"The minimum change unit of the declared price" refers to the minimum unit of each price fluctuation. This minimum unit is fixed, but this "fixed" value can be decided by yourself.

For example, this stock 10 yuan, some people want to sell it, others want to buy it, and it will go up and down. It cannot be said that one person offers 10. 1 yuan, and another person offers 10.05438+0 yuan. This is not good. In order to unify the quotation, for example, it must be a multiple of 0. 1 yuan, then we can only quote 10. 1. 10.2, and so on. This is the minimum quotation unit.