CPER is a commodity pool tracking copper futures contracts on COMEX. The fund uses a complex optimization process to select two or three contracts each month in an attempt to mitigate the effects of contango. Contracts are selected using quant analysis on prices of eligible copper futures, developed by Summer Haven Index Management. Because of the fund`s commodity pool structure, investors will pay a blended tax rate on capital gains regardless of how long they`ve held it, and will receive a K-1 at tax time.