Index funds, also known as etf funds, are transactional open-ended index funds, and are usually called exchange-traded funds (ETFs). They are open-end funds with variable fund shares listed on the exchange and belong to a special type of open-end funds.

Therefore, index funds can only buy and sell funds in the account after the securities company opens an account.

The so-called index fund in Alipay is not a real index fund, but a related index.