon show higher returns. On the other hand, if a stock is exhibiting negative money flow, it may be a sign that the stock's price is overinflated and that caution should be taken when investing in it.

Money flow can also be used to measure investor sentiment. High positive money flow can indicate that investors are optimistic about the stock and believe the stock will continue to grow. On the other hand, high negative money flow can indicate that investors believe the stock is overvalued and will soon decline.

Overall, money flow is an important concept that investors should consider when making investment decisions. It can provide insight into a stock's current and future performance, as well as offer insights into investors’ sentiment towards the stock. Investors should use money flow in conjunction with other research to make smarter and more informed investment decisions.