I've been thinking about this problem. Although the delivery cost is a bit high, it's not that high. The contract of 15 12 will be delivered soon, and no one wants the price of 1700. They all went to the market to buy more than 2,000 cash.

But now the positions of 15 12 have not decreased, and the bulls seem to be receiving goods. If the position has not decreased by the last trading day, it is a multi-position receipt.

This short-selling attitude should slow down, and the 160 1 contract may rise.