michael kors black Friday sale Adidas is to stick with its troubled Reebok business even though the German sportswear group had to make a 265 million euro writedown on the brand at the end of last year.Adidas, which bought Reebok in 2005 for $3.8 billion to try to close the gap with market leader Nike, last year had to cut its 2015 sales target for the brand by a third after two quarters of declining sales. But the group believes Reebok has a future alongside the Adidas ownname brand and the TaylorMade golf unit."We are sticking with Reebok," chief executive Herbert Hainer told reporters on Thursday.The company also said margin improvements would drive up profits this year as it sold more in emerging markets and drove down costs as a proportion of turnover.Adidas shares rose 5 per cent, hitting an alltime high as markets took a shine to the stronger margins and a 35 per cent dividend hike.Shares in local rival Puma, majority owne