ETFs are on-exchange funds. Investors can only trade in the secondary market through stock accounts. Therefore, ETFs can only be bought at brokers. There are the following trading rules: 1. Most ETF funds realize t+1 transactions.

method, that is, if you buy on the same day, you can only wait for the next trading day to sell. A very small number of ETFs that invest in Hong Kong, oil, and foreign assets implement the t+0 trading method.

2. Investors only need to pay commission fees when trading ETFs on the market.