Futures itself has the expected significance. It has a fixed delivery date, and the date before the delivery date can be completely inconsistent with the subject matter, including at least the time cost of a fund. In addition, futures also reflect the market's expectation of future trends through the spot premium.

Of course, the general trend of the two is the same. After all, stock index futures are derivatives of CSI 300, and the final settlement price of futures is determined by CSI 300.

If stock index futures and CSI 300 are exactly the same at all time points, there is no need to exist, which is no different from related ETFs.