The Australian dollar held around $0.71, near a four-week low, as a stronger US dollar and rising Treasury yields pressured the currency ahead of the Federal Reserve's policy decision. Markets widely expect a 25-basis-point interest-rate increase, the Fed's first hike in around three years. The US 10-year Treasury yield climbed above 5%, its highest level since 2007, as oil prices and continuing inflation concerns strengthened expectations for tighter policy. Oil remained near a four-month peak above $105 a barrel after new Houthi attacks on Saudi Arabia and the postponement of Gulf-Iran talks. The Reserve Bank of Australia's hawkish stance has provided some domestic support, with markets pricing an 85% probability of a rate increase to 4.60% at its September 29 meeting. Investors are awaiting comments from Governor Bullock, who is scheduled to appear before Parliament on Friday.