Benefit for patients with disease that has spread to the brain put a special shine on top-line data rolled out by Seattle Genetics Inc. (Seagen) from the HER2Climb study, an experiment to test the oral small-molecule tyrosine kinase inhibitor (TKI) tucatinib, designed as highly selective for HER2 without significantly knocking down EGFR.

While the general markets are leaning toward positive territory following a quiet summer period, the enthusiasm for biopharma equities remains muted. One of the most closely monitored therapeutic areas is oncology. Earlier this year, public companies developing innovative medicines in that area had enjoyed strong support; however, investors now appear to be more selective in backing companies in that sector.

Shares of Seattle Genetics Inc. (NASDAQ:SGEN) rose 12.4% to $85.40 on news that an antibody-drug conjugate (ADC) it is developing with Tokyo-based Astellas Pharma Inc., when combined with Keytruda (pembrolizumab, Merck & Co. Inc.), shrank tumors in the majority of people participating in a phase I first-line bladder cancer study.