SPADE Indexes develops and manages sector, theme, and regional indexes used as the basis for investment products including exchange traded funds. Included among these is the SPADE Defense Index (NYSEarca: DXS), a benchmark for companies involved with defense, security, and space. The index serves as the underlying index for the Powershares Aerospace & Defense ETF (NYSE: PPA). The firm publishes a free monthly newsletter "The SPADE Investor" which can be downloaded from the website
SPADE Defense Index website: http://www.spadeindex.com
SPADE Indexes top-level website: http://www.spadeindexes.com