More from Moody's:

The factors supporting the rating affirmation are:
1. Moody's expectation that Australia's demonstrated economic resilience will endure in an uncertain global environment;
2. A very strong institutional framework;
3. Stronger fiscal metrics than many similarly rated peers - despite the increase in government debt from previous low levels - which we expect to remain consistent with a Aaa rating over the medium term.

Risks:

Australia's reliance on external financing, elevated household debt and rising residential property prices pose risks. The stable outlook on the rating reflects Moody's expectations that policy vigilance and response to these risks will be effective, and Australia's sovereign credit profile will remain resilient to these risks.

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Well, that's a bummer. Page views are much better when the news is doom and gloom