Retail stocks have been strong, and three retailers made the Big Cap 20 list this week. Each of them has a defensive flavor. TJX (TJX) operates 1,113 T.J. Maxx, 485 HomeGoods and 973 Marshalls stores, all off-price retailers of apparel and home fashions. In 2012, TJX acquired Sierra Trading Post, an off-price Internet retailer based in Cheyenne, Wyo. The company has delivered remarkably stable growth.