?pwd=1234 Withdrawal code: 1234 Index Fund, as the name implies, is based on specific indexes (such as CSI 300 Index, S&P 500 Index, Nasdaq 100 Index, Nikkei 225 Index, etc.) as the underlying index, and uses the constituent stocks of the index as investment objects, building an investment portfolio by purchasing all or part of the constituent stocks of the index to track the performance of the underlying index