Assistant Professor Dr. Iftikhar Jabbar Abed, “ANALYSIS OF RETURN AND RISK ACCORDING IN THE INVESTMENT PORTFOLIO STYLE: AN ANALYTICAL STUDY OF A SAMPLE OF IRAQI BANKS IN THE IRAQI STOCK EXCHANGE FOR THE PERIOD (2016-2020)”, Wor.econo. and fin. Bul., vol. 32, pp. 194-202, Mar. 2024.