GOL/ Spark Infrastructure SKI.AX was the top gainer on the benchmark index, adding 5.4%, after a consortium that includes private equity giant KKR & Co Inc KKR.N sweetened a buyout deal for the electricity infrastructure investor. The worsening outbreak could lead to Australia's central bank delaying the tapering of its asset purchases from September to November, London-based research consultancy Capital Economics said in a note. Domestic consumer prices rose at the fastest annual pace in almost 13 years last quarter, data showed on Wednesday, but a milder rise in core inflation suggested the spike could be temporary.