For-profit educators were Thursday's top-gaining industry group after a key earnings report sparked a buying spree in those stocks. DeVry (DV) led the advance, ending 16% higher on better-than-expected fourth-quarter earnings. Career Education (CECO) popped 11% and ITT Educational Services (ESI) surged 6%. Both stocks are laggards, though. The group started the week at a No. 50 ranking, but had slipped to No. 133 in Thursday's IBD, after sell-offs