Novices can consider discounts and premiums when buying etf funds, and investors can arbitrage through discounts and premiums. When the etf fund generates a premium, investors can transfer the funds to the on-market sales, and when the etf fund generates a discount, investors can transfer the funds to the off-market sales.

Etf funds mainly earn bid-ask spreads. Novices trading etf funds, it is more important to choose trading points. Only by buying at a low price and selling at a high price can he make a profit.