Comportamento das ações dos principais players brasileiros de saúde durante a pandemia de COVID-19

Abstract

This research investigates the impact of the COVID-19 pandemic on the supplementary healthcare sector in Brazil, focusing on analyzing the changes that occurred in the market during the crisis. The main objective is to compare the performance of shares in the supplementary healthcare sector with the market during the pandemic period. Using descriptive analysis and non-parametric correlation, the study evaluates the observed effects, analyzing the history of closing prices of four companies in the sector between January 1, 2018 and August 31, 2023. The study uses the log-return and two indicators of risk – the Sharpe and Beta index. In addition, statistical data and sectoral reports are considered. The literature review suggests that crises can negatively affect the value of a company. The results reveal a significant impact of the pandemic on stock prices, with critical periods of the crisis negatively affecting asset risk.