CFD is a commodity pool traded on the NYSE. It follows the mechanical trading system developed by Jarecki. Don't know how it works, but resets in January and sells calls against long-only positions.
Good discussion here.
http://www.sec.gov/Archives/edgar/data/1345801/000119312511346462/d272448dex991.htm
http://www.nuveen.com/CommodityInvestments/FundDetail.aspx?fundcode=CFD&tab=PR
Good discussion here.
http://www.sec.gov/Archives/edgar/data/1345801/000119312511346462/d272448dex991.htm
http://www.nuveen.com/CommodityInvestments/FundDetail.aspx?fundcode=CFD&tab=PR