What you said is existence. In the process of firm offer operation, the market's reaction to some news, because the influence degree or nature of the news is different, some are aimed at the near future, some are aimed at the long term, and all kinds of situations are possible, whether positive or negative, in the variety of agricultural products and in the case of seasonal natural attributes of production!

Whether there is arbitrage space on the firm offer depends on the general situation. In the case of changes in production technology and consumption structure, the space without arbitrage will also change, but it will not change in the short term!

If there is arbitrage space, there will be funds to arbitrage in the market, which is also called "risk-free arbitrage"! This arbitrage operation. It will squeeze out the temporary distortion or arbitrage space of the market and let the market return to the arbitrage-free situation!