Women's clothing retailer Reitmans (Canada) Ltd on Thursday revealed it swung to a fourth quarter loss due to poor margins. The Montreal-based operator of 820 stores under banners like Reitmans, Smart Set, Pennington's and Dalmys, reported a net loss of C$2.4 million (US$1.6m) for the 13 week period versus a year-ago profit of C$7.2m in 2001.