If the value of each product is the same, the income is the same.

The value of each product is different, and the income is different. For example, funds, the price each fund buys today is different from the price it buys tomorrow.

For example, today's fund net value 1.2, 10000 yuan can buy 8000+ copies. The next day, the fund fell, and the net value of 1. 1. 10000 yuan can buy 9000+ copies. But if you buy 30 thousand at a time, your cost is the same.

Therefore, the fund has a fixed investment, the purpose is to buy in batches to spread risks. Every time you buy some, the cost is different, high or low, and eventually you have to amortize or buy at low cost.

If you buy it at one time, you will lose money if you go high.