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Sensitivity of Stock Returns Volatility and Money Market Rates: Insight from Nigeria Aleke, Stephen Friday; Obidike, Paul C.; Okeke, Frankline C. S. A.; Echeonwu, Sandra Ijeoma; Emineke, Kalu O.
Talaa : Journal of Islamic Finance Vol. 2 No. 1: June 2022
Publisher : Department of Sharia Financial Management, Institut Agama Islam Negeri Sultan Amai Gorontalo, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (607.084 KB) | DOI: 10.54045/talaa.v2i1.385

Abstract

The study focused on how money market factors affected the stock returnfluctuations in the Nigerian setting. The study specifically looked at the impact of Treasury bill rates and monetary policy rates on the return fluctuations in Nigeria from2002 - 2016 over the study period. Financial econometrics study was performed using descriptive statistics, unit root test, heteroscedasticity, autocorrelation, GARCH (1.1), and GARCH-X (1.1) models. The series' stationarity was confirmed using the PP test and the Equally Augmented Dickey-Fuller (ADF) test. Additionally, a Benchmark GARCH (1.1) model was estimated to study the volatility. A diagnostic test was run using the Ljung-Box Q-Statistics to determine the robustness of the calculated GARCH model. The overall finding indicated that there was significant volatility clustering that was still present in the Nigerian exchange group, suggesting that it would take some time for the market's reaction to volatility shocks from the prior period to be completely eliminated. The study also discovered that changes in treasury bill rates and monetary policy rates significantly reduce the volatility of returns on the stock in Nigeria, supporting the idea that there is an inverse link between the value of money and the value of capital markets.
Climate Change Risk Disclosures and Stock Market Returns: Empirical Evidence from Nigeria Aleke, Stephen Friday; IREM, COLLINS OKECHUKWU; ozo, Friday Kennedy; Ogbu , Friday Edeh Ogbu,; Okeke, Frankline C. S. A; Committee, Ekpete
The International Journal of Accounting and Business Society Vol. 33 No. 1 (2025): IJABS
Publisher : Accounting Department,

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ijabs.2025.33.1.819

Abstract

Purpose — This study aims to examine the effect of climate change risk disclosure on stock market performance in Nigeria from 2006 to 2022 Design/methodology/approach — The study adopted an ex post facto research design and the Vector Error Correction Model (VECM) to estimate the regression coefficients. As the dependent variable, the stock market performance was proxied by the all-share index. In contrast, the climate change policy was proxied by carbon emission taxes (CET) and solid mineral mining taxes (SMT). Other determinant of stock market performance such as the federal government green bond (FGBond) was added to the model to mirror the macroeconomic and financial environment. Findings — From the analysis results, the model test of stationarity showed that all the variables were not stationary at the level but at first difference 1(1). The descriptive and normality tests indicated that the data were normal and fit for the intended analysis. The study found evidence of a long-run relationship among the model variables based on the Johansen test for cointegration. The vector error correction indicated a fast speed of adjustment from the short run to the long run at about 32.04% annually, from the system equation regression. However, the significant findings of the study are: carbon emission taxes had significant positive impact on the stock market performance in Nigeria, (coefficient: LOGCET = 1.085279, p-value 0.0221); solid mineral mining tax has significant positive impact on the stock market performance in Nigeria, (coefficient: LOGSMMT = 0.619464, p-value = 0.0009); and Federal government green bond has significant positive impact on the stock market performance in Nigeria. (Coefficient: LOGFGBond = 0.934925, p-value of 0.0000). Implications—This study's policy implications are that risk mitigation efforts such as carbon emission and solid mineral taxes, as well as green bonds targeting climate change, will remain a practical component of stock market performance policies. Originality/value—Many researchers and policy-makers believe that access to climate change risk mitigation in developing countries improves stock market returns while reducing market vulnerability and contributing to overall economic growth. This approach has expanded rapidly and widely over the past several decades and is currently used in several growing African states. Paper type — Empirical Research