(Bloomberg) -- Shares of Fast Retailing declined as much as 4.5%, the most since Sept. 30, after a spokesperson said the company is concerned about Chinese demand following comments from its chairman that the retailer is not using cotton from Xinjiang. Most Read from BloombergRiyadh Metro Partially Opens in Bid to Ease City’s Traffic JamsIn Traffic-Weary Toronto, a Battle Breaks Out Over Bike LanesTadashi Yanai said Fast Retailing’s flagship clothing chain Uniqlo does not source cotton from Chin