Resumen: We examine whether the Fama and French (1992) (F&F;) model can be adapted to become a more versatile and flexible tool, capable of incorporating variations of company characteristics in a more dynamic form. For this, the risk factors are reconstructed at the end of each reading of monthly data. We argue that, over time, the evaluation of a company may change as a result of variations in its market price, size or book price, and we are aware that the F&F; model does not accurately reflect these dynamics. Our results show that the adapted model is able to capture the behaviour of a greater number of stocks than the original F&F; model and risk factors are more significant when building them through our procedure. In addition, we carry out these adaptations during a period of instability in financial markets. Idioma: Inglés DOI: 10.1080/13504851.2016.1192266 Año: 2017 Publicado en: APPLIED ECONOMICS LETTERS 24, 5 (2017), 342-345 ISSN: 1350-4851 Factor impacto JCR: 0.504 (2017) Categ. JCR: ECONOMICS rank: 298 / 353 = 0.844 (2017) - Q4 - T3 Factor impacto SCIMAGO: 0.327 - Economics and Econometrics (Q3)