Chikhaoui, M. 2025. Behavioural heterogeneity and stock market dynamics during the COVID-19 pandemic and Ukraine war: An empirical Markov Switching analysis of the GCC countries. Asian Economic and Financial Review . 15, 12 (Dec. 2025), 2000–2019. DOI:https://doi.org/10.55493/5002.v15i12.5783.