From Official Guidelines to Practice: Decoding Europe’s Countercyclical Capital Buffer Decisions

Summary

In this study, we analyze how European regulators set the countercyclical capital buffer (CCyB). We find that they do not strictly follow international rules. Instead, decisions are often made using a positive, cycle-neutral buffer. If these rules had existed before the 2007–2008 global financial crisis, banks would have had enough capital to avoid government help.

Highlights

Improving bank resilience 
If regulators had applied the CCyB methodology before the 2007–2008 crisis, banks would have built up €289bn in extra capital. This amount would have exceeded the €240bn governments spent to stabilize financial institutions across the EU afterward. 

Drivers of CCyB rates 
CCyB rates are mainly influenced by supervisory funding structures and whether authorities apply a positive, cycle-neutral buffer, meaning banks hold a small, permanent capital cushion even in normal times. 

About the study 
The study uses linear and nonlinear models with BIS, ECB and World Bank data to analyse how CCyB rates are set in Europe. It also highlights future research on the costs and benefits of positive cycleneutral buffers and on harmonizing frameworks to improve policy effectiveness.