# Tag Info

There is probably nothing wrong with your code although I did not check it in Mathematica. Normally, Geometric Brownian motion is just a model. Here, you simulate lots of paths and then average over it. The first plot gives something like $$E(S_t) = S_0*\exp(\mu t)$$ with $S_0$ the initial stock price. However, because of the simulation, you do not get ...