Australia's central bank raised rates for a second straight month in a tight call on Tuesday, warning of a "material" risk to inflation as policymakers stepped into a volatile global backdrop amid an intensifying Middle East war. The Reserve Bank of Australia kicked off a critical week for major central banks as the U.S.-Israeli strikes on Iran unleash an oil shock.The Federal Reserve and the European Central Bank are widely expected to keep interest rates unchanged, though the war threatens to throw their future calculus off course.