For example, if Tang Xiao buys 20,000 copies of an ETF in the market, the transaction price is 3 yuan, and the commission rate is three ten thousandths, then the formalities he needs to pay for purchasing the fund = 20,000× 3× 3/10000 =18 yuan. ETF funds are on-site funds. When investors trade on the floor, they only charge a commission fee, which is equal to the transaction amount × commission rate. Among them, different securities companies have different commission rates, which are generally three ten thousandths.