heavy-tailed
[/ˈhɛvi teɪld/]
adjective
de cauda pesada
1. In statistics and probability theory, describing a probability distribution with a tail that decays more slowly than an exponential distribution, meaning extreme values occur with higher probability than in normal distributions
The stock market returns follow a heavy-tailed distribution, explaining why extreme crashes occur more frequently than predicted by normal distribution models.
Os retornos do mercado de ações seguem uma distribuição de cauda pesada, explicando por que crashes extremos ocorrem com mais frequência do que previsto por modelos de distribuição normal.
2. Characterized by or prone to producing outliers and extreme events; exhibiting fat tails in data
Financial data is often heavy-tailed, making risk assessment more complex than traditional methods assume.
Os dados financeiros geralmente têm cauda pesada, tornando a avaliação de risco mais complexa do que os métodos tradicionais assumem.
This is a specialized technical term used primarily in academic and financial contexts in both English and Portuguese-speaking countries. It gained prominence in finance and risk management after the 2008 financial crisis, when the inadequacy of normal distribution assumptions became apparent. The term is used identically in Brazil, Portugal, and English-speaking countries within technical and academic communities.
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