22 Notions
(de Bandt and Hartmann, 2019). In nancial economics, “systemic risk” is the
risk of a “systemic event”, i.e. of adverse events aecting a large share of the
nancial system, alienating partially or totally, but to a signicant extent, its
ability to exert its main functions, namely the provision of nancial services, the
channelling of savings to investment and the allocation of risk in the economy,
with macroeconomic and welfare consequences.
This denition is consistent with the one given above for nancial stability
(1.1), in the sense that it corresponds to the most severe and extreme cases of
nancial instability.
The economic literature highlights several forms of systemic events:
• Contagion eects (1.4.2).
• Common exposu ...