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Successful animal systems often manage risk through synchronous behavior that spontaneously arises without leadership. In critical human systems facing risk, such as financial markets or military operations, our understanding of the benefits associated with synchronicity is nascent but promising. Building on previous work illuminating commonalities between ecological and human systems, we compare the activity patterns of individual financial traders with the simultaneous activity of other traders—an individual and spontaneous characteristic we call synchronous trading. Additionally, we examine the association of synchronous trading with individual performance and communication patterns. Analyzing empirical data on day traders' second-to-second trading and instant messaging, we find that the higher the traders' synchronous trading is, the less likely they are to lose money at the end of the day. We also find that the daily instant messaging patterns of traders are closely associated with their level of synchronous trading. This result suggests that synchronicity and vanguard technology may help traders cope with risky decisions in complex systems and may furnish unique prospects for achieving collective and individual goals.

14 páginas.-- 4 figuras.-- 1 tabla.-- 100 referencias.-- Supplemental information associated with this article can be found, in the online version, at https://doi.org/10.1016/j.tree.2018.01.007 ; We propose to integrate niche and network theories into a single framework. This integration is possible through the strong parallelisms of concepts and methodologies of both theories. Feasibility and stability conditions are the key concepts that can allow the integration. How species interactions across trophic levels fulfill feasibility and stability conditions is yet to be discovered. The quest for understanding how species interactions modulate diversity has progressed by theoretical and empirical advances following niche and network theories. Yet, niche studies have been limited to describe coexistence within tropic levels despite incorporating information about multi-trophic interactions. Network approaches could address this limitation, but they have ignored the structure of species interactions within trophic levels. Here we call for the integration of niche and network theories to reach new frontiers of knowledge exploring how interactions within and across trophic levels promote species coexistence. This integration is possible due to the strong parallelisms in the historical development, ecological concepts, and associated mathematical tools of both theories. We provide a guideline to integrate this framework with observational and experimental studies. ; Comments from three anonymous reviewers greatly improve the quality of this paper, which is the result of a collaborative project funded by the Spanish Ministry of Economy and Competitiveness (LINCX, CGL2014-61590-EXP). OG acknowledges postdoctoral financial support provided by the Spanish Ministry of Economy and Competitiveness (JCI-2012-12061) and by the European Union Horizon 2020 research and innovation program under the Marie Sklodowska- Curie grant agreement No 661118-BioFUNC.SS alsoacknowledges support from MIT Research Committee Funds and the Mitsui Chair. Wefinally thank Phylopic.com and Melissa Broussard for providing silhouette images of plants and pollinators. ; Peer reviewed