Precious Metals Price Forecast with ARCH Family Models in COVID-19 Pandemic Period . The Economics and Finance Letters, [S. l.], v. 9, n. 1, p. 78–86, 2022. DOI: 10.18488/29.v9i1.3023. Disponível em: https://archive.conscientiabeam.com/index.php/29/article/view/3023. Acesso em: 14 aug. 2026.