Whilst the use of event portfolios as a multipurpose policy tool is increasing worldwide, academic attention on this phenomenon remains sparse. In response, the purpose of this review paper is to identify the major issues in the use of portfolios by host communities and destinations aspiring to become eventful and delineate the emergent development patterns and strategies. The paper postulates the core dynamics that can enable capacitybuilding in event portfolio development and suggests a network framework for setting up a holistic portfolio policy with systemic management properties. This framework provides a theoretical scaffolding to contextualize the first formalized city portfolio strategies. Based on this discussion, four major issues are identified: portfolio configurations, leveraging, sustainability, and community capacity-building. Policy implications are drawn that theorize the surfacing portfolio development models, design logics and strategic approaches. The effects on social structures are considered in terms of how they determine the longevity, legitimation, and institutional embeddedness of event portfolios. The paper proffers that event portfolios represent a multi-dimensional phenomenon and highly versatile policy tool with manifold configurations. Their sustainable growth requires a shift in event-tourism thinking from the hitherto focus on single major events to managing multiple events for achieving multiple purposes.