The 50% profit of the fund's fixed investment is a very high yield. Investors can choose to sell a part first to ensure a part of the income. If the fund rises again, investors can sell some more until all the funds are sold. If the fund then falls, then they can sell it all and re-choose other funds to invest.

The fixed investment of the fund needs to take profit and ensure the income, but the fixed investment of the fund does not need to stop loss. The more you fall, the more you buy. The more the fund falls, the lower the cost of buying the fund, and the more cost-effective.