Lululemon boss to step down early next yearHowever, this week the company upgraded its annual revenue forecast after better-than-expected sales in the past few months.The decision comes amid a run of poor sales for Lululemon in the US, its main market, in recent times and its share price falling almost 50% in the past year.Calvin McDonald, the firm's chief executive, will depart at the end of January after more than seven years at the helm.The boss of Lululemon Athletica, the brand known for its expensive y ...