Geometric Brownian Motion

Assumption

⎊ The fundamental premise of Geometric Brownian Motion is that the logarithmic returns of the asset price follow a random walk, implying asset prices remain positive and exhibit log-normal distribution. This stochastic process incorporates both a deterministic drift component and a random diffusion component proportional to the current price level. While foundational for many options models, this assumption often requires adjustment for the idiosyncratic jumps seen in cryptocurrency markets.