What the Eurozone would need a common budget the most for, is to help rescue many of its members from their huge risky 0% risk weighted sovereign debts.

Sir, Martin Arnold reports that Mario Draghi, “the outgoing ECB boss repeated his call for eurozone governments to create a sizeable common budget that could be used to provide greater economic stability in the 19-member currency zone by supporting monetary policy during a downturn.” “ECB chief Draghi uses swansong to call for unity” October 29.

As I see it the eurozone, unwittingly, already had a sizable non transparent common budget, namely that of, for purposes of risk weighted bank capital requirements, having assigned to all eurozone sovereigns’ debts, a 0% risk-weight, even though none of these can print euros on their own.

Some of these sovereigns used that privilege, plus ECB’s QE purchases of it, to load up huge debts at very low interest rates, so as to spend all that money. Now things are turning hard for many of these. Greece was small and walked the plank, and had to mortgage its future. Italy might not be willing to do so. There is a clear redenomination risk, and it is being priced more and more. 

So when Draghi now says “We need a euro area fiscal capacity of adequate size and design: large enough to stabilize the monetary union” it is clear he is very subtle referring to the dangers of the euro breaking down.

But when Draghi mention that fiscal capacity should be designed as not “to create excessive moral hazard”, then its harder to understand how that moral hazard could be worse than that already present in that idiotic 0% risk weighting.

What is clear is that for a eurozone common budget to serve any real purpose, those privileged 0% risk weights have first to be eliminated.

Just like it is hard to see some states with good credit standing accepting a 0% risk weight of other in much worse conditions, it would be difficult to explain for instance to Germans why their banks need to hold around 8% in capital when lending to German private entrepreneurs, but no capital at all when lending to the Italian or Greek governments.

How to do that? Not easy but my instincts tell me it begins by allowing banks to keep all their current eurozone sovereign debts exposures against zero capital, but require these to put up 8% of capital against any new purchases of it. That would freeze bank purchases, put a pressure on interest rates to go up, and allow the usual buyers of sovereign debt to return to somewhat better conditions.

But, of course, that might all only be pure optimistic illusions, and all eurozone hell could break out. 

@PerKurowski