A key IBD tenet is to focus on leading stocks in leading industry groups. It’s a good rule to live by, but sometimes rules have a little wiggle room. Out of 197 industry groups ranked by IBD based on six-month price performance, the top 40 are shown Monday through Thursday in the print edition (today on B4). It’s OK to venture outside the top 40 groups for ideas so long as there is more than one top-performing stock in the group.