ANALYSIS OF PRE- AND POST-ANNOUNCEMENT DIFFERENCES IN MERGERS AND ACQUISITIONS ON ABNORMAL RETURNS AND TRADING VOLUME ACTIVITY (A Study of Companies Listed on the Indonesia Stock Exchange, 2020-2024). Proceeding of International Conference on Economics, Technology, Management, Accounting, Education, and Social Science (ICETEA), [S. l.], v. 2, p. 1039–1051, 2026. Disponível em: https://conference.unita.ac.id/index.php/icetea/article/view/847. Acesso em: 11 oct. 2026.