“Precious metals have experienced volatile trading this week, dropping to its lowest level in two and a half years,” said Dave Gedeon, Managing Director, NASDAQ OMX Global Indexes. “Changing inflation expectations and sustained strength in the US Dollar has curbed the demand for gold and silver as a long-term investment vehicle.” NASDAQ Commodity Natural Gas Index ER (NQCINGER) gained 4.2% this past week as forecasts for warmer-than-normal weather suggested likely increased demand from power plants.