Summit Therapeutics (US:SMMT) The Motley Foolยท2025-06-11 21:28Core Viewpoint - Summit Therapeutics' stock experienced a significant decline of over 11% following a negative assessment from analyst Daina Graybosch of Leerink Partners, who initiated coverage with an underperform rating and a price target of $12 per share, nearly 40% below the recent closing price [1][2]. Group 1: Analyst's Assessment - Daina Graybosch's report highlighted concerns regarding ivonescimab, a cancer drug licensed from Akeso, indicating that despite positive results in a clinical study against Merck's Keytruda, the drug may not capture sufficient market share to justify Summit's high stock valuations [4][5]. - The analyst noted that ivonescimab is not the first drug of its kind, which could lead to increased challenges in achieving clinical success, regulatory approval, and sales [5]. Group 2: Market Dynamics - Summit's stock price volatility is closely tied to developments surrounding ivonescimab, with the potential for large addressable markets in various cancer types, suggesting that the company's prospects should not be dismissed solely based on current valuations [6].