It doesn't matter! ETF funds can be purchased over the counter. ETF fund is a transactional open index fund. It is a fund that tracks and invests in indexes. It combines the advantages of closed-end funds and open-end funds, and can buy and sell ETFs on exchanges or buy or redeem them from fund companies.

However, the threshold of ETF subscription and redemption is relatively high and the funds are relatively large. Many of them have to change stocks, and they can't buy them directly in cash. For ordinary investors, it is more convenient to buy OTC ETF linked funds.