First of all, ETF funds are index funds. It tracks the index and buys any constituent stocks it buys. It is a passive index fund, so it has nothing to do with the fund manager.

In addition, ETF is an industry fund, but industry funds are also composed of stocks, so this stock portfolio is still selected by the fund manager. Finally, this income of this fund is related to the investment style of the fund manager and some of his personal abilities.