Why do many futures contracts close for a few days?
In order to facilitate the analysis, futures analysis software will generally display the contracts of the same month in different years.
Corn futures contract 09 1 1 is a new contract +0 1 newly listed and traded in June 2008. At the same time, contract 08 1 1 is delisted due, which is displayed in contract 08 1 1, so there is a gap on the K-line diagram.