Geometric Brownian motion
Continuous stochastic process
Geometric Brownian motion
A geometric Brownian motion (GBM), also known as an exponential Brownian motion, is a continuous-time stochastic process in which the logarithm of the randomly varying quantity follows a Brownian motion with drift. It is an important example of stochastic processes satisfying a stochastic differential equation (SDE); in particular, it is used in mathematical finance to model stock prices in the Black–Scholes model.
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