Hello, the performance of the fund is affected by the management level of the fund manager, the fund scale, the fund rate and other factors.

For example, when the constituent stocks of Shanghai and Shenzhen 300 change, the reaction speed of each fund manager is different. For example, according to the index adjustment notice, buy the constituent stocks in advance, or sell the constituent stocks that will be eliminated in advance.

Just like copying homework. The handwriting is different. Some people copy well, while others even make mistakes. Therefore, an error will occur when tracking the same index. If you have other questions, you can click on my avatar to add attention, which is more convenient to find me ~