There have been such cases, such as agricultural futures. Because of the shelf life, if the warehouse receipt in the delivery warehouse is about to expire (it can be sold to the spot market, but it can't be delivered), the spot merchants holding the warehouse receipt will throw it out as much as possible, resulting in a sharp drop in prices, even falling in recent months.

However, due to factors such as planting and season, traders think that the price is low and there may be a daily limit. However, such extreme events rarely occur and are not representative. Especially in the case of few traders, the far-month contract can easily be labeled as a price limit.