Gomez Osorio, Álvaro, Jorge Mario López Pereira, and Anderson Rodríguez Negrete. “IMPACT OF COVID-19 ON OPTIMAL RISK, PROFITABILITY AND PORTFOLIOS AMONG COLCAP INDEX STOCKS”. Semestre Económico 26, no. 61 (December 21, 2023): 1–24. Accessed May 7, 2026. https://revistas.udem.edu.co/index.php/economico/article/view/4312.