>>/41077/
I'm an amateur and have never played Football manager games either so take what I say with a grain of salt but anyway.
I guess it depends because there are two aspects to the stock market that sometimes overlap but not always. You have the real world company and it's operations and you have patterns on the share market. Many traders don't need to know about a company at all, they just look at patterns and act on those, this is particularly common for day traders and to some extend swing traders, day traders just check what shares are moving the most in the morning and then stare at a screen for hours watching for movements of the share price and when they expect the share is about to move in a certain direction based on patterns, swing trading is like this but has more of a basis in the real world as it's not just happening over one morning so can be impacted by global events. A game like football manager might have similar patterns and strategies that might help with this.
The other aspect is the real world company itself, and that takes much more research and knowledge about the global economy and the company itself but this is more for long term investment or for spotting opportunities to invest in a company that is cheap now but about to explode.