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David Umoru

Publications (10)

Seasonality Effects, Stock Exchange and Foreign Exchange Markets: Comparative Analysis of Volatility Behavior During Covid-19

David Umoru, Timothy Igbafe Aliu & Beauty Igbinovia · Asian Journal of Economics, Business and Accounting · 2024

This study investigated the effects of seasonality on stock exchange and foreign exchange markets of two WAMZ and two BRICS countries which include Nigeria, Ghana, and Brazil and China. The Auto Regressive Integrated Moving Average (ARIMA) regression approach and the Markov-regim...

Open access Research Article 10.9734/ajeba/2024/v24i91498

Dynamics of Foreign Exchange Rates and Bitcoin Trading Prices

David Umoru, Beauty Igbinovia, Isah Aisha Shaibu & Muhammed Adamu Obomeghie · Asian Journal of Economics, Business and Accounting · 2024

The study examined the volatility of Bitcoin prices and volatility of exchange rates of oil-producing countries. The study used ARIMA, GARCH estimators for analysis. The study found ARCH effects in the data (heterskedasticity test; p<.05). The GARCH results laid credence to a...

Open access Research Article 10.9734/ajeba/2024/v24i81467

Volatility Behaviour of Currency Exchange Rates in Selected Countries: Long Memory Effect

David Umoru, Anthony A. Ekeoba & Beauty Igbinovia · Asian Journal of Economics, Business and Accounting · 2024

In financial econometrics, models of long memory, such as ARFIMA models, are compared to short memory models, such as ARIMA models. Given that the researchers were empirically desirous of determining the volatility behaviour of exchange rate returns on African currencies in excha...

Open access Research Article 10.9734/ajeba/2024/v24i81449

Between Exchange Rate Returns and Crude Oil Returns in Oil-Importing Countries

David Umoru, Kelvin Ogbeifun & Beauty Igbinovia · Asian Journal of Economics, Business and Accounting · 2024

Fluctuations in the financial markets stem from the reactions of investors to both market activities and more wide-ranging macroeconomic indices. This research examines the interconnectivity between returns on exchange rates and crude oil prices for ten oil-importing countries. Q...

Open access Research Article 10.9734/ajeba/2024/v24i81440

Causes of Exchange Rate Volatility

David Umoru, Oghenevwodo Naphtali Akpoviroro & Solomon Edem Effiong · Asian Journal of Economics, Business and Accounting · 2023

This study examined the determinants of exchange rate volatility basing evidence on 7 African countries; Niger, Sudan, Cameron, Equatorial Guinea, Tunisia, Congo, and Cote D’Ivoire from 1990-2023. The study conducted the Autoregressive Distributive Lag (ARDL) bounds testing for c...

Open access Research Article 10.9734/ajeba/2023/v23i201091

Factors Responsible for Movements in Real Effective Exchange Rate of Selected African Countries

David Umoru, Hillary Oritsesholaye Abugewa-Ejegi & Solomon Edem Effiong · Asian Journal of Economics, Business and Accounting · 2023

The study examined the determinants of real effective exchange rate on selected African countries, namely, Nigeria, Libya, Angola, Egypt, Gabon, Ghana, and Chad over the sample period of 1980 to 2023. The vector error correction methodology was used in the study. The results sugg...

Open access Research Article 10.9734/ajeba/2023/v23i191088

Exchange Rate Regimes, Import Prices and Foreign Reserve Holdings in Africa

David Umoru, Muhammed Adamu Obomeghie & Kasim Eshemogie · Asian Journal of Economics, Business and Accounting · 2022

In this study, we examined dynamic interaction between exchange rate regimes, import prices and foreign reserve holdings in developing countries. Monthly data for the study were obtained on five African countries from 1980M1 to 2020M12. Recognizing that our sample of nations may...

Open access Research Article 10.9734/ajeba/2022/v22i2230725

Saving in Presence of Volatilities in Interest Rate and Exchange Rate Devaluation

Umoru, David, Tedunjaiye, Oluwatoyin Dorcas, David Umoru & Oluwatoyin Dorcas Tedunjaiye · Asian Journal of Economics, Business and Accounting · 2023

Many developing countries have rationalized their economies in response to the liberalization of financial markets giving renewed concerns to the role of exchange rate management and interest rate deregulation. The study examined the effects of interest rate volatility and exchan...

Open access Research Article 10.9734/ajeba/2023/v23i211121

Stock Returns and State-Dependent Effects of Changes in Exchange Rate and Money Supply from Central Banks

Solomon Edem Effiong, Odion Jonah Benson & David Umoru · Asian Journal of Economics, Business and Accounting · 2023

This study investigates the state-dependent effects of exchange rate movements and money supply shocks on stock market returns using daily stock returns, exchange rate, and variations in money supply data obtained from the databank.worldbank.org website from 1990 to 2022. The sto...

Open access Research Article 10.9734/ajeba/2023/v23i181062

Reactions of Stock Prices to Changes in Exchange Rate and Monetary Policy Rate of Central Banking System: Symmetry or Asymmetry

Solomon Edem Effiong, Odion Jonah Benson & David Umoru · Asian Journal of Economics, Business and Accounting · 2023

This study examines the reactions of stock prices to variations in the monetary policy rate of the central banks and exchange rate shock, which is if the responses are similar or differ in a comparative analysis between developed and emerging stock markets. Data were obtained on...

Open access Research Article 10.9734/ajeba/2023/v23i181061