QIN, Mingyu. Empirical Research on Daily Direction Prediction of S&P 500 ETF Based on Machine Learning and Multivariate Technical Indicators. Exploring Science Academic Conference Series, [S. l.], v. 16, p. 412–420, 2026. DOI: 10.70267/aitia.2026412420. Disponível em: https://journals.zeuspress.org/index.php/conference/article/view/1343. Acesso em: 14 sep. 2026.