Because the net value of money per unit is fixed at 1 yuan, the cumulative income of 10000 shares is the profit of 1 000 yuan on the investment day. Converted into the rate of return, the unit income of ten thousand funds is 100 yuan, which is equivalent to the rate of return of100/10000 = 1%. There are many reasons why the income of ten thousand fund units fluctuates greatly, especially around holidays. Due to the great changes of market liquidity and the demand for safe profit-seeking of funds, the market liquidity dried up in a short time, which led to the soaring short-term lending rate of funds and the rising borrowing cost, reflecting the expectation of monetary policy and the trend of market funds. Because this phenomenon appears for a short time, the sensitivity of arbitrage funds is high, and the soaring income is only an individual phenomenon. It does not affect the overall maturity income, so it is not easy to grasp such an opportunity, and there is no need to change the overall operational thinking. The seven-day annualized rate of return of the money fund may better explain the fund's income.