etf funds can be traded directly in the exchange. Trading ETFs include trading and redemption, but some ETFs involved in redemption need to open the redemption authority. ExchangeTradedFund (ETF), also known as transactional open-end index fund, index stock fund and exchange traded fund, is an open-end fund listed and traded on the exchange with variable fund share.

ETF funds generally use passive strategy to track the market index of a certain target and invest in portfolio securities corresponding to a specific index, and their fund shares can be purchased, redeemed or listed and traded with portfolio securities.