Heath-Jarrow-Morton Framework

Model

The Heath-Jarrow-Morton framework functions as a comprehensive approach to interest rate modeling by focusing on the evolution of the entire instantaneous forward rate curve. Unlike short-rate models that rely on a single state variable, this architecture tracks the volatility structure of all forward rates simultaneously. It ensures that the no-arbitrage condition is satisfied by imposing specific constraints on the drift of the forward rate processes. This methodology provides a robust foundation for valuing interest rate derivatives where the term structure of volatility is a primary driver.