For example, if an investor buys a fund with a net value of 654.38+00000 yuan, he can buy 5000 shares without considering the handling fee, and the position amount after buying is: 2 yuan ×5000 shares = 654.38+00000 yuan. When the net value rose to 3 yuan, the position at this time was: 3 yuan × 5,000 shares =15,000 yuan, which means that investors earned 5,000 yuan.

Yesterday's income refers to the income brought by the subject matter held by investors yesterday, and the reference time for calculation is yesterday.

For example, an investor buys a stock 1 1,000 shares on the 20th, and the stock price at the time of purchase is 10 yuan; On the 25th, the stock opened at 7 yuan and closed at 7.5 yuan. The closing price of the stock on 26th is 7.2 yuan, so the return of investors yesterday is = 1, 000× (7.5-7) = 500 yuan.