TY - JOUR T1 - Evaluating ESG Sustainability Performance in the Turkish Banking Industry: A Grey LOPCOW-MSD-PIV Approach TT - Türk Bankacılık Sektöründe ESG Sürdürülebilirlik Performansının Değerlendirilmesi: Gri LOPCOW–MSD–PIV Yaklaşımı AU - Tekgün, Berrak PY - 2025 DA - October Y2 - 2025 DO - 10.30784/epfad.1813013 JF - Ekonomi Politika ve Finans Araştırmaları Dergisi JO - EPF Journal PB - Ekonomi ve Finansal Araştırmalar Derneği WT - DergiPark SN - 2587-151X SP - 59 EP - 87 VL - 10 IS - Özel Sayı LA - en AB - This study introduces a novel grey-based multi-criteria decision-making (MCDM) framework designed to assess the Environmental, Social, and Governance (ESG) sustainability performance of banks listed on Borsa İstanbul (BIST). The suggested hybrid grey-based model integrates two objective weighting techniques—Grey Logarithmic Percentage Change-Driven Objective Weighting (G-LOPCOW) and Grey Modified Standard Deviation (G-MSD)—with the Grey Preference Index Value (G-PIV) ranking procedure to effectively manage epistemic uncertainty inherent in sustainability data. Ten ESG indicators obtained from the Refinitiv Eikon database for the 2021–2023 period form the analytical foundation of the sustainability assessment. The integrated weighting process identifies community engagement, product responsibility, and shareholder relations as the most influential determinants shaping banks’ sustainability profiles. Based on the G-PIV results, İşbank, Yapı Kredi, and TSKB rank as the top-performing institutions. The empirical findings not only provide valuable insights into the ESG positioning of Turkish banks but also offer a replicable methodological framework for practitioners and policymakers seeking data-driven sustainability benchmarking. Furthermore, the study contributes to the growing body of literature on grey system-based decision models, reinforcing their utility in addressing ambiguity and partial information in complex financial and sustainability evaluations. KW - ESG Sustainability KW - G-LOPCOW KW - G-MSD KW - G-PIV KW - Grey System Theory KW - Turkish banks CR - Abdel-Basset, M., Mohamed, R., Elhoseny, M., Abouhawash, M., Nam, Y. and AbdelAziz, N.M. (2021). Effcient MCDM model for evaluating the performance of commercial banks: A case study. Computers, Materials and Continua, 67(3), 2729-2746. https://doi.org/10.32604/cmc.2021.015316 CR - Akbulut, O.Y. (2019). Analyzing the performance of İşbank between 2009-2018 years by CRITIC and EDAS methods. 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