Australia's central bank hikes rates by 25 basis points, defies expectations CNBCRBA hikes rates again, interest rates rise above 4 per cent | ABC News ABC News (Australia)Australia Unexpectedly Raises Key Rate, May Tighten Further Bloomberg'More pain': Major concerns of more rate hikes to tame inflation Sky News AustraliaAustralian Dollar Jumps as RBA Hikes; How Much More to Go For AUD/USD?