Credit Suisse plummets 12%, options worsen as market mayhem takes toll

Dixit Joshi won’t forget his first day as Credit Suisse Group AG’s chief financial officer in a hurry. And yet the experience won’t have been entirely unfamiliar for the former Deutsche Bank AG high flier.
 

Shares in the Swiss banking giant plummeted 12% to an all-time low on Monday after a weekend of fevered Twitter speculation about its financial health, before they regained almost all of the losses later in the day. 

The wild gyrations show the difficulty for Credit Suisse in managing the febrile confidence of investors as it rushes to devise a repair plan for its investment bank,