How does the stock market work in this game?

[Why you Banh Mi??]

Is it tied to the missions you do, is it random, or is it real time and the same stock market is a representation of what players are actually buying and selling?

[Chibbity]

A. It fluctuates in real time, but is not based on any other players in any way; afaik.

B. Some missions can affect it, yes. Pay attention to briefings that mention certain company names.

C. There is also quite a bit of randomness involved, yes.

[Danielle]

Yes, it is tied to the missions you do. An example would be.. Let's say you own stocks from company A. And if your mission description states you're going to kill the CEO of company A, then that company's stocks will crash after that mission.

It is real time while you're in game. Whether on mission or in the menu, it constantly moves. There is a certain item that makes this simulated stock market go.. "Faster" if that's an explanation for it.

No, other players do not affect the market, or the game you play in any way. And there's also a lot of randomness.