The price bubble, generated by speculative investment, seems to be exhausted and further significant substantial price decrease is unlikely, cash costs of production for many base metals (for copper for example) being close to or even higher than market prices.
投机性投资产生的价格泡沫似乎已枯竭，价格进一步大幅下跌的可能性很小，许多贱金属(如铜)的现金生产成本已接近甚至高于市场价格。