Analysis of the Determinants of Capital Adequacy Ratio: The Case of Full-Fledged Islamic Banks in the Gulf Cooperation Council (GCC)

Keywords: Capital adequacy ratio, full-fledged Islamic banks, Gulf Cooperation Council.


This study empirically analyzes bank-level and macroeconomic factors that have impact on the capital adequacy ratio (CAR) of the full-fledged Islamic banks in the Gulf Cooperation Council (GCC) and how they influence the banks’ capitalization decisions. This study covers a six years period ranging from 2013 to 2018. CAR ratio is a key stability indicator that measures the capability of banks to absorb unforeseen losses. To conduct the analysis, secondary data gathered from the annual financial reports of the banks as well from international economic database are used. Using multiple linear regression model, the effect of return on assets (ROA), return on equity (ROE), financing to deposit ratio (FDR), operating expense to operating income (OEOI), bank size (SIZE), non-performing financing (NPF) as bank-specific explanatory variables and economic growth (GDP) and inflation (INF) as a proxy for macroeconomic explanatory variables on the CAR of the banks are studied. Due to multicollinearity issues, ROA is dropped. As a result of the regression analysis, OEO and FDR are observed to positively and strongly impact CAR of the examined banks while SIZE is found to have negative and significant effect. ROE, NPF, GDP and INF demonstrated insignificant influences on the banks’ CAR. This study reveals varying and significant under and over regulatory capitalization decisions across the banks. Additionally, extreme expenditures and financial losses suffered by some banks are also discovered.

Author Biography

Abdilatif Mao Ali, Sakarya University

I am a postgraduate who is currently pursuing his masters degree in the field of Islamic economics and finance. In my undergraduate studies, I have focused my interest on accounting and finance - a field that I adore. I have always been a serious learner and managed to achieve significant grades throughout my academic years.
I am really interested in researching the financial aspects of the Islamic financial systems and hope to have a lasting contributions into the field. I 


F. Alqahtani and D. G. Mayes, “Financial stability of Islamic banking and the global financial crisis: Evidence from the Gulf Cooperation Council,” Economic Systems, vol. 42(2), pp. 346–360, 2018.

F. Alqahtani, “Islamic Banking and the Global Financial Crisis: Evidence from the Gulf Cooperation Council,” University of Auckland, 2016.

M. D. Miah and H. Uddin, “Efficiency and stability: A comparative study between islamic and conventional banks in GCC countries,” Future Business Journal, vol. 3(2), pp. 172–185, 2017.

N. Arshed, S. Riaz, T. M. Khan, and O. Aziz, “Financial Disintermediation and Profitability of Global Islamic Banks,” European Journal of Islamic Finance, (7), pp. 1–12, 2017.

P. P. Biancone and M. Radwan, “European Companies: Evaluation For Sharia Compliance ‘Opportunities And Challenges,’” European Journal of Islamic Finance, (5), pp. 1–8, 2016.

P. Abedifar, P. Giudici, and S. Q. Hashem, “Heterogeneous market structure and systemic risk: Evidence from dual banking systems,” Journal of Financial Stability, vol. 33(February), pp. 96–119, 2017.

A. Estrella, S. Park, and S. Peristiani, “Capital ratios as predictors of bank failure,” Federal Reserve Bank of New York Economic Policy Review, (July), pp. 33–52, 2000.

P. Salgotra and R. Wadhwa, “Capital adequacy-A financial soundness indicator for banks: A comparative analysis of public banks in India,” IOSR Journal of Business and Management, vol. 54, pp. 54–60, 2012.

BCBS, “Finalising Basel III in brief,” 2018.

KPMG, “GCC Listed Banks’ Results,” 2019.

M. O. Al-Hares and K. Saleem, “Islamic banks financial performance and implications of Basel III standards in the GCC: An empirical analysis,” Review of Economics & Finance, vol. 7, pp. 80–97, 2017.

S. Louati, I. Gargouri Abida, and Y. Boujelbene, “Capital adequacy implications on Islamic and non-Islamic bank’s behavior: Does market power matter?,” Borsa Istanbul Review, vol. 15(3), pp. 192–204, 2015.

IMF, “Gulf Cooperation Council countries (GCC): How developed and inclusive are financial systems in the GCC?,” 2018.

The World Bank, “Islamic Finance Bulletin,” 2018.

R. Basu, A. Prasad, and S. Rodriguez, “Monetary Operations and Islamic Banking in the GCC: Challenges and Options,” 2015.

T. Reuters, “State of the Global Islamic Economy Report 2018/19,” Dubai, 2018.

ICD-THOMSON REUTERS, “Islamic Finance Development Report 2017: Towards Sustainability,” 2017.

IFSB, “Islamic Financial Services Industry: Stability Report,” 2018.

R. Wilson, “The Development of Islamic Finance in The GCC,” 2009.

R. Mohd. Yusof and M. Bahlous, “Islamic banking and economic growth in GCC & East Asia countries: A panel cointegration analysis,” Journal of Islamic Accounting and Business Research, vol. 4(2), pp. 151–172, 2013.

N. Işık, “Growth, Islamic Banking and Schumpeterian Vision: An empırıcal evidence from the Gulf Arab States,” International Journal of Islamic Economics and Finance Studies (JISEF), vol. 4(1), pp. 40–55, 2018.

GCC-Stat, “Economic Performance and Outlook for the Gulf Corporation Council (GCC) 2018,” Muscat, 2018.

F. A. Surow, “The Effects of Micro Economic Variables on the Financial Performance of Islamic Banks in kenya,” University of Nairobi, 2014.

A. Hadjixenophontos and C. Christodoulou-volos, “Financial crisis and capital adequacy ratio : A case study for Cypriot commercial banks,” Journal of Applied Finance & Banking, vol. 8(3), pp. 87–109, 2018.

T. X. T. Pham and N. A. Nguyen, “The determinants of capital adequacy ratio: The case of the Vietnamese banking system in the period 2011-2015,” VNU Journal of Science: Economics and Business, vol. 33(2), pp. 49–58, 2017.

Mursal, Darwanis, and R. Ibrahim, “What influences capital adequacy ratio in Islamic commercial banks ? Evidence from Indonesia,” Journal of Accounting Research, Organization and Economics, vol. 2(1), pp. 1–10, 2019.

M. Sutrisno, “Factors determinant of bank capital buffer: empirical study on Islamic rural banking in Indonesia,” Advances in Social Science, Education and Humanities Research (ASSEHR), vol. 186(15), pp. 84–87, 2018.

A. J. Mohammed, “Measuring the Determinants of Capital Adequacy and Its Impact on Efficiency in the Banking Industry: A Comparative Analysis of Islamic and Conventional Banks,” University of Bolton, 2018.

A. M. Hewaidy and H. Y. Alyousef, “Bank-Specific and Macroeconomic Determinants of Capital Adequacy Ratio : Evidence from Kuwaiti Banks,” European Journal of Economics, Finance and Administrative Sciences, (99), pp. 5–20, 2018.

H. Ayub and A. Javeed, “Impact and Implications of Capital Adequacy Ratio on the Financing Behaviour: Evidence from Islamic Banks in Pakistan,” Journal of Islamic Business and Management, vol. 6(1), pp. 19–40, 2016.

M. Valipour Pasha, “Analysis of the capital adequacy ratio and nonperforming loans relationship in the banking network of Iran,” Journal of Money and Economy, vol. 9(3), pp. 59–83, 2015.

L. Bateni, H. Vakilifard, and F. Asghari, “The influential factors on capital adequacy ratio in Iranian Banks,” International Journal of Economics and Finance, vol. 6(11), pp. 108–116, 2014.

T. Asma and K. Khadidja, “Determinants of capital adequacy ratio in Malaysia Islamic Banks (A panel data analysis),” International Research Journal of Finance and Economics, (129), pp. 55–63, 2015.

O. A. El-Ansary and Ha. M. Hafez, “Determinants of capital adequacy ratio: An empirical study on Egyptian banks,” Corporate Ownership & Control, vol. 13(1), pp. 806–816, 2015.

M. T. Abusharba, I. Triyuwono, M. Ismail, and A. F. Rahman, “Determinants of capital adequacy ratio (CAR) in Indonesian Islamic commercial banks,” Global review of accounting and finance, vol. 4(1), pp. 139–170, 2013.

O. D. Apuke, “Quantitative research methods : A synopsis approach,” Kuwait Chapter of Arabian Journal of Business and Management Review, vol. 6(11), pp. 40–47, 2017.

B. Žmuk, I. D. Lutilsky, and M. Dragija, “The choice of a sampling procedure for a (too) small target population: The case of Croatian public hospitals,” Zbornik Ekonomskog fakulteta u Zagrebu, godina, vol. 14(2), pp. 19–44, 2016.

CBK, “Kuwaiti Banks,” Central Bank of Kuwait, 2019. [Online]. Available: [Accessed: 13-Jul-2019].

CBO, “Oman’s Financial System,” Central Bank of Oman, 2019. [Online]. Available: [Accessed: 13-Jul-2019].

QCB, “Registration,” Qatar Central Bank, 2019. [Online]. Available: [Accessed: 13-Jul-2019].

SAMA, “Saudi Banks,” Saudi Arabian Monetary Bank, 2019. [Online]. Available: [Accessed: 13-Jul-2019].

CBB, “Fact Sheet,” Central Bank of Bahrain, 2019. [Online]. Available: [Accessed: 13-Jul-2019].

CBUAE, “Commercial Banks,” Central Bank of the UAE, 2019. [Online]. Available: [Accessed: 13-Jul-2019].

N. Joshi, “A Quantitative Study of the Impact of Social Media Reviews on Brand Perception,” The City University of New York, 2015.

D. C. Jupiter, “A variety of variables,” Journal of Foot and Ankle Surgery, vol. 53(1), pp. 124–125, 2014.

BCBS, “Basel III: A global regulatory framework for more resilient banks and banking systems,” 2010.

J. L. Saragih, “The effects of Return On Assets (ROA), Return On Equity (ROE), and Debt To Equity Ratio (DER) orn stock eturns in wholesale and retail trade companies listed in Indonesia stock exchange,” International Journal of Sciene and Research Methodology, vol. 8(3), pp. 348–367, 2018.

G. Paudel and S. Khanal, “Determinants of Capital Adequacy Ratio (CAR) in Nepalese cooperative societies,” Ssrn, pp. 1–20, 2015.

F. Sufian, “Determinants of bank profitability in a developing economy: Empirical evidence from the china banking sector,” Asian Academy of Management Journal of Accounting and Finance, vol. 4(2), pp. 91–112, 2008.

S. Javaid and S. Alalawi, “Performance and profitability of Islamic banks in Saudi Arabia: An empirical analysis,” Asian Economic and Financial Review, vol. 8(1), pp. 38–51, 2018.

AAOIFI, “Statement of Financial Accounting No . 1 Conceptual Framework for Financial Reporting by Islamic Financial Institutions.”

J. Lotto, “The empirical analysis of the impact of bank capital regulations on operating efficiency,” International Journal of Financial Studies, vol. 6(34), pp. 1–11, 2018.

A. Iqbal, “Liquidity risk management : A comparative study betwen conventional and islamic banks of Pakistan,” Global Journal of Management and Business Research, vol. 12(5), pp. 54–64, 2012.

A. A. Saddiq, “Capital Adequacy of Banks in Ghana : Does Liquidity Transformation Matter,” University of Ghana, 2017.

H. E. Akbas, “Determinants of bank profitability : An investigation on Turkish banking sector,” Öneri Dergisi, vol. 10(37), pp. 103–110, 2012.

L. Laeven, L. Ratnovski, and H. Tong, “Bank size, capital requirements, and systemic risk: Some international evidence,” Journal of Banking & Finance, vol. 1(69), pp. 25–34, 2016.

J. De Haan and T. Poghosyan, “Bank Size, Market Concentration, and Bank Earnings Volatility in the US,” 2011.

M. Indriastuti and L. M. Ifada, “The Effect of Non-Performing Financing on Sharia BPR Performance,” Advances in Social Science, Education and Humanities Research, vol. 140, pp. 152–154, 2019.

F. N. Raniah, Khairunnisa, and D. N. Triyanto, “The influence of capital adequacy ratio (car), non performing financing (npf), and profit sharing ratio to profit sharing financing sharia bank,” The 7 Smart Collaboration for Business in Technology and Information Industries 2016, pp. 87–92, 2016.

S. Ye Ekström and I. Kanaporyte, “The Determinants of Capital Structure: A Comparison of Listed Large Capitalization Non-Financial Companies in the USA and Sweden,” Lund University, 2015.

D. Alper and A. Anbar, “Bank specific and macroeconomic determinants of commercial bank profitability: Empirical evidence from Turkey,” Business and Economics Research Journal, vol. 2(2), pp. 139–152, 2011.

M. Labonte, “Inflation: Causes, Costs, and Current Status,” 2011.

A. Ghasemi and S. Zahediasl, “Normality tests for statistical analysis: A guide for non-statisticians,” International Journal of Endocrinology and Metabolism, vol. 10(2), pp. 486–489, 2012.

D. Gujarati, Basic Econometrics, 4th ed. New York: McGraw-Hill, 2004.

H. Yang, “Visual assessment of residual plots in multiple linear regression: A model-based simulation perspective,” Multiple Linear Regression Viewpoints, vol. 38(2), pp. 24–37, 2012.

D. Gujarati, Econometrics By Example, 1st ed. New York: Palgrave Macmillan, 2011.

M. M Mukaka, “Statistics corner: A guide to appropriate use of correlation coefficient in medical research,” Malawi Medical Journal, vol. 24(3), pp. 69–71, 2012.

A. Bell, M. Fairbrother, and K. Jones, “Fixed and random effects models: making an informed choice,” Quality and Quantity, vol. 53(2), pp. 1051–1074, 2019.

E. A. Mohammed, C. Naugler, and B. H. Far, “Emerging Business Intelligence Framework for a Clinical Laboratory Through Big Data Analytics,” in Emerging Trends in Computational Biology, Bioinformatics, and Systems Biology, 1st ed., Elsevier, 2015, pp. 577–602.

R. Ahmad, M. Ariff, and M. J. Skully, “The determinants of bank capital ratios in a developing economy,” Asia-Pacific financial markets, vol. 15(3–4), pp. 255–272, 2008.

P. K. Aspal and A. Nazneen, “An empirical analysis of capital adequacy in the Indian private sector banks,” American Journal of Research Communication, vol. 2(11). pp. 28–42, 2014.

S. Rahman, “A Comparative Study of Stability & Consumer Confidence between Islamic & Conventional Banks in Bangladesh,” European Journal of Islamic Finance, vol. 0(13), pp. 1–9, 2019.

Yolanda, “Capital adequacy ratio and its influencing factors on the Islamic banking in Indonesia,” Ikonomika: Journal Of Islamic economics and Business, vol. 2(2), pp. 162–176, 2017.

J. Pek, O. Wong, and C. M. Wong, “Data Transformations for Inference with Linear Regression: Clarifications and Recommendations,” Practical Assessment, Research and Evaluation, vol. 22(9), pp. 1–11, 2017.

How to Cite
Ali, A. M. (2019). Analysis of the Determinants of Capital Adequacy Ratio: The Case of Full-Fledged Islamic Banks in the Gulf Cooperation Council (GCC). European Journal of Islamic Finance, (14).