Shares of Gucci owner Kering jumped over 9% on Thursday after the company's sales decline narrowed and quarterly earnings beat estimates. The French luxury giant – whose brands include Gucci, Saint Laurent and Balenciaga – reported sales of 3.42 billion euros ($3.97 billion) for the third quarter, a 5% decline on a comparable basis from the same period a year earlier. It marked an improvement from the second quarter, when comparable sales fell 15% year-on-year. Sales at Gucci, the firm's