THE INFLUENCE OF COVID-19 EVENTS TO VACCINATION ON ABNORMAL RETURN AND TRADING VOLUME ACTIVITY IN IDX30 COMPANIES. Journal of Applied Business and Technology, [S. l.], v. 2, n. 3, p. 183–193, 2021. DOI: 10.35145/jabt.v2i3.75. Disponível em: https://www.e-jabt.org/index.php/JABT/article/view/75. Acesso em: 2 mar. 2026.