Just curious regarding SP dynamics - I hold some mid cap miners...

Just curious regarding SP dynamics - I hold some mid cap miners like Millenium, Silver Lake and Ramelius, there are fluid gains and losses that depend on market factors eg: a few percent each day up or down.

I also hold RED and WPG, smaller caps with very low sales volumes and not much deviations around the share price from day to day eg: no change today despite increase in POG.

Can anyone explain the difference in the SP dynamic? Is this a reflection of the size of the company or something else?

Cheers