Of course, the $50 billion is only the beginning. Some rumors have suggested numbers closer to $500 billion but we're not there yet. Meanwhile, the much smaller problem (and delay) of Greece is still out there to be resolved. The Guardian:
A first indication would come by Monday, she said, with an International Monetary Fund report on Spain. That is expected to say that Spanish banks need a capital injection of €40bn (£32bn) and may be considered sufficient for a preliminary bailout request over the weekend, especially as the government has already seen the figures.Interestingly enough, the euro is in a holding pattern with the dollar, though that is likely to change as the eurozone problem unfolds.
It remained unclear, however, when an announcement would come and how detailed it would be.
A Spanish bailout will almost certainly be targeted directly at its banks, avoiding a wider crisis that could prevent Spain borrowing on the markets to fund government spending.