Impacto do rompimento da barragem de Brumadinho nas ações das mineradoras Vale, CSN e Gerdau

The study of events search to see how certain event impacts the behavior of a specific variable of three mining companies: In Brazil's recent history, it is possible to highlight two events of high impact and relevance: the breakup of two dams of mining companies in a time span of 4 years. The...

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Bibliographic Details
Published in:RISTI : Revista Ibérica de Sistemas e Tecnologias de Informação 2020-03 (E27), p.261-272
Main Authors: Souza, João Carlos Félix, Cruz, Lucas de Oliveira, Neto, Aldemar de Miranda Motta, Trotti, Rafael Villa, Duarte, Vitor Campos Alves, Souza, João Gabriel de Moraes
Format: Article
Language:Portuguese
Subjects:
Efficient markets
Mining
Securities markets
Online Access:Get full text
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Summary:The study of events search to see how certain event impacts the behavior of a specific variable of three mining companies: In Brazil's recent history, it is possible to highlight two events of high impact and relevance: the breakup of two dams of mining companies in a time span of 4 years. The study found that the breaking of the dam of Brumadinho impacted, with statistical significance, the actions of two of the three companies studied, and there is evidence to support the theory of semiforte of the efficient markets hypothesis. Keywords: Study of events; Brumadinho; Dam; Financial Market.
ISSN:1646-9895