Abstract
The research aims to provide a deep and comprehensive picture of the theoretical frameworks and empirical studies that dealt with diagnosing the impact of some macroeconomic variables on the development of the financial sector, in addition to exploring an objective quantitative model that can monitor the nature, size, and direction of this effect and explain its mechanism and channels of transmission. By adopting the methodology of aggregate regression models (PRM), fixed effect (FEM), and random effect (REM) that are based on the Balanced Panel Data, for the GCC countries for the period (2005-2017). The results of the assessment revealed the participation of the trade openness variable in its positive impact on the three indicators of financial sector development, (BC) which expresses the bank credit granted to the private sector as a percentage of GDP, (TD) which indicates the bank's concentration (the percentage of bank assets that It is held by the first three banks) and (SPV) which reflects market fluctuations, while the inflation variable (INF) exerted a negative effect on (BC), (TD) and (IS), finally, the growth variable (GRO), which negatively affected ( BC)
