The bigger the index fund, the better. There is no upper limit. The more funds you have to operate, the better. However, for some indexes with small market value of underlying stocks, the scale should be controlled within a certain amount. This kind of index is mainly the big data index of Internet development. The newly established fund should not be too big, otherwise it will be difficult to open a position.

If you don't understand, sincerely welcome questions; If I am lucky enough to help you, please adopt in time! thank you