Cox-Ingersoll-Ross Model

Framework

The Cox-Ingersoll-Ross (CIR) model is a mathematical framework used in quantitative finance to describe the evolution of interest rates over time. It is a single-factor model that assumes interest rates follow a square-root process, preventing them from becoming negative. This model captures mean reversion, implying that interest rates tend to revert to a long-term average. It is a cornerstone for pricing interest rate derivatives. The CIR model provides a stochastic differential equation for rate dynamics.