A method and a system is disclosed for creating and managing financial instruments, which may be designed to increase the risk-adjusted return of investment portfolios and other collections of assets and/or liabilities. A computer may be used to access databases containing asset information, liability information, counterparty information, metric information, and swap agreement information. Swap information may be received including first counterparty information and first metric information comprising a future cash flow that is at least partially determined by one or more events associated with playing one or more games. A first swap agreement may then be executed. A metric value for the first metric information may be determined and cashflows value to be paid and/or received may be calculated. The calculated cashflows value may be exchanged.