Portfolio and blank for producing the same

A portfolio is formed from a blank of relatively rigid sheet material that includes front and rear covers hingedly connected for enclosing a multiple-page document. A document securement flap extends as an integrally formed member from the top edge of the rear cover. The document securement flap includes multiple panels defined by parallel fold lines. Folding of the panels about the fold lines creates a pocket for receiving and securing the upper marginal edge of the multiple-page document, and creates a structure that permits the document so secured to pivot about the fold line at which the document securement flap joins the rear cover.