Beginning with work conducted for the Electric Power Research Institute (EPRI), Brattle has developed a suite of software tools for valuation and risk management of electric and gas commodities and physical supply. These tools provide a system for participants in the energy industry to apply risk-neutral valuation methods widely used in financial services to structured and standard wholesale energy contracts; to energy portfolio risk measurement and modifications (including extensive capabilities for simulation of hedging costs and policies); and to valuation and management of physical generation resources with common but complex features such as start costs, non-linear heat rate curves, and embedded retirement options.