Stephan Winkler spent some days at the Department of Physics and Mathematics of the University of Alcalá de Henares. Together with Prof. Bonifacio Castaño he worked on prognosis models for stocks, indices and trading rules optimization implemented in HeuristicLab; in cooperation with Prof. J. Rafael Sendra he also researched on the optimization of polynomials using evolutionary algorithms. We look forward to seeing the results of this work in the future in the form of joint research articles and project proposals!