This via Westpac, their 'FX Weekly'

(in brief)

  • Elevated commodity prices and decent Australian data should help AUD/USD find support on dips to around 0.78
  • But if risk aversion rises again and the US dollar finds some support from upbeat Fed commentary in Wyoming, then AUD/USD gains should be capped around 0.80

More:

AUD/USD's steady downtrend in the first half of August

  • consistent with lopsided speculative long positioning
  • and a reversion towards fair value (an estimate of where the Aussie "should" be based on fundamentals such a commodity prices and interest rate differentials)
  • A firmer US dollar played a role in this move

Broad USD gains in that time were interrupted last Wednesday ... looked to be driven by

  • a combination of Fed commentary
  • and US political turmoil

AUD also found some help last week on

  • An easing in volatility measures, with North Korean tensions waning
  • Spot iron ore prices recovered ... almost $78/tonne, a high since April
  • Australia's strong jobs data added to the fuel for the AUD/USD rebound