The IBD Sector Leaders grew to a dozen in Wednesday’s issue with the addition of Gentherm (THRM) and Synchronoss Technologies (SNCR), while SM Energy (SM) exited the list. Gentherm rose to a new high Wednesday morning before reversing lower to close down 1.85 at 48.60. Still, the IBD 50 stock has driven more than 80% higher this year and is extended following a rebound off its 10-week moving average last week.