Pricing of mortgage‐backed securities with option‐adjusted spread

Notes the increasing importance of option‐adjusted spread analysis for pricing in the mortgage‐backed securities market and develops a partial differentiation equation method (PDE) for calculation, as an alternative to the Monte Carlo method. Discusses the mathematical theory involved and illustrates its use with a numerical example. Claims PDE is more accurate and cheaper than the Monte Carlo method and promises a further article on using it for horizon analysis and risk management.