Etf can arbitrage, investors can use its trend of selling high and attracting low to arbitrage, or they can use the price difference between the on-site market and the off-site market to arbitrage, that is, when the on-site market price is lower than the net value of the off-site fund, investors can buy the fund in the stock account on T day, and then redeem the fund in the column of "On-site fund", and the funds will arrive on T+2 day; When the on-the-spot market price is higher than the net value of OTC funds, investors can buy the funds in the column of "OTC funds" in the stock account on T+ 1 day, and complete arbitrage in the OTC market on T+2.