Answer by admnvk for Why is there a lot of focus on derivatives pricing and much less on stock pricing?

I think the comment provided by nbbo2 answers your question fairly well and is pointing in the right direction. To make the answer more concrete, it's important to note that unlike with other types of assets, derivative prices in the Black-Scholes world are driven mainly by changes in the price of the underlying. This means that the randomness of the underlying asset (described by the typical Brownian motion term) drives both the price changes in the asset itself and in the derivative price. Thi