"Fixed investment" is the abbreviation of regular fixed investment of funds, which refers to investing in designated open-end funds with a fixed amount (such as 200 yuan) at a fixed time (such as X day of each month). Although this method is similar to a bank, it is often called lazy financial management. Its biggest advantage is the average investment cost, avoiding timing risks, but it is necessary to make plans and invest carefully in the fixed investment business. "Single purchase" refers to one-time purchase of funds.

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