In many European countries, two important but ailing institutions are currently interlinked: sovereign states and national banks. The interdependency between them explains in large measure why the continent’s leaders are contemplating a banking union.
A national bank tends to unofficially support its sovereign by buying government debt. An ailing financial system can by itself generate a large negative shock to the economy due to its function in allocating resources. This is especially true in Europe as it depends greatly on its banks for this function. Large, systematically important banks tend to be implicitly backed by their sovereigns. When either experiences considerable stress, the other suffers similarly.
The direction of causality is not always the same. In Ireland, a dysfunctional financial sector added too much debt to the sovereign when Dublin pledged to prop up its banks. In Greece, the amount of government debt generated a crisis which spread to its, and neighboring, financial systems.
When Mario Draghi decided in December of last year to provide an unlimited credit window to banks, it proved not enough to permanently instil confidence. Banks that have amassed assets on their balance sheet that may not look attractive remain fundamentally unstable. Indeed, given that the European Central Bank doesn’t necessarily operate as a “lender of last resort,” it has only put more strain on the balance sheets of sovereign states that are expected to save private banks from collapse. With this in mind, it was not a surprise that investors considered the €100 billion recently requested by Spain in support of its ailing banks as an addition to sovereign debt.
A banking union is seen as the next and a necessary step in “ever-closer union.” In view of all the other options that have been debated, most prominently eurobonds, the fact that a banking union is seen as the least worst compromise is telling. (more…)