Yes, it is theoretically possible to realize T+0 trading by making short-term profits from the price difference between the two markets. The primary market refers to the direct investment of the same kind of rights and interests that the fund company applies for redemption outside the market, so it is called the primary market, and the price of the primary market is the net value of the fund; The secondary market refers to the buying and selling behavior in the securities market, which is similar to the transfer of equity, so it is called the secondary market. The price of the secondary market fluctuates around the net value and is affected by the relationship between supply and demand, so there is a price difference. The conversion between the two markets needs to be transferred to custody, which I have never done. But:

1, ETF funds have a high threshold, basically no million, and no operating rights. At present, the ETF with the lowest threshold should be newly developed by Harvest, which is several hundred thousand.

2.ETF funds have good liquidity, basically limited spreads and limited arbitrage space. Theoretically, it can be operated and the procedures are complicated, but it is not easy to play.