1. Protect the rights and interests of investors. When the fund market is good, there will be a large number of investors rushing to buy funds. If the subscription amount is not limited, a large amount of funds will be bought in a short time, which will lead to the rapid expansion of the fund scale. If not handled properly, it will dilute the income of other investors.

2. The fund is too large, but it is not easy to operate. As the saying goes, "the ship is too big to turn the corner", that is, the scale of the fund is too large for the fund manager to manage. Take stock funds as an example. Suppose the size of a stock fund is 654.38+000 billion. However, according to national regulations, it is required to invest less than 80% of the fund assets in stocks. When the stock market is not good, you should still buy stocks and change positions carefully.

3. It may be because of foreign exchange control restrictions that some QDII funds have foreign exchange quota restrictions, so the maximum purchase limit is set.