Abstract
This paper proposes a general statistical framework for systemic financial stress indexes. Several existing index designs can be represented as special cases. We introduce a daily variant of the ECB’s CISS for the euro area and the US. The CISS aggregates a representative set of stress indicators using their time-varying cross-correlations as systemic weights, like portfolio risk is computed from the risk characteristics of individual assets. A bootstrap algorithm delivers test statistics. A linear VAR shows that the Great Recession is mainly caused by CISS shocks, while their contribution to the COVID-19 crisis appears limited. A quantile VAR suggests particularly strong real effects of financial stress in the worst states of the economy.
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