Shanghai and Shenzhen 300 index futures force the futures price to converge to the spot price by setting the delivery settlement price as the arithmetic average price of all index points in the last two hours of the last trading day of the Shanghai and Shenzhen 300 index.

The settlement price of futures delivery and the price of spot 300 will converge, but it does not mean that it will be a number. Convergence means that there is no arbitrage space in the futures spot market when delivery costs and all other capital costs are included.