No one has the details of why Renault-Nissan head Carlos Ghosn was arrested — but here are the main

Carlos Ghosn, the architect of the Renault-Nissan-Mitsubishi alliance, was arrested in Japan last week. Nissan alleged that he had engaged in years of financial misconduct. He has yet to be charged. Ghosn is an auto-industry legend, and if he falls, it would the most spectacular demise in the history of the car business. Last week, the auto industry was rocked to its core when legendary executive Carlos Ghosn was arrested in Japan. Ghosn, 64, was chairman and CEO of Renault, chairman...