Yes, funds mainly earn bid-ask spreads, buying at low prices and selling at high prices to make money. There is no specific standard for the price of funds, which is difficult for ordinary investors to grasp. They can only judge the level of funds through historical points.

Buying a fund at a low price has lower cost, less risk and greater possibility of profit; On the contrary, buying a fund at a high price has higher cost, lower expected return, greater risk and greater possibility of loss.