Recently, many friends who have just entered the cryptocurrency industry have asked me: I often hear people talk about the term ETF, what exactly is ETF? I have organized it and explained in the simplest terms what ETF is? ETF is a trading open-end index fund, commonly known as an exchange traded fund, which is a type of open-end fund listed and traded on an exchange with variable fund shares. Investors can purchase ETFs in two ways: after the securities market closes, they can buy from the fund manager based on the fund's net asset value on that day. It is also possible to purchase directly from other investors in the securities market, and the purchase price is jointly determined by the buyer and seller. This is ETF, do you understand?