If you buy 1000 copies with a net value of 1.4, you have invested 1400 yuan.

Then it fell to the net value 1.3. At this time, your capital loss is 100 yuan, leaving 1300 yuan.

Then you buy 1.400 yuan with a net value of 1.3, so the share of this purchase is 1.076.92. Because of the decline in net worth, the same money can buy more stocks, which is 76.92 more than last time. Now the total number of copies is 2076.92.

The net value of the index fund is 1.3, and your cost is 1.348.

If the net value of the index fund rises to 1.35 (the average of1.4 and1.3), your cost is 1.348, which is lower than the average of 1.35. At this point, you have begun to make money. (Earned 4 1.53 yuan)

Of course, my example ignores other expenses, such as subscription fee, custody fee, custody fee and redemption fee. Generally, there are only four expenses. Don't underestimate these expenses, they will eat up a large part of your profits.

Pure hand tour, hope to adopt.