RT Journal Article T1 A meta-grammatical evolutionary process for portfolio selection and trading A1 Contreras, Iván A1 Hidalgo Pérez, José Ignacio A1 Nuñez-Letamendía, Laura A1 Velasco Cabo, José Manuel AB This study presents the implementation of an automated trading system that uses three critical analyses to determine time-decisions and portfolios for investment. The approach is based on a meta-grammatical evolution methodology that combines technical, fundamental and macroeconomic analysis on a hybrid top-down paradigm. First, the method provides a low-risk portfolio by analyzing countries and industries. Next, aiming to focus on the most robust companies, the system filters the portfolio by analyzing their economic variables. Finally, the system analyzes prices and volumes to optimize investment decisions during a given period. System validation involves a series of experiments in the European financial markets, which are reflected with a data set of over nine hundred companies. The final solutions have been compared with static strategies and other evolutionary implementations and the results show the effectiveness of the proposal. PB Springer YR 2017 FD 2017-04-17 LK https://hdl.handle.net/20.500.14352/117413 UL https://hdl.handle.net/20.500.14352/117413 LA eng NO Contreras, I., Hidalgo, J.I., Nuñez-Letamendía, L. et al. A meta-grammatical evolutionary process for portfolio selection and trading. Genet Program Evolvable Mach 18, 411–431 (2017). https://doi.org/10.1007/s10710-017-9304-1 NO Ministerio de Ciencia, Innovación y Universidades(España) NO Unión Europea NO Agencia per a la Competitivitat de L’Empresa DS Docta Complutense RD 9 abr 2025