“…Since interest payments are in general deductible from the corporate income tax base whereas equity returns are not, firms have an incentive to use higher leverage. The effect of interest tax shields on firm leverage has been widely studied for non‐financial firms (e.g., Arena & Roper, ; Desai et al, ; Faccio & Xu, ; Feld et al, ; Graham, ; Graham & Tucker, ; Heider & Ljungqvist, ) and for banks (e.g., De Mooij & Keen, ; Hemmelgarn & Teichmann, ; Horváth, ; Milonas, ; Schandlbauer, ). However, banks are, in principle, more systemic than non‐financial firms so the effect of this tax bias is particularly pernicious for them.…”