Cubic Spline Interpolation

Methodology

Cubic spline interpolation functions as a piecewise cubic polynomial construction that connects discrete data points to generate a smooth, continuous curve. In the landscape of cryptocurrency derivatives, this technique enables the estimation of implied volatility surfaces by linking observable market prices across various strike prices and tenures. Analysts employ this approach to ensure that the transition between known data nodes remains mathematically consistent and differentiable throughout the entire range of the derivative contract.