Yong, Jordan Ngu Chuan, Sayyed Mahdi Ziaei, and Kenneth R Szulczyk. “The Impact of Covid-19 Pandemic on Stock Market Return Volatility: Evidence from Malaysia and Singapore”. Asian Economic and Financial Review 11, no. 3 (March 8, 2021): 191–204. Accessed December 12, 2025. https://www.archive.aessweb.com/index.php/5002/article/view/2067.