ECTAP
 
HomeDespre ECTAEventsPolitica editorialaTrimite un articolParteneri / link-uri utileArchiveAbonamentContact
 

ISSN 1841-8678   (print)
ISSN 1844-0029   (online)

News

Archive ECTAP

Note: for the period 1994-2003 the archive of the magazine will not be available online

Supplements ECTAP

If you cannot open the pdf file you need Adobe Reader.
download Adobe Reader

Creative Commons License

Theoretical and Applied Economics
No. 5 / 2012 (570)

Using Garch-in-Mean Model to Investigate Volatility and Persistence at Different Frequencies for Bucharest Stock Exchange during 1997-2012

Iulian PANAIT
Bucharest Academy of Economic Studies
Ecaterina Oana SLĂVESCU
Bucharest Academy of Economic Studies

Abstract. In our paper we use data mining to compare the volatility structure of high (daily) and low (weekly, monthly) frequencies for seven Romanian companies traded on Bucharest Stock Exchange and three market indices, during 1997-2012. For each of the 10 time series and three frequencies we fit a GARCH-in-mean model and we find that persistency is more present in the daily returns as compared with the weekly and monthly series. On the other hand, the GARCH-in-mean failed to confirm (on our data) the theoretical hypothesis that an increase in volatility leads to a rise in future returns, mainly because the variance coefficient from the mean equation of the model was not statistically significant for most of the time series analyzed and on most of the frequencies. The diagnosis that we ran in order the verify the goodness of fit for the model showed that GARCH-in-mean was well fitted on the weekly and monthly time series but behaved less well on the daily time series.

Keywords: stock returns; volatility; persistence; GARCH model; emerging markets; data mining.

Download the full article:  

Contents

The Consensus of Hierarchy
Marin Dinu

Open acces

ECTAP

Search

BOOKS

The Economicity. The Epistemic Landscape, Marin Dinu, 2016

Partners


ISSN 1841-8678 (ediția print) / ISSN 1844-0029 (ediția online)
© Copyright Asociația Generală a Economiștilor din România (AGER) / General Association of Economists From Romania  (GAER)
Redacția: 010702, București, Calea Griviței nr. 21, sector 1, E-mail: economia.ta@edeconomica.com

© 2006-2019 AGER