Multi-Segment Curves

Definition

Multi-segment curves refer to piecewise linear or non-linear functions utilized in financial engineering to interpolate the volatility surface or interest rate term structure across discrete strikes and maturities. These models segment a continuous curve into distinct intervals, where each segment adheres to specific mathematical constraints to maintain consistency and arbitrage-free conditions. Quantitative analysts employ these structures to approximate complex market surfaces where a single global function fails to capture localized anomalies in options pricing.