Uh i been playing since the 90s on DOS lol. I was a bored kid who loved reading the financial section of the newspaper.

You don't really need to know the laws. the game just tells you you can't do that if you try to do something like make a merger monopoly. There are tax considerations that can be tricky but I mostly ignore those. You get taxed on profits so you dont need to min max taxes to be successful in the game.

Uhh and yeah im constantly doing research and looking things up in the game, which i mean that's really what investing is IMHO. It's essentially a textbased game, you have to read a lot, even if it's mostly numbers/percentages. The modern rework on steam has a much prettier layout and more charts graphs.