Generally speaking, the 10 points increase of stocks is calculated according to the closing price of individual stocks on the previous trading day, that is, the stock increase=(the market price of the stock on the current day - the closing price of the previous day)/the closing price of the previous day × 100%=10%. For example, if the market price of individual stocks on the current day is RMB 11 and the closing price of the previous day is RMB 10, then the increase of individual stocks on the current day=(11-10)/10 × 100%=10%.
In addition, some investors will also calculate their increase based on their position cost at the time of purchase and the market price of the stock. That is, their increase=(the market price of the stock on the current day - the position cost)/the closing price of the previous day × 100%. When the increase is 10%, investors call it 10 points of profit or 10 points of increase.
For example, when Xiao Li bought it when the stock market price was 10 yuan, and after buying it, the stock price rose for a period of time, and the stock price was 11 yuan, then the profit of Xiao Li's purchase of the stock was: increase=(11-10)/10 × 100%=10%, that is, 10 points.