• Article  

      Monitoring disruptions in financial markets 

      Andreou, Elena; Ghysels, Eric (2006)
      We study historical and sequential CUSUM change-point tests for strongly dependent nonlinear processes. These tests are used to monitor the conditional variance of asset returns and to provide real-time information regarding ...
    • Article  

      Rolling-sample volatility estimators: Some new theoretical, simulation, and empirical results 

      Andreou, Elena; Ghysels, Eric (2002)
      We propose extensions of the continuous record asymptotic analysis for rolling sample variance estimators developed for estimating the quadratic variation of asset returns, referred to as integrated or realized volatility. ...