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COVID-19 INFLUENCE OVER BRAZILIAN AGRICULTURAL COMMODITIES AND DOLLAR–REAL EXCHANGE

2022; World Scientific; Volume: 30; Issue: 06 Linguagem: Inglês

10.1142/s0218348x22501006

1793-6543

Kerolly Kedma Felix do Nascimento, Fábio Sandro dos Santos, Kellyma Kellyashin Félix do Nascimento, Kenikywaynne Kerowaynne Félix do Nascimento, Sílvio Fernando Alves Xavier Júnior, Jader da Silva Jale, Tiago A. E. Ferreira,

COVID-19 epidemiological studies

This study evaluates the Brazilian agricultural commodities market and the dollar–real exchange price variation using the multifractal detrended fluctuations analysis methodology. We investigated the period from January 1, 2019 to September 25, 2019, outside the COVID-19 pandemic, and from January 1, 2020 to September 25, 2020, during the COVID-19 pandemic. We verified the fluctuations of commodities and dollar–real exchange prices during the pandemic caused by COVID-19 showed a record price. The results of Hurst exponent and multifractal parameters [Formula: see text], [Formula: see text], and [Formula: see text] indicate that during the COVID-19 pandemic, sugar was the most efficient commodity, while pork the less one. Compared to the identical months in 2019, the dollar–real exchange was the most efficient market, while ethanol was the least efficient.