Answer 1: The biggest difference between the settlement price of stock index futures and commodity futures (taking Dashang as an example) is that although the settlement price of commodity futures is the weighted average price of all transaction prices in the first ten trading days of the matching date (including the matching date), it still depends on the capital scale of the commodity futures market, and the settlement price of stock index futures depends on the strength of the number of constituent stocks held by long-term funds and short investors in the securities market. Before the last trading day of stock index futures, the funds in the futures market can be turned upside down in theory, and the daily closing price can be controlled with sufficient funds (indirectly affecting the daily settlement price). However, when entering the last trading day, the decision-making power of the delivery settlement price is determined by the financial strength of the whole stock market, that is, the substantial difference between the delivery settlement price and the daily settlement price.