Battal, Ahmed Hussein, and Enas Shakir Majid. “The Relationship Between Return and Risk for Some Constituent Sectors in the Iraqi Stock Market: An Analytical Study for the Period (2015-2019)”. Tikrit Journal of Administrative and Economic Sciences, vol. 17, no. 56, 4, Dec. 2021, pp. 270-84, doi:10.25130/tjaes.17.56.4.16.