You can learn about portfolio management online at www.kuro5hin.org/story/2005/1/4/16336/73272. Another good site is www.portfoliomonkey.com

If I had to guess I think operations and supply management would NOT involve Portfolio Management

Portfolio analysis & revision is required to maximize the value of the portfolio. Active management of a portfolio will add more value to portfolio than Passive management.

Capital Card services help with portfolio management by meeting with their customers and discussing what they need for their portfolio and then gives recommendations based on that.

"One of the best ways to learn about project portfolio management is to check a book on the subject out from the library. One book I would recommend is The Wiley Guide to Project, Program, and Portfolio Management."