Treasurer Jim Chalmers is holding a press conference Parliament House in Canberra after the Reserve Bank of Australia raised interest rates by a quarter of a percentage point. The Reserve Bank has lifted official interest rates by a quarter of a percentage point, in a decision that will add about $100 a month to the repayments on a $600,000 mortgage. The Australian sharemarket bounced back after the Reserve Bank moved to hike interest rates as the fuel shock from the Iran war adds to inflation pressures. Though widely anticipated, today’s rate rise was a split decision, with four of the central bank’s nine board members in favour of keeping rates steady. The S&P/ASX 200 added 18.20 points, or 0.2 per cent, to 8601.60 as of 2.45pm AEDT, with seven of its 11 sectors in the red. Interest rate-sensitive stocks such as retailers and tech companies were lower, while the Big Four banks advanced. The Australian dollar was trading at US70.51¢.…