The amount of delivery applied by the spot dealer to the exchange.

According to the regulations of the exchange, if you want to enter the futures market,

If you sell the spot, you need to submit an application, pay a deposit (the deposit is not the same as usual), and return the deposit after inspection. If you don't put it in storage, the deposit will not be refunded. This measure is to prevent spot traders from falsely reporting the delivery volume and affecting the market.

Generally speaking, the larger the stock, the lower the price.