In a conference hall deep under the glass pyramid of Paris’ Louvre Museum, Bernard Arnault was visibly annoyed.
The billionaire chief executive officer of the world’s biggest luxury group is contending with an unprecedented demand slump in China and the threat of steeper US tariffs that have hammered his company’s shares and knocked him from first to 10th among the world’s wealthiest people. But on this April morning, Arnault’s displeasure was directed at the elevator music playing…