Are monetary policy announcements related to volatility jumps?

Central Banks interventions are frequent in response to exogenous events with direct implications on financial market volatility. In this paper, we introduce the Asymmetric Jump Multiplicative Error Model (AJM), which accounts for a specific jump component of volatility within an intradaily framework. Taking the Federal Reserve (Fed) as a reference, we propose a new model–based classification of monetary announcements based on their impact on the jump component of volatility. Focusing on a short window following each Fed’s communication, we isolate the impact of monetary announcements from any contamination carried by relevant events that may occur within the same announcement day.