Similar to index-based exchange traded funds, ETNs also track some sort of index as part of their investment strategy. However, an exchange traded note, like the name implies, is a type of debt note that trades on an exchange. Additionally, the underwriting bank that issues ETN shares may choose to stop share creations.

Copper’s surge is benefiting other ETFs as well. For example, the SPDR S&P Metals and Mining ETF (NYSEARCA: XME) is up 4% over the past week and 11% over the past week. XME holds a basket of miners of industrial and precious metals, so it is not a dedicated copper fund, but it does have some exposure to copper miners.

Investors looking for an ETF dedicated to copper miners can consider the Global X Copper Miners ETF (NYSEArca: COPX), the sole U.S.-listed copper miner-focused ETF. COPX tracks the Solactive Global Copper Miners Total Return Index and is up a staggering 21% over the past month.

For more information on the mining sector, visit our metals & mining category.