GREEN VS. NON-GREEN PORTFOLIO PERFORMANCE ACROSS BRICS NATIONS: A MULTI-COUNTRY ANALYSIS OF EFFICIENCY, SCALABILITY, RISK-ADJUSTED RETURNS, AND MACHINE LEARNING FORECASTING. cmsr [Internet]. 2026 Apr. 29 [cited 2026 Apr. 29];4(4):444-73. Available from: https://cmsrjournal.com/index.php/Journal/article/view/927