Preparing for the Society of Actuaries (SOA) Exam CT4, which focuses on stochastic processes, can be a daunting task. However, understanding how to apply regularity conditions is crucial for success. Regularity conditions are essentially rules that ensure the mathematical models we use are well-behaved and predictable. In stochastic processes, these conditions help us analyze and predict the behavior of random variables over time. If you’re like many students, you might find the terminology and concepts overwhelming at first, but trust me, once you grasp the basics, it becomes much more manageable.