Fund 10000 yuan lost 5000 yuan, calculated as follows, 5000/ 10000=50%, that is to say, lost 50%. Fund income = (current net value-net value at the time of purchase) * fund share handling fee. If the current net value of the fund is lower than the net value of the position cost, investors will lose money; If the current net value of the fund is higher than the net value of the position cost, the investor will make a profit.