Barlybayev, A. , Ongalov, N. , Milosz, M. , Nazyrova, A. and Sembiyeva, L. 2025. Comparative analysis of classical, machine learning, deep learning, and adaptive neuro-fuzzy models for forecasting the S&P 500 index using financial, macroeconomic, and technical indicators. International Journal of Innovative Research and Scientific Studies. 8, 6 (Sep. 2025), 3286–3296. DOI:https://doi.org/10.53894/ijirss.v8i6.10337.