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Abstract(s)
A dissertação presente analisar os determinantes internos e externos que influenciam
a rentabilidade bancária em Portugal. Para isso, foi recolhida uma amostra semestral dos
cinco principais bancos no período 2005 a 2023.
Através da estimação de regressões em painel foi possível obter resultados que
apontam que as variáveis escolhidas explicam uma grande parte da variância da
rentabilidade, principalmente o rácio Return on Assets (ROA) calculado com Earnings
Before Taxes a dividir pelo total dos Ativos (EBT/Ativos). As varáveis internas como a
eficiência operacional, adequação de capital e a qualidade do ativo revelaram-se
estatisticamente significativas para todos os modelos analisados o que demonstra o impacto
relevante destas variáveis. Já os seus coeficientes sugerem uma relação negativa com a
rentabilidade, enquanto que no caso da diversificação e do risco de crédito, apresentaram um
impacto inesperado, isto é, negativo no caso da diversificação e positivo no caso do risco de
crédito.
This dissertation analyzes the internal and external determinants that influence bank profitability in Portugal. To do this, a six-monthly sample of the five main banks was taken from 2005 to 2023. Using panel regression technique to estimate, it was possible to obtain results showing that the variables chosen explain a large part of the variance in profitability, mainly the Return on Assets (ROA) ratio calculated using Earnings Before Taxes divided by Total Assets (EBT/Assets). Internal variables such as operating efficiency, capital adequacy and asset quality proved to be statistically significant for all the models analyzed, which demonstrates the relevant impact of these variables. Their coefficients suggest a negative relationship with profitability, while in the case of diversification and credit risk, they had an unexpected impact, i.e. negative in the case of diversification and positive in the case of credit risk.
This dissertation analyzes the internal and external determinants that influence bank profitability in Portugal. To do this, a six-monthly sample of the five main banks was taken from 2005 to 2023. Using panel regression technique to estimate, it was possible to obtain results showing that the variables chosen explain a large part of the variance in profitability, mainly the Return on Assets (ROA) ratio calculated using Earnings Before Taxes divided by Total Assets (EBT/Assets). Internal variables such as operating efficiency, capital adequacy and asset quality proved to be statistically significant for all the models analyzed, which demonstrates the relevant impact of these variables. Their coefficients suggest a negative relationship with profitability, while in the case of diversification and credit risk, they had an unexpected impact, i.e. negative in the case of diversification and positive in the case of credit risk.
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Keywords
Rentabilidade Sistema bancário português Determinantes da rentabilidade Dados em painel Profitability Portuguese banking system Determinants of profitability Panel data