Global copper prices peak

Mongolia experiences a mining boom. Global copper prices peak.[1] The copper prices reach USD 4.50/lb in April 2011. In January 2009 this was still USD 1.5/lb. See this chart: http://www.infomine.com/investment/metal-prices/copper/10-year/

[1] https://www.nasdaq.com/market-activity/commodities/hg%3Acmx retrieved 7 September 2018