A more thorough explanation:

Definition: A mover is a stock that experiences significant market price changes, making it a very unstable stock. It can also refer to a movant.

• Stock A has been a mover in the market, with its price fluctuating wildly over the past few weeks.
• The movant, or the person who initiates a legal action, is referred to as the mover.

The first example illustrates how a stock can be considered a mover if it experiences significant market price changes. This can be due to various factors such as company news, economic conditions, or investor sentiment. The second example shows how the term mover can also refer to a legal term, specifically the person who initiates a legal action.