Papers by Nurul Sima Mohamad Shariff
Universiti Teknologi MARA, 2021
The existence of market anomalies for the return reveals the inefficiency in the market that coul... more The existence of market anomalies for the return reveals the inefficiency in the market that could affect investor investment strategy, portfolio selection, and profit management. It is due to the unpredictable movement of the stock market return that will affect the decision of investors later. As such, this study intends to investigate day of the week effect, a month of the year effect, and a quarter of the year effect on the Malaysian Stock Exchange, namely the Kuala Lumpur Composite Index (KLCI) on data from 2nd January of 2015 until 31st December 2018. Based on the findings from Generalized Autoregressive Conditional Heteroskedasticity (GARCH) model analysis, it is found that the daily effect on returns was insignificant. Possible reasons for the insignificant return could be due to the lack of time-series data. However, the significant monthly effect on returns of May, November, and December while the quarterly effect on the returns is found significant in the first quarter. This study also concludes that volatility shock is persistent in the returns for all those three market anomalies.
Journal of Modern Applied Statistical Methods
Problems arise in testing the stationarity of the panel in the presence of cross sectional depend... more Problems arise in testing the stationarity of the panel in the presence of cross sectional dependence and outliers. The currently available panel unit root tests are very much affected by the presence of outliers. As such, this article introduces an alternative test which is robust to outliers and cross sectional dependence. The performance and robustness of the proposed test is discussed and comparisons are made to the existing tests via simulation studies.
We investigate the mean reversion in real exchange rates for Central and Eastern European countri... more We investigate the mean reversion in real exchange rates for Central and Eastern European countries. We use point and confidence interval estimates from the Phillips et al.'s (2001) local-persistent model as our preferred measures of the persistence of real exchange rates. We find that the adjustment to purchasing power parity is more rapid after accounting for structural breaks, with half-life deviation from parity below 18 months, which is consistent with the explanation based on nominal rigidities. The estimated narrow confidence intervals for the half-lives invalidate the purchasing power parity puzzle for transition and some core European Union countries. The novelty of our results lies in the finding of strong evidence for purchasing power parity as the local-persistent model produces shorter half-lives and much narrower corresponding confidence intervals than those obtained by standard Dickey-Fuller and local-to-unity models. Our evidence for PPP suggests that the transition countries have maintained their long-run competitiveness against their trading partners.
Uploads
Papers by Nurul Sima Mohamad Shariff