2015
DOI: 10.15194/jofi_2015.v1.i2.16
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Há Efeito Manada em Ações com Alta Liquidez do Mercado Brasileiro?

Abstract: Purpose: This work aims to verify the herd behavior in both liquid stocks of Brazilian stock exchange, i.e. Petrobras and Vale.Methodology: This work uses the methods of Christie and Huang (1995) and price pressure with high frequency data to detect the herd behavior between 2010 and 2014.Findings: The first method suggest that there are no signs of herd behavior using 30 minutes intervals data. However, there is evidence of price pressure for the sample with all intraday data.Originality: Herd behavior studie… Show more

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Cited by 3 publications
(3 citation statements)
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“…As can be seen in Table 4, in periods of high volatility the β2 coefficient is negative and significant, indicating the presence of herd effect. These results corroborate the study by Silva, Barbedo and Araújo (2015), who stated that this phenomenon is commonly associated with periods of greater volatility and is attributed to the human component in asset trading. On the other hand, in the periods of low volatility presented in Table 5, the coefficient β2 is positive, which rejects the existence of the herd effect.…”
Section: Herding Effect and Volatilitysupporting
confidence: 92%
See 1 more Smart Citation
“…As can be seen in Table 4, in periods of high volatility the β2 coefficient is negative and significant, indicating the presence of herd effect. These results corroborate the study by Silva, Barbedo and Araújo (2015), who stated that this phenomenon is commonly associated with periods of greater volatility and is attributed to the human component in asset trading. On the other hand, in the periods of low volatility presented in Table 5, the coefficient β2 is positive, which rejects the existence of the herd effect.…”
Section: Herding Effect and Volatilitysupporting
confidence: 92%
“…This bias is defined by Barnejee (1992) as the act of trying to use the information contained in the decisions made by others, even when one´s private information suggests doing something quite different. Silva, Barbedo and Araújo (2015) define herding as the behavior of a group of investors who engage in the trading of a certain asset in the same direction and abandon their previous beliefs in relation to that asset. Araújo Neto et al (2016) investigated whether people with knowledge of finance and accounting were subject to external influences in trading financial assets and did not find this effect.…”
Section: Introductionmentioning
confidence: 99%
“…Outro tema discutido sobre o comportamento dos tomadores de decisões é o 'efeito manada', que vai de encontro à hipótese de que os preços se movimentam por um passeio aleatório. Para Silva et al (2015), o 'efeito manada' ocorre quando um grupo de investidores negocia o mesmo ativo, na mesma direção do mercado, em certo período, ignorando suas próprias informações e crenças a respeito dos preços. Esse comportamento ou movimento de grupo é normalmente associado a movimentos exagerados de mercado, tais como, períodos de altas exageradas com compras frenéticas de ações (bolhas), ou de queda (crises), movidos por ganância e medo, respectivamente (BAKER et al, 2007).…”
Section: Revisão Teóricaunclassified