Testing unobserved market heterogeneity in financial markets: The case of Banco Popular

摘要

In this paper, we use a specification of the standardized duration to test unobserved heterogeneity in a nonlinear version based on a self-exciting threshold autoregressive conditional duration model. We illustrate the relevance of this procedure for identifying the presence of heterogeneous agents in the final days of trading of Banco Popular, the first bank rescued by the European Single Resolution Board.