Benchmark copper on the LME slipped 0.5 per cent to $6,456 per tonne
Nickel price highest since Oct, zinc hits 13-month high
Copper for three-month delivery gained 1% to $4,557 a metric tonne on the London Metal Exchange
Metal for delivery in June edged up by 85 paise, or 0.27%
Supply surplus and weak demand from China to keep demand down