How Hermès became the ultimate status symbol

The Birkin bag. A square silk scarf printed with horse bridles. A cashmere throw blanket splashed with the letter H. For years, Hermès' iconic products have been coveted by those in the know.

Now, its shares are also hot commodities, with their performance outpacing bigger luxury brands like Louis Vuitton owner LVMH and Gucci-maker Kering.