Jerome Kerviel may be the world’s biggest rogue trader, but since losing the French bank Societe Generale Euro 4.9bn and going into hiding with his mother, he is also the face that launched a thousand spin-off T-shirts, baby’s bibs, novelty mugs and branded women’s shell suits.

“JK”, as his friends on the trading floor called him, is a working-class Breton who was looked down on by his snobbish bank superiors - this has won him huge sympathy in France, where he is seen as the wronged scapegoat for evil capitalism. But as his growing fan club logs on to peruse the new JK merchandise, capitalism appears to be alive and well.

Clothes adorned with JK slogans have proved such a media hit that cafepress.com, the California-based retail website that launched the legendary pink “Jerome Kerviel’s girlfriend” cotton top - “the web’s most talked about T-shirt”- is branching out. It is now offering “Jerome Kerviel is a genius” tops for $18.99 and “I love Jerome Kerviel” G-strings, made in the US, for $9.99.

Why stop there when you can have an “I bet on Jerome Kerviel” bib, babygro or toddler’s T-shirt. The Jerome Kerviel women’s tracksuit is a bargain at $43.99. But given that Kerviel’s only real friend in his apartment block in the posh Paris suburb of Neuilly-sur-Seine was his elderly neighbour’s corgi, it is perhaps more fitting to spend $17.99 on a “Free Jerome Kerviel” T-shirt for dogs.

Even the bookmakers Ladbrokes are astonished at spending on Kerviel. When the scandal broke they opened a book on who would play Kerviel in a film (Kylie Minogue’s boyfriend Olivier Martinez topped the list at 3-1). Spokesman David Williams said it started as “a bit of fun” but more than 5,000 punters - “a highly unusual number” — have placed bets.

The editor of the English-language fan site jeromekerviel.com, run from Ireland, also said he was extremely surprised by its success, peaking with 30,000 hits last Tuesday and Wednesday, many from the US. If fans feel like investing in further reading, the site carries numerous links to products on sale at its affiliate amazon.com such as the rogue trader Nick Leeson’s book, Back from the Brink: Coping with Stress.