The net value in the fund is lower than the net value in the fund. The ETF in the market will correspond to an OTC fund, which refers to the kind bought and sold in Alipay. When the net value of this fund is lower than the net value in the market, it is negative at this time, indicating that there is a strong bearish sentiment in the market and many people are selling. ETF is generally an index fund that is listed and traded, that is to say, it can be bought and sold in trading software like stocks.