Similar to bank deposits, the income is calculated on a daily basis, but at regular intervals (for example, dividends are displayed once a month, and the bank pays interest once a quarter: but interest is paid every day); So you don't have to worry about holding it for a short time without any gains. Display the 7-day annualized interest rate and the 7-day notice deposit interest, and the daily yield is different, thus displaying the 7-day average P/E ratio backwards.