Shares in Kering sank, after the French fashion conglomerate named the provocative designer Demna as artistic director of Gucci, its largest brand. Kering stock recently stood more than 13% lower, putting the shares on course for one of their biggest one-day drops on record,

Kering lost around $3 billion in stockmarket value on Friday after the group chose in-house talent Demna to reinvigorate its Gucci label rather than hiring one of fashion's big-ticket names as chief designer.

The Georgian creative will wrap up his tenure at Balenciaga with a couture show on July 9. His successor has yet to be named.