Analysis of the impact of economic crises on the value of shares in Islamic and usurious banks: A comparative study of the performance of the two financial systems in the face of economic fluctuations for the period from 2017 to 2021. JAFS [Internet]. 2025 Dec. 31 [cited 2026 Jul. 19];20(73):303-11. Available from: https://www.jpgiafs.uobaghdad.edu.iq/index.php/JAFS/article/view/2399