Adidas AG reported stronger-than-expected fourth-quarter profits and announced a new share buyback program as the German brand looks to maintain its momentum with retro sneakers and new running and football products. The German sportswear company generated operating profit of €164 million ($196 million) in the fourth quarter, it said in a statement of preliminary figures late Thursday. That exceeded analyst estimates and drove full-year operating profit slightly above its forecast from October. The company further announced a €1 billion share buyback program that will start in February and be financed through the company’s cash flow generation this year. Gulden is hoping Adidas can keep grabbing market share from rival Nike Inc., which is looking to stage a comeback after years of struggles.