SAN FRANCISCO – Investor sentiment around Biogen Inc.'s plan to soon seek approval for aducanumab in Alzheimer's disease yielded a clear bold reaction in its rising share price Tuesday. But a more nuanced reading was floated during a CNS panel at the BIO Investor Forum the day after, where a focus on new modalities and a call for open-mindedness carried the conversation. "It almost doesn't matter what investors think," said Ellen Lubman, a panelist and chief business officer of Impel Neuropharma Inc. "The reality is that if truly there's a percentage of people getting a benefit from the drug... that's the reason we're all in this business."