Simple rate of return = (closing price-opening price)/opening price × 100%

2. Calculation formula of compound rate of return:

Compound rate of return =(( 1+ single rate of return) n- 1) × 100%.

Among them, the single-period rate of return = (closing price-opening price)/opening price n is the number of investment periods. 3. Calculation formula of annualized rate of return:

Annualized rate of return =( 1+ compound rate of return) (365/ investment days)-1, where the compound rate of return is the value in the above formula of compound rate of return, and the investment days are the actual investment days.