PERANGINANGIN, A. P. Integrating Machine Learning into Portfolio Optimization: A Hybrid ARIMA–GARCH Predictive Model with Genetic Algorithm. International Journal of Community Service (IJCS), [S. l.], v. 5, n. 1, p. 124–137, 2026. DOI: 10.55299/ijcs.v5i1.1824. Disponível em: https://ejournal.ipinternasional.com/index.php/ijcs/article/view/1824. Acesso em: 9 sep. 2026.