A fund rises a few points and falls a few points, generally referring to how much the fund rises and how much it falls that day. For example, investors bought 100 funds with a net worth of 2 yuan. When the net value rose to 2.2 yuan, the fund rose by 10% that day, which means it rose by 10 points. On the second trading day, the net value of the fund fell to 2. 1 yuan, so the decline was 5%. On that day, it lost 5 points, but compared with when it was bought, it earned 5%, so the overall increase was 5 points. In fact, investors don't need to calculate so clearly, and the income of the fund will be detailed. As long as they look at the daily income, they can clearly know that if someone asks how many points the fund has gone up and how many points it has gone down, just tell him the increase. Note: the net value of the fund is accumulated every day after buying, that is, it is assumed that five points are earned on the day after buying, five points are earned on the second day, and 10 points are lost on the third day, which is equivalent to not making money.