Let me try to express my opinions here for a minute even if people might disagree and want to debate my opinions.
First, a clarification of the situation.
* Greece had to accept budget reductions of 30 billion in order to take the bailout money
* These budget cuts will cause a more serious recession in Greece
* The recession will make it more difficult for Greece to pay the 5% interest on the money they will receive
Even if the EU starts buying bonds and the euro, this will not change the situation. It will simply slow down the crisis. The only possibility that I've heard on Bloomberg to solve the situation is to allow Greece to default on their debt.
The hedge funds ect who believe in laissez-faire economics will hammer the euro once the EU decides to support the euro. The EU will lose and be forced to allow Greece to default on their debt.
Oil will go down because people will be concerned about another worldwide recession. This will cause the AUD/USD to go down as commodity prices go down. You will lose your shirt by buying the Aussie.
If the EU succeeds in stopping this freight train towards a wreck and you make money on the Aussie, you'll get my congratulations. I'll also be absolutely stupefied or whatever you want to call it that the EU has managed to save the day with Keynesian intervention. I believe they have a lot of audacity to believe government intervention will totally change the situation. If they manage to do that, I will start believing that the Eurozone is Godlike and worship them forever.