The first case: ordinary fixed investment, without any additional positions.
In the second case, when the Shanghai Composite Index falls by more than 3%, the upside-down pyramid strategy is adopted to cover the positions, and the amount is set to 30%, 50%, 80%, 100% and 150% of the fixed investment amount each time.
By analyzing the statistical data, we find that in the case of regular fixed investment, the yield of fixed investment interval is 12.4%, and if we add positions according to the second case, when the ratio of adding positions is increased to 150%, the yield of fixed investment interval is 13.4%, so adding positions when falling is effective.
Since the fund can make up its position when it falls, how can it make up its position to get a better effect of improving its income? So we added a set of calculation data: when the Shanghai Composite Index fell by more than 3% and the P/E ratio was lower than 13, we increased our positions.
The inverted pyramid strategy is also adopted to cover the positions, and the amount is set to 30%, 50%, 80%, 100% and 150% of each fixed investment.
When the proportion of fixed investment in the current month reaches 150%, in the case of the second method, the yield of fixed investment interval is 14.4%. In this set of conditions for adding positions, we added the condition of P/E ratio. When the P/E ratio of the Shanghai Composite Index is lower than 13, it means that the Shanghai Composite Index is in a relatively low valuation range. In other words, when the index falls and the valuation is relatively low, the effect of increasing returns will be more obvious. Although the improvement of one or two points seems to be very small, if the investment time is extended and the compound interest effect is added, it will be a great improvement.