LME copper, aluminium prices post modest gains, zinc falls Oil rallies from multi-year lows on Venezuela supply concerns Base metals prices on the London Metal Exchange largely moved higher on 19 December, led by strong gains in nickel. Nickel surged 1.73% d-o-d to $14,641/tonne (t), while aluminium rose 0.34% to $2,916/t. Copper edged up 0.21%…