PARIS -- Société Générale says wayward trader Jérôme Kerviel lost the bank $7.2 billion. But that was last week. He's now on his way to cult celebrity -- and he still hasn't lost his job.

Société Générale has stopped paying Mr. Kerviel and told him not to come to the office, but it hasn't managed to formally fire him. French law stipulates that to do that, the bank must first call him in for a sit-down meeting and explain its dissatisfaction. He has the right...