Systems and methods are provided to model financial transactions. According to some embodiments, simple events, branch events, composite events, and/or contingent events associated with a financial transaction are defined. The events may then be used to automatically manage the transaction during the transaction's lifecycle. In one embodiment, at least one simple event associated with an asset transfer is defined, including a transfer amount and a transfer date. At least one branch event associated with a set of simple events is also defined, including a branch date and a branch selector. In addition, at least one composite event associated with a plurality of the simple events or branch events is defined. The transaction may then be automatically managed during the transaction's lifecycle based at least in part on the simple events, the branch events, and the composite events.