Please use this identifier to cite or link to this item: https://hdl.handle.net/10419/195198 
Year of Publication: 
2017
Citation: 
[Journal:] SPOUDAI - Journal of Economics and Business [ISSN:] 2241-424X [Volume:] 67 [Issue:] 3 [Publisher:] University of Piraeus [Place:] Piraeus [Year:] 2017 [Pages:] 3-17
Publisher: 
University of Piraeus, Piraeus
Abstract: 
This paper examines the effect of foreign exchange news announcements on the volatility of stock returns in Nigeria, using the daily closing All-Share Index from The Nigerian Stock Exchange from 2000 to 2015. We extended existing literature by augmenting the EGARCH econometric model with exchange news announcements to specify both the conditional mean and volatility equations. The empirical results revealed a positive and significant effect of exchange news announcements on stock market volatility in Nigeria under symmetric conditional variance. However, there was strong evidence of asymmetric effect with negative exchange news which caused volatility to rise more following a large price rise than following a price fall of the same magnitude. The total impact of bad news had more distabilising effect on volatility than good news. The sum of ARCH and GARCH coefficients (» + Ø = 0.9) is approximately close to unity - indicating strong evidence of volatility persistence in the Nigerian stock market.
Subjects: 
volatility
stock returns
exchange news
asymmetric
volatility persistence
JEL: 
C22
C58
G12
Document Type: 
Article

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