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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Constru????o de um ??ndice de dividendos para an??lise de bolhas racionais no mercado de a????es brasileiro

Ribeiro, Jussara 10 March 2016 (has links)
Submitted by Sara Ribeiro (sara.ribeiro@ucb.br) on 2017-04-20T12:47:20Z No. of bitstreams: 1 JussaraRibeiroDissertacao2016.pdf: 1633683 bytes, checksum: bc56d87d5073ee0367b3355ccad9bf94 (MD5) / Approved for entry into archive by Sara Ribeiro (sara.ribeiro@ucb.br) on 2017-04-20T12:47:41Z (GMT) No. of bitstreams: 1 JussaraRibeiroDissertacao2016.pdf: 1633683 bytes, checksum: bc56d87d5073ee0367b3355ccad9bf94 (MD5) / Made available in DSpace on 2017-04-20T12:47:41Z (GMT). No. of bitstreams: 1 JussaraRibeiroDissertacao2016.pdf: 1633683 bytes, checksum: bc56d87d5073ee0367b3355ccad9bf94 (MD5) Previous issue date: 2016-03-10 / The existence of bubbles in stock markets can be detected by analyzing the relationship between stock prices and dividends. In Brazil, several studies use the Bovespa index as a proxy for stock prices, but differ in the index used as a proxy for dividends paid in the country. There are studies that create a monthly dividend index based on the theoretical portfolio and on the methodology of the Bovespa index. However, this dividend index has periods of great instability due to high concentration in the participation of some shares in the index. The objective of this study was to create an index that represents the dividend distribution in the Brazilian stock market using series provided by the Central Bank and the IBGE. The dividend index showed a smoother behavior, without periods of great instability or breaks. It was used as a proxy of the dividends in tests to verify the presence of bubbles. Three types of rational bubbles were studied: explosive bubbles, periodically collapsing bubbles and intrinsic bubbles. The tests results indicated that it is not possible to rule out the presence of explosive bubbles and detected evidences of the presence of periodically collapsing bubbles in the Brazilian stock market in this period. However, no evidence of the presence of intrinsic bubbles was found. / A presen??a de bolhas no mercado de a????es pode ser detectada por meio da an??lise da rela????o existente entre os pre??os das a????es e seus dividendos. Na literatura brasileira, diversos trabalhos utilizam o ??ndice Bovespa como proxy dos pre??os, mas diferem quanto ao ??ndice utilizado como proxy dos dividendos distribu??dos no pa??s. H?? trabalhos que constroem um ??ndice de dividendos mensal baseado nas carteiras te??ricas e na metodologia do Ibovespa. Por??m, tal ??ndice apresenta per??odos de grande instabilidade decorrentes da concentra????o na participa????o de determinadas a????es no ??ndice. Diante disso, o objetivo do presente trabalho foi construir um ??ndice que represente a distribui????o de dividendos no mercado acion??rio brasileiro a partir de s??ries fornecidas pelo Banco Central e pelo IBGE, tendo como refer??ncia a Lei das Sociedades por A????es. O ??ndice constru??do apresentou um comportamento mais suave, sem per??odos de grande instabilidade ou quebras. Ele foi, ent??o, utilizado como proxy dos dividendos em testes para verificar a presen??a de bolhas no mercado de a????es. Tr??s tipos de bolhas racionais foram estudados: bolhas explosivas, bolhas que estouram periodicamente e bolhas intr??nsecas. Os resultados dos testes indicaram que n??o ?? poss??vel descartar a presen??a de bolhas explosivas e detectaram ind??cios da presen??a de bolhas que estouram periodicamente no mercado de a????es brasileiro no per??odo analisado. N??o foram encontrados, por??m, ind??cios da presen??a de bolhas intr??nsecas nesse mercado.

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