FBR Capital analyst Susan Anderson says lululemon (LULU) had a "huge" Boxing Day clearance sale. Boxing Day is the day after Christmas. While the retailer typically has a December 26th sale, this year's sale had 19 racks of sales items versus three last year, Anderson tells investors in a research note. She believes this year's holiday season ended up being more promotional than expected, partly due to warmer weather, and will further separate the winners and losers. The analyst favors Hanesbrands (HBI), Ascena Retail (ASNA), American Eagle (AEO) and Under Armour (UA) into the Q4 reporting season. She thinks lululemon, Abercrombie & Fitch (ANF) and Gap (GPS) are at risk of missing expectations. Note Wedbush analyst Morry Brown this morning said lululemon had a strong Christmas weekend with limited markdowns and promotions.