Risco, Retorno e Equilíbrio na Bolsa de Valores Portuguesa
Abstract
Os mercados financeiros são eficientes quando existe uma relação positiva entre o risco e o retorno esperado. As hipóteses subjacentes a esta eficiência dizem que, quando toda a informação é disponibilizada, os preços dos títulos respondem imediatamente, sendo isso benéfico para os investidores. Esta investigação incidiu sobre a Bolsa de Valores Portuguesa e recorreu à metodologia proposta por Fama & Macbeth (1973). Os resultados sugerem que o PSI Geral não é eficiente (i. e., não existe auto-regulação), na medida em que os preços dos títulos não refletem instantaneamente toda a informação disponibilizada e que existem fatores externos que influenciam os preços dos títulos.
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Portuguese Journal of Finance, Management and Accounting
e-ISSN: 2183-3826
DOI: 10.54663/2183-3826
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