Well, it's actually a matter of numbers, which means that the rise comes from places with lower stock prices and the decline comes from places with higher stock prices. In other words, the bases of the two are high and low from the beginning, so the same number of points will rise and fall, the high number will fall more, and the low number will rise less, so the decline is faster than the rise. Also, when the stock rises, it is often not a straight line, and it is slower to go back in three steps. However, once the falling stocks are affected by bad news, market crash, etc., they often plummet. In terms of speed, the fall is also faster.