Buffer fragmentation reduces corporate lending by 50 basis points
European Central Bank researchers Markus Behn, Marco Forletta, and Alessio Reghezza found that capital buffer fragmentation reduces corporate lending growth by 50 basis points. Exposed euro area lenders retain up to 36 basis points in extra precautionary capital headroom.
Three dimensions of regulatory friction
The Macroprudential Fragmentation Index evaluates 1,411 banking union institutions from 2021 to 2024 across three dimensions: tool count (breadth), annual upward rate adjustments (churn), and cross-border exposure dispersion.
Matched with 2.9 million AnaCredit loan records, the metric is orthogonalised against capital requirement levels, bank size, and cyclical indicators.
A one-standard-deviation increase in fragmentation reduces corporate credit growth by 50 to 90 basis points within identical bank-firm pairs.
This contraction is strongest among lenders with low capital headroom, where each additional percentage point of distance to Pillar 2 guidance offsets 0.055 percentage points of the lending decline.
Self-insurance through larger buffers
Lenders respond to regulatory complexity by building extra capital buffers rather than risking sudden compliance shortfalls.
A one-standard-deviation rise in policy fragmentation increases capital headroom by 26 to 36 basis points across specifications.
While national authorities activate countercyclical and systemic risk buffers to target local risks, overlapping requirements and frequent rate revisions create uncertainty.
Banks self-insure against unexpected adjustments by expanding management cushions above binding thresholds, curtailing loan origination in the process.
Flexibility carries an unseen cost
Macroprudential discretion was built to target localized systemic risks with surgical precision.
Yet regulatory layering and constant recalibrations inadvertently create uncertainty that curbs corporate credit.
National authorities can no longer treat decentralized buffer adjustments as a free lunch.
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