If so, then how would that work? Because once you start the mission and figure out which stocks/companies are involved, you cant switch characters to invest as all three, and can you even invest as Franklin while currently in the mission? So the only way to know beforehand is to use a guide or start the mission and figure out which companies to invest in, and then quit it so you can invest as all three characters, but that doesn't seem like they made it like that on purpose because it kind of messes up the flow. But as far as I know, there's no other way to buy the golf course.
So how did rockstar intend us to use the stock market without using guides or starting and then quitting missions? How are we supposed to know what we should buy or sell from the point in the beginning where Lester texts Michael saying "now might be a good time to start investing in the stock market"
I ask because I'm trying to do a fully "canon" playthrough where I do everything "as the developer intended" So I dont want to start and quit and start again with any missions as that would f*ck with the flow, and Id rather not use any guides. So how are we supposed to know just by playing the game normally?