Investopediaยท2025-11-14 21:25Core Insights - Cidara Therapeutics shares surged over 100% following Merck's acquisition announcement for $9.2 billion, reflecting a significant premium of 109% over the previous closing price [1][3][7] - The acquisition aims to enhance Merck's portfolio in antiviral treatments, particularly through Cidara's leading drug candidate, CD388, which is in Phase 3 trials targeting influenza A and B [1][3][7] - Merck's CEO expressed confidence in CD388's potential to drive growth and create shareholder value over the next decade [3] Company Performance - Cidara's stock reached its highest level in nine years, trading at approximately $218, compared to around $14 a year ago, indicating a substantial increase in market valuation [3] - Merck's shares experienced a slight increase of about 1%, although they remain in negative territory for 2025 [4] Market Implications - The acquisition exemplifies how larger companies value unique assets from smaller firms, highlighting the potential for significant returns in the biotech sector despite inherent risks [2]