Wang J-N, Hsu Y-T, Liu H-C. How useful are the Various Volatility Estimators for Improving GARCH-based Volatility Forecasts? Evidence from the Nasdaq-100 Stock Index. IJEFI [Internet]. 2014 Jul. 15 [cited 2024 Dec. 22];4(3):651-6. Available from: https://econjournals.com/index.php/ijefi/article/view/863