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Reserve Bank of Australia governor Glenn Stevens said interest rates for borrowers had "declined to be close to their medium-term average" after two rounds of rate cuts in November and December.
The United States was expanding moderately, offsetting weakness in Europe, and though China's growth had eased slightly Stevens said it "remained quite robust through the second half of last year".
"With growth expected to be close to trend and inflation close to target, the Board judged that the setting of monetary policy was appropriate for the moment," Stevens said.
The Australian dollar surged on the result to 107.98 US cents from 107.05 prior.