Real Time Detection of Structural Breaks in GARCH Models Staff Working Paper 2009-31 Zhongfang He, John M. Maheu A sequential Monte Carlo method for estimating GARCH models subject to an unknown number of structural breaks is proposed. Particle filtering techniques allow for fast and efficient updates of posterior quantities and forecasts in real time. Content Type(s): Staff research, Staff working papers Topic(s): Econometric and statistical methods, Financial markets JEL Code(s): C, C1, C11, C15, C2, C22, C5, C53