Portfolio magazine closed after only two years

The most expensive magazine launch in the history of Condé Nast has fizzled out. The company today announced it was shuttering Portfolio, its struggling business magazine (in which $100 million was reported to have been invested), according to a story in Folio:.The 450,000-circ magazine was launched in April 2007 and did some excellent editorial work. However, before it much got its legs under it