Money market funds distribute income daily, and the net share value remains unchanged, which is 1 yuan. Therefore, unlike other types of funds, money market funds do not disclose their net share value regularly, but need to disclose income announcements, including the net income per 10,000 funds and the annualized rate of return in the last seven days. According to the different disclosure time, the income announcement of money market funds can be divided into three categories, namely closed income announcement, open day income announcement and holiday income announcement.