Gonçalves da Silva CA. Impacts of Covid-19 Pandemic and Persistence of Volatility in the Returns of the Brazilian Stock Exchange: An Application of the Markov Regime Switching GARCH (MRS-GARCH) Model. IJAEFA [Internet]. 2020 Dec. 15 [cited 2024 Apr. 25];8(2):62-7. Available from: http://onlineacademicpress.com/index.php/IJAEFA/article/view/349