The benchmark is on track to rise for a third-straight quarter in what will be its longest streak of quarterly gains since March 2014. Investor sentiment was also supported by a higher Wall Street on news that American consumer confidence shot to its highest in more than 15 years in December. US equities have been riding a post-presidential election rally, feeding on optimism that Donald Trump's plans for deregulation and infrastructure spending could bolster the economy.
The Australian mining index on Wednesday closed at its highest since mid-December, as a rally in base metals prices drove gains. Major miners Rio Tinto, Fortescue, and BHP Billiton added between 2.4 percent to 3.5 percent. New Zealand's benchmark S&P/NZX 50 index ended flat as gains in consumer cyclicals and energy stocks were offset by losses for industrials and staples. Shares of SKY Network Television were among the biggest gainers on the benchmark, up 2.7 percent.