No, index funds are listed on the exchange. As long as they don't close their positions and withdraw from the market, they can keep trading. There is no time limit. There are two profitable ways for investors to invest in ETF funds: one is to earn the difference by selling at a high price and sucking at a low price, and the other is to hold it for a long time and make profits through fund dividends.

At present, some ETF funds in the A-share market can be T+0, but the ETF funds related to A-share stocks can only be T+ 1. At present, there are several types of ETF funds that can conduct T+0 trading: overseas ETF, bond ETF, currency ETF, gold ETF and crude oil ETF.