TARGET PORTFOLIO TEMPLATES

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for preferred portfolio templates. One of the methods includes identifying a base data structure, the base data structure having nodes, each node of the base data structure having attributes. The method includes generating a dependent data structure based on the base data structure, each node in the base data structure having a corresponding a node in the dependent data structure. The method also includes determining whether to automatically change an attribute of a node in the dependent data structure in response to a change in an attribute of the corresponding node of the base data structure.