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Mary I. Akinyemi



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Georgi N. Boshnakov



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165 – Statistics for Business and Financial Markets

Regime Switching Asymmetric-GARCH Models for Estimating Financial Risk in the Nigerian Stock Index

Sponsor: Business and Economic Statistics Section
Keywords: Markov-switching GARCH, Financial Risk, Expected shortfall(ES), Asymmetric-GARCH, value-at-risk (VaR)

Mary I. Akinyemi

Georgi N. Boshnakov

This paper applies various Markov switching asymmetric GARCH models in estimating value-at-risk (VaR) and its coherent complement Expected shortfall(ES) on returns of the Nigerian stock index. This was done by considering a mixture of Student's-t distributions with varying variances over different time and regimes. Single regime asymmetric GARCH models were compared with their Markov switching counterparts. We found that although the Markov switching models were able to adjust for spurious high persistence found in the single regime asymmetric GARCH models. Under relative performance and hypothesis-testing evaluations, the VaR forecasts derived from the Markov-switching GARCH models were not necessarily preferred to their single regime counterparts.

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