“Modern” and “Post-Modern”? Portfolio Theory and performance of Mexican stock market sectorial indexes. Panorama Económico, [S. l.], v. 17, n. 34, p. 9–38, 2021. DOI: 10.29201/peipn.v17i34.78. Disponível em: https://revistapanoramaeconomico.mx/index.php/PE/article/view/78. Acesso em: 27 mar. 2026.