Monetary funds mainly invest in short-term financial products with high security, such as bonds, central bank bills, repurchase, etc. , also known as "quasi-savings products". Their main features are "worry-free principal, convenient demand, regular income, daily income and monthly dividend". In other words, the Monetary Fund calculates the income every day, and then transfers the income to the holder's account in the form of share on a fixed day of each month.