I'm kind of glad I leveled up the computer now. I have the second level of the stock market.

Level 1 has a max increase of 1.5x (5 minute cooldown)
Level 2 has a max increase of 2.25x (15 minute cooldown)
Level 3 has a max increase of 7.55x and I'm guessing anywhere from a 30 minute to 1 hour cooldown.