Diffusion Processes 1
This text explores ideas related to diffusion processes, specifically highlighting the roles of the scale function and speed density. We focus on an Ornstein–Uhlenbeck model as a framework for answering practical questions about the behavior of a stochastic process—such as a trading strategy—including when it may exit a predefined region and where optimal entry and exit points might lie. To illustrate these concepts, we present a simplified pairs trading example, demonstrating how the theoretical components translate into actionable insights.
Diffusion processes, Ornstein-Uhlenbeck, Scale function, Speed density.
































