Stock portfolio management consists of defining how some investment resources should be allocated to a set of stocks. It is an important component in the functioning of modern societies throughout the world. However, it faces important theoretical and practical challenges. The contribution of this work is two-fold: first, to describe an approach that comprehensively addresses the main activities carried out by practitioners during portfolio management (price forecasting, stock selection and portfolio optimization) and, second, to consider uptrends and downtrends in prices. Both aspects are relevant for practitioners but, to the best of our knowledge, the literature does not have an approach addressing them together. We propose to do it by exploiting various computational intelligence techniques. The assessment of the proposal shows that further improvements to the procedure are obtained when considering downtrends and that the procedure allows obtaining portfolios with better returns than those produced by the considered benchmarks. These results indicate that practitioners should consider the proposed procedure as a complement to their current methodologies in managing stock portfolios.

Two multicriteria-sorting methods that generalize the relational paradigm have been recently presented in the literature. One uses objects representative of classes, the other uses objects in the limiting boundaries of classes; both can use either a reflexive or an asymmetric preference relation. However, defining the parameters of relation-based methods is not straightforward. The present work operationalizes those methods with a methodology that takes examples provided by the decision-maker and, using an accuracy measure that specifically fits the characteristics of the methods, exploits an evolutionary algorithm to determine the parameters that best reproduce such examples. The assessment of the proposal showed that (i) it can achieve considerably high levels of out-of-sample effectiveness with only a few decision examples; (ii) the inference process is more effective learning the parameters of the method based on representative objects; (iii) it tends to be more effective with a reflexive relation; (iv) the effectiveness decreases while increasing the number of classes, which is not always the case when increasing the number of criteria. Theoretical properties of the proposed methodology will be investigated in future works.

Sustainable finance requires decision-support tools capable of integrating financial indicators with environmental and social risk factors in a transparent and data-driven manner. This study introduces a hierarchical multi-criteria sorting approach for the evaluation of electricity generation technologies, aimed at informing capital allocation and investment screening decisions. The framework relies exclusively on quantitative criteria obtained from public datasets and organizes them into a structured hierarchy encompassing economic performance, technical reliability, system relevance, and environmental and health impacts. Interval-valued evaluations and preference parameters are employed to represent uncertainty and heterogeneity in financial decision contexts. The resulting range-based classifications distinguish technologies according to their overall acceptability from a sustainable finance perspective. Results for the U.S. electricity sector highlight the ability of the approach to support responsible investment decisions under multiple, potentially conflicting financial and sustainability considerations.