ETF-linked funds refer to funds that invest most of their assets in tracking the same underlying index, that is, invest in ETF funds (referred to as target ETFs), closely track the performance of the underlying index, pursue the minimization of tracking deviation and tracking error, and adopt an open operation mode.

Three types of investment scope of ETF linked funds: portfolio securities that track the same underlying index (that is, target ETF); Constituent stocks and alternative constituent stocks of the underlying index; Other securities as stipulated by China Securities Regulatory Commission. At the same time, among ETF-linked fund properties, the target ETF shall not be less than 90% of the fund's net asset value.

It is more similar to the enhanced index fund. 90% of the fund assets are used for investment and tracking index, and 10% of the fund assets strengthen the income through active management.