Look at the overall market trend. When the market is in a bull market, don't redeem the fund because of its high net value, because the fund holds a lot of stocks, and bull stocks generally rise better. Don't redeem funds because of short-term shocks, because the stock market has risen and fallen. Short-term shocks can't change the long-term trend, and long-term holdings can make a profit. Many investors who were originally profitable were too greedy to earn more and delayed redemption. As a result, instead of making more profits, they lost some of their original profits. Generally speaking, the stock market has ups and downs. If you don't understand the market and don't redeem it in time, the fund you hold is very likely to lose money. Contrary to not making profits in time, many investors lost money and did not leave in time. In this way, the deeper the hedging, the longer the loss and the longer the holding time. This vicious circle is completely locked in the stock market. If the stock market is not good, especially when the market turns from bull to bear, it is necessary to redeem the funds held, especially the stock funds, and stop the loss quickly, otherwise it will only get deeper and deeper.