Most Sector Leaders put in gains Thursday amid mixed results in the general market. Valeant Pharmaceuticals (VRX) rallied 4.42, or 3%, to 138.13 in fast trade. The stock has bounced back in mostly large volume as a new base forms. But the base would be a more risky late-stage structure. The Canadian drugmaker will announce Q1 earnings before the open on Thursday. Valeant is expected to earn $1.72 a share, up 32% from a year ago.