Background
European sovereigns are experiencing financial stress from fiscal deficits and rolling their existing debt.  These issues are worsened as members of the European Monetary Union. The EMU is a common currency shared by 16 of the 27 European Union members, with one more nation to join in 2011.  By being a member of a currency union, an individual nation’s ability to target an exchange rate and interest rate policy appropriate for its point in the business and employment cycle is effectively surrendered.  The nations in Europe having the most problems with their debt are those with low labor productivity, high current account deficits, large financial system debt relative to GDP, or low tax compliance: Greece , Ireland , Portugal , Spain , and Italy Greece  and Ireland 
Scenarios
It is difficult to judge what the various probabilities of outcomes are.  Roubini Global Economics has forecast a 35% chance of some kind of breakdown by the end of 2012, with this risk increasing to 45% by 2020.  Rather than handicapping the odds, the most important takeaway is that it’s not a zero delta any more.  Here are some potential scenarios:
A: Greek Exit
The Greek situation is difficult as their deficit is driven by a large primary budget gap, in addition to a financing gap.  This is analogous to a corporation with a negative operating cash flow, and a poor financial structure.  Financial restructuring can fix a “bad” capital stack, but it cannot make a good business.  Greece Argentina 
            Bond Haircuts: S&P has suggested recovery rates for bondholders at 30% to 50%
            Currency Adjustment: ING has suggested a “New Drachma” would fall 80% vs. the EUR
            Bond Yields: RGE suggests Bunds go to sub 1% yields while peripheral yields hit 7-12%
            Euro: estimates vary widely but ranges from .85 to 1.15 vs. USD are suggested
B: Partial Breakup
The way the EFSF is structured -- as a supranational borrowing fund partially backed by the very same borrowers -- creates a vicious circle as more countries avail themselves of the facility.  Essentially, as the funding lines get drawn on by more member nations, the burden increases on the dwindling number of backers.  Under this domino theory, after the first EMU withdrawal, the contagion will spread quickly to the other peripheral nations, eventually leading to the PIGS nations withdrawing from the EMU, in order to make economic adjustments without the limitations of a monolithic currency and interest rate.  Under this scenario the EMU splits into a hard currency bloc and mostly Mediterranean currencies.  In addition to some of the forecast impacts above, there will be further damage as the European financial sector sees its capital base destroyed.  Government bonds play an important role in depository banking, being both an interest earning asset, as well as the regulatory capital set aside to protect against credit losses.  So when regulatory capital goes bad, it has a particularly crushing effect on the financial sector.  The exposure to PIGS debt ranges from 20% - 40% among the large Western European banks, and the sector still is weak from the 2008-9 financial crisis and recession.
C: Full Dismantling
Under the extreme stress test, northern European nations are unable to agree on a hard currency bloc and, like their neighbors to the south, decide their national interest is best pursued with sole control of their store of value / medium of exchange, and its interest rate.  In this case one could expect wide divergence between end currency values and interest rates.  If one looks at the original rates that each nation entered into the union at, nearly all will suffer devaluation upon exit if an account surplus/deficit model is used.  The valuation adjustment would be borne by Germany 
First Order Effects
The first order effects will be price shocks to a host of financial instruments both within the EU / EMU and, as the waves ripple outwards, toward other areas.  Based on the scenarios described above, ascribe more severity as the EMU proceeds to fragmentation; less if it’s a single national withdrawal.  Here are some range estimates from research we have reviewed.  
            FX:       
                        Other core – Benelux , Austria , Finland 
                        Euro – as the crisis deepens, rates from .75-1.15 suggested
                        USD / CHF – Flight to safety currencies, others may be Nordics.
            Recovery Rates: 
                        Estimates are recovery rates of 30% to 50% on an NPV basis. 
                        Haircuts for bond holders could take the form of
Rescheduled maturity
Principal adjustment
Coupon manipulation.                 
            Bond Yields:
                        Wide divergence expected
                                    Northern Core – low rates, with some reaching sub 1% yield
                                    Peripherals – high rates, with worst hitting teen range
            Curve Shape: 
                        Money market rates to compress as assets flood into ‘cash’ 
                        Curve to steepen as risk premium for term money heightens
Second Order Effects
After the immediate price shocks, there will be numerous additional impacts across the economy and markets.  One of the first will be capital controls as governments seek to redenominate assets and liabilities in their country, and stop mobile capital from leaving.  These will be difficult to implement, as having moved to one common currency simply makes it easier for those in troubled nations to move their financial holdings abroad.  Greece  and Ireland US 
Longer Term
Over the longer term, a partial (or full) splintering of the EMU will reduce growth within the EZ.  A common currency made EMU economies more efficient by reducing friction costs and improving planning – that advantage will be reduced if EMU is ended.  That reduction in regional economic growth has been estimated at 1% to 9%, depending on the scale of unwind.  Peripheral countries pulling out will be impacted more.  As debt is destroyed, there are deflationary effects as well, which could spill over to other regions.  In particular, a strengthening USD may hurt US exporters, and tip the US 
Case Studies
Here are recent sovereign bailouts/defaults, along with commentary from Bridgewater Associates. 
Bretton Woods Exit: USD devalued against gold, prices moved from $35/oz to $70/oz from 1968 to 1972, essentially a 50% devaluation
Thailand 97: 40% devaluation
Indonesia 97: 60% devaluation initially, 90% eventually banking system and external debt restructured.  Hyperinflation
Korea 97: 50% devaluation, but rapid recovery in fx, markets, and growth
Brazil 98: 40% devaluation
One key thing to note, in almost all situations sovereign debt problems are generally not solved with austerity.  Canada 
The trend within Europe , over 50 years plus, from the first formation of a coal and steel customs union across the Alsace-Lorraine, has been toward deeper integration and harmonization of countries.  This is a powerful trend to buck, and there are good arguments that the current crisis will lead to a “Federal Europe” rather than a schism.  It seems difficult to reconcile that when languages, customs, and ethnicities are so different, even across small regions.  India 
Investment Implications
The impact among European financial equities would be severe, as most financial companies are inherently leveraged, and even small haircuts to asset values can quickly wipe out equity.  Revisiting the market capitalization changes of US financial equities during the 07-09 financial crisis would be instructive to show how quickly even the largest institutions could fall.  Even ‘national champion’ TBTF banks could fall, if the sovereign that implicitly backs them is not large enough to meet claims, or is unwilling to.  In this respect, the impact is not purely analyzable from a spreadsheet / economics perspective, but requires careful thought around the domestic and international politics of the affected nations.  (For example, Latvia 
Milestones to Watch
The value of the Euro, the inter Sovereign CDS spread markets, and the equities / credits of European financials will all be important measures of the real time probabilities of EMU disintegration (in one form or another).
Conclusion
We should consider putting on a portfolio tilt to actively underweight financials.  This is painful, as this sector is already considered cheap by many metrics.  Again, that is a topic for deeper exploration but if history is a guide, financial equities tend to be poor performers when underlying sovereigns credit is deteriorating. 

