Dec 23 2013 M. Hossein Partovi   Hedging and Leveraging: Principal Portfolios of the Capital Asset Pricing Model   Abstract  Contact Information  Citation  Full Text  -  Preliminary Result   Oct 25 2004 M. Hossein Partovi and Michael Caputo   Principal Portfolios: Recasting the Efficient Frontier   Abstract  Contact Information  Citation  Full Text  -  Preliminary Result