Hahahaha- Love the idea, and a nice multiboard. It's clear you know how to use the variables and math/arithmatic triggers

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The game is fun; but it gets pretty repetitious. I suggest slowing down how fast the stocks refresh by about 2 seconds... It can get hard to manage with a lot of stocks.
Your math is *prefect* as far as I can tell, all integers seem to be correctly worked. Bravo!
I would say that the brown bag spawns a bit too much for my taste. I have been in situations where I would be trying to do somthing and then the paper bag dialog box would interupt me, then I would forget what I was trying to do...

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What would be insanely AWSOME is to have a small room with a few cubicles instead of the guard tower as your office. The room could have peasents just running around aimlessly with a few props. They wouldnt even have to do anything- just having that would make the game sooooo awsome. Try to make an option where you can buy 5 shares at a time, or sell 5 shares at a time, which makes it easier to "day trade".
P.S- Unless you are trying to make people feel like they are under the effects of LSD, I would suggest you reduce the amount of color flashing, also

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3/5 <-- Amazing Idea, impeccable triggering. The controls work well, but are not incrediably convienient. Could use some work (see above), but with it could easily be the next bnet hit! Good job.