Sierra, Lya Paola, Luis Eduardo Girón, and Carolina Osorio. “Has Financialization in Commodity Markets Affected the Predictability in Metal Markets? The Efficient Markets Hypotheses for Metal Returns”. International Journal of Economics and Financial Issues 7, no. 4 (July 27, 2017): 15–22. Accessed December 23, 2024. https://econjournals.com./index.php/ijefi/article/view/4695.