It is best to choose the floor fund as the band. On-site funds have arbitrage advantages. According to market fluctuations, there are premiums and discounts to arbitrage, and the funds in the market can be traded in real time, so that the funds can be sold in time.

On-site funds are traded in the stock exchange, and the funds are traded at real-time market prices, following the principle of price priority and time priority. Over-the-counter funds are not traded on the stock exchange, but are traded at the closing net value, with only one trading price per trading day.