Gossamer Bio Inc.’s finding of a subset of especially good responders in the phase IIb study called Leda may have taken some of the edge off two failures with GB-001, an oral DP2 antagonist undergoing tests in asthma and chronic rhinosinusitis. But the Street still wasn’t happy, and shares (NASDAQ:GOSS) of the San Diego-based  firm closed Oct. 13 at $10.09, down $3.50, or 26%.