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A study on the impact of the first federal funds interest rate hike since the global financial crisis on market expectations and risk preferences

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This empirical study analyses the impact of the first federal funds interest rate hike since the last global financial crisis. Using a mixture of lognormal, generalised beta of the second kind and lognormal-polynomial distributions, it is estimated risk-neutral densities on S&P 500 options. The mixture of lognormal presents the best fit. Descriptive statistics are used to make comparisons, which shows a decrease in the means of the distributions and an increase in uncertainty after the event. It is estimated the representative investor’s constant relative risk aversion using a power-utility function on expected utility and rank-dependent expected utility models, and it is found a positive risk premium for the year of 2015.
Este estudo empírico analisa o impacto do primeiro aumento da taxa de juro do Federal Reserve desde a crise financiera de 2008. Através de distribuições mixture of lognormal, generalised beta of the second kind e lognormal-polynomial, são estimadas risk-neutral densities usando opções do índice S&P 500. A mixture of lognormal apresenta-se como o método mais adequado e com maior ajuste às observações. Estatística descritivas são estimadas para aferir comparações, concluindo-se que depois do evento as médias das distribuições diminuem e a incerteza aumenta. É estimado o coeficiente de aversão ao risco do investifor representativo usando a função power-utility nos modelos expected utility e rank-dependent expected utility, e conclui-se que no ano 2015 existe um prémio de risco positivo no índice S&P 500.

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