
The Euro as a currency could only work if the member states agreed to work within pre-determined fiscal contraints. Normally balance of payment deficits/surpluses and high levels of Sovereign debt could be managed with adjustments to the exchange rates, changes to interest rates and cut backs in budget deficits. With the Euro though it is like locking in your exchange rate with member countries, and that exchange rate never moves. So you now have northern European countries (Germany, Netherlands) being the model of fiscal restraint. Germany has legislated balanced budgets, so that debt does not get out of hand. Meanwhile, their Southern European Euro-cousins (PIIGS, Portugal, Italy, Ireland, Greece and Spain), have levered off the strength of other members to run up large debts relative to their respective GDP's. As it turns out, Greece, who was admitted to the Euro in 2002, used derivatives to artificially lower the level of debt, to enable access to the Euro. As easy debt flooded their economies, a housing boom was created.
So whether Germany bails out Greece is one issue, but can the fiscally distressed countries even remotely pull back their deficits and pay back debts without a complete riot from the population. Witness the current strikes in Greece.
So as the World mulls all these possibilities, the Euro has fallen in value against the US Dollar. This is good for the Europeans, since exports become more competitive and imports are more expensive, bringing a welcome dose of inflation. Inflation is good for Governments, since they need asset prices to go up, hopefully to outweigh the massive debt.
What is good for the Euro is bad for the US dollar. The US would have to prefer a lower dollar for the same reason. The US dollar index fell from a high of 88 to the mid-70's, matching a huge stockmarket bull run last year. So with the world more worried about the Euro, there is little chance that the US will lift interest rates causing the dollar to rise even further. Lifting interest rates is the weapon of choice in fighting inflation. Again, World Governments need inflation to make the debt more respectable. As mentioned last week, Japan has been fighting deflation for 20 years despite huge amounts of stimulus.
The US are unlikely to lift interest rates, which is why they were at pains to emphasis that last weeks interest rate lift only applied to emergency bank funding. Obama just might cut the stimulus to the economy, but a quick correction in the sharemarket (a la Japan over 20 years) will get their hand back to the pump.