Find out all you need to know about the decline in Copper prices in this article from Dailyfx
In summary:
The International Copper Study Group released their October Bulletin, providing a global view of supply and demand in the base metal’s market. The comprehensive review suggests that 2014 will conclude with refined copper demand exceeding production, while 2015 will find a supply surplus as demand lags production growth. With few suitable substitutes, the supply-side may face considerable obstacles as demand continues to expand.