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The Determinants of Portuguese Banks’ Capital Buffers

Ano de Divulgação 
2008
Código JEL 
G21 - Banks; Other Depository Institutions; Mortgages
G28 - Government Policy and Regulation
C23 - Models with Panel Data
Resumo 
The purpose of the present paper is to shed some light on why Portuguese banks hold significant capital buffers above the required regulatory minimum, through the estimation of a dynamic panel data model. The main findings are that the capital buffer is positively influenced by several broad risk measures, suggesting that the introduction of the more sensitive regulation in Basel II might not affect Portuguese banks’ capital ratios as much as one could expect. Provisions and high and stable profitability are found to be substitutes for capital buffers, whereas larger banks seem to hold less excess capital. A negative business cycle effect is also found, and several other hypotheses are tested.
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