If the fund loses money, there are idle funds to cover the position, because the loss means that the unit net value of the current fund is lower than the cost price of the position, so the cost can be diluted. The specific methods of covering positions are: 1. When covering positions, it depends on the market index and the current stock market environment. If the general environment continues to decline, you can wait for signs of stopping falling before covering your position. If it is a structural market, you can make up the position at the bottom of the structure. 2. When covering the position, it depends on the trend of the underlying index and the underlying stock. If the callback is large, you can make up the position in batches; For example, the leading stocks have fallen recently, and the cost will be less and less if they cover their positions in the short-term moving average and continue to cover their positions below the short-term moving average. 3. When covering positions, you can use the method of covering positions in the same amount. For example, for every drop of 1%, it will cover the position of 1 000 yuan, and for a drop of 2%, it will cover the position of 2000 yuan. If investors can't analyze and judge the fund trend after purchasing the fund, they can directly set up a smart fund to make a fixed investment, and smart investment will choose to deduct more or less according to the fund trend. There are still great risks in fund investment, and the loss of principal will be great, so fund investment still needs to be decided according to its own risk tolerance and its own economic situation.