Australia's benchmark share index edged down on Tuesday as BHP and Rio Tinto declined on worries over a labour dispute at a mammoth copper mine in Chile, but energy stocks gained ahead of renewed US sanctions on major oil exporter Iran. Financial stocks also dragged on the S&P/ASX 200 index, which fell 0.3 percent to 6,253.9 in its fourth decline in five sessions. It rose 0.6 percent on Monday.
BHP said on Monday that it had formally requested government mediation with the union at its Escondida copper mine in Chile, where a strike could start as soon as next week if a deal is not reached with workers. Rio is the No.2 shareholder in Escondida, the world's biggest copper mine. Shares in BHP and Rio Tinto fell 1.4 percent and 0.8 percent respectively on Tuesday in the wake of the news.
In the industrials sector, Amcor Ltd, the world's biggest listed packaging company after announcing an all-stock deal worth about $5.25 billion to buy US-listed Bemis Company Inc. The benchmark's biggest loser, fleet management services provider Eclipx Group, slumped 40.8 percent after trimming its full-year profit outlook.
Meanwhile, the Reserve Bank of Australia's kept its cash rate at a record low of 1.5 percent on Tuesday. The central bank has notched up two whole years with no move in interest rates as optimism on the economy is tempered by miserly wage growth and muted inflation.
In New Zealand, the benchmark S&P/NZX 50 index dropped 0.3 percent, with losses in materials and healthcare stocks dragging.
Fletcher Building Ltd was the biggest influence on the benchmark, ending 2 percent lower.