The Australian dollar surged to a three-year high against the US dollar on Wednesday, climbing 0.8% above $0.71 after hawkish comments from Reserve Bank of Australia Deputy Governor Andrew Hauser. Investors interpreted Hauser's remarks about persistent inflation pressures as signaling another potential interest rate hike this year, reinforcing the central bank's tightening stance.

The currency rally followed the RBA's recent 25 basis point rate increase to 3.85%, with markets now pricing in further monetary tightening. Hauser's statement that the bank would not hesitate to act again to ensure price stability prompted traders to scale up expectations for near-term rate hikes, driving the AUD/USD pair to levels not seen since early 2023.

The dollar's strength also benefited from a softer US dollar ahead of key US jobs data, which could influence the Federal Reserve's policy path. The combination of domestic hawkish signals and external dollar weakness has positioned the Australian dollar for continued gains, with traders closely watching both RBA communications and US economic data for direction.