The reason why there is no trading day in American stock market. According to relevant public information, Guangfa Dow Jones Oil Index Fund has suspended its related business since July 4, 2022, and its funds are temporarily unable to subscribe. Index fund is a fund product that takes a specific index (such as Shanghai and Shenzhen 300 Index, Standard & Poor's 500 Index, NASDAQ 100 Index and Nikkei 225 Index) as the target index, takes the constituent stocks of the index as the investment object, builds a portfolio by purchasing all or part of the constituent stocks of the index, and tracks the performance of the target index.