Risco do desvio da perda: uma alternativa à mensuração do risco

• Ano de defesa: 2015
• Autor(a) principal: Righi, Marcelo Brutti
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• dARK ID: ark:/26339/001300000nq77
• Idioma: por
• Instituição de defesa: Universidade Federal de Santa Maria; BR; Administração; UFSM; Programa de Pós-Graduação em Administração
• Palavras-chave em Português: Risco do desvio da perda; Gestão de risco; Medidas de risco; Medidas coerentes de risco; Medidas de desvio generalizado; Shortfall deviation risk; Risk management; Risk measures; Coherent risk measures; Generalized deviation measures; CNPQ::CIENCIAS SOCIAIS APLICADAS::ADMINISTRACAO
• Link de acesso: http://repositorio.ufsm.br/handle/1/3143

We present the Shortfall Deviation Risk (SDR), a risk measure that represents the expected loss of results that occur with certain probability penalized by the dispersion of results worse than such expectation. The SDR combines the Expected Shortfall (ES) and the Shortfall Deviation (SD), which we also introduce, contemplating the two fundamental pillars of the risk concept the probability of adverse events (ES) and the variability of an expectation (SD) and considers extreme results. We demonstrate that the SD is a generalized deviation measure, whereas the SDR is a coherent risk measure. We achieve the dual representation of the SDR, and we discuss issues such as its representation by a weighted ES, acceptance sets, convexity, continuity and the relationship with stochastic dominance. Illustrations using Monte Carlo simulation and real data indicate that the SDR offers greater protection to measure risk than other measures, especially in turbulent times.