Railroad Tycoon 2 had a better market simulation component than Offworld Trading Company, which in my opinion never really came to completion. OTC just doesn't have any depth to the gameplay, or for that matter the game mechanics.

https://en.wikipedia.org/wiki/Railroad_Tycoon_II

How is OpenTTD in comparison? http://www.openttd.org/en/

Do you have any other examples of games which simulate markets well?

I haven't played a game in the longest, mostly because I find it hard to justify the time ... I've been reading lots about economics and finance and if I can get some "experience" to solidify the concepts while still having fun at the same time then what the hell, I wanna do it!!

M.U.L.E. is a old-school classic in this regard.

Looks cool but a bit too old for me :/

I've played that - Offworld Trader Co is seriously a day trader simulation, but with commodities on Mars.