Purpose - This paper aims to identify if there is an impact of the rating announcements issued by the agencies on the returns of the stocks of Brazilian companies listed on Brasil Bolsa Balcão, from August 2002 to August 2018, identifying which types of announcement (upgrade, downgrade or the...

Purpose This study aims to evaluate the presence of abnormal returns due to stock splits or reverse stock splits in the Brazilian capital market context. Design/methodology/approach The event study technique was used on data from 518 events that occurred in a 30-year period (1987-2016),...

This paper investigates the impact of the Russia-Ukraine conflict on the stock market efficiency of six developed countries. The sample is composed of daily stock index data from USA, UK, Germany, France, Italy and Spain. Market efficiency was analyzed by the multifractal structure of the series...