Should You Buy This Blue Chip Pharmaceutical Stock That Just Popped 3.8%?

Core Viewpoint - Merck is showing signs of recovery after facing challenges in its vaccine business and competition for its key drug, Keytruda, with recent developments boosting its prospects and share price [1][2]. Group 1: Recent Developments - Merck's acquisition of Acceleron Pharma for $11.5 billion has led to the approval of sotatercept, a treatment for pulmonary arterial hypertension (PAH), which has generated $976 million in sales in the first nine months of 2025 [3][4]. - Sotatercept has successfully completed a phase 2 study for combined post- and precapillary pulmonary hypertension (CpcPH), a rare condition with no current approved treatments, potentially adding over $1 billion to annual sales if it passes phase 3 studies [5][6][7]. Group 2: Strategic Acquisitions and New Products - Merck's acquisition of Cidara Therapeutics for approximately $9.2 billion will provide access to CD388, a potential therapy aimed at improving influenza vaccine efficacy [10][11]. - The company is also awaiting FDA approval for a combination treatment for HIV, which could further enhance its product portfolio [12]. Group 3: Financial Performance and Market Position - Merck's current market capitalization stands at $260 billion, with a gross margin of 75.81% and a dividend yield of 3.09% [12]. - The company has increased its dividend payouts by 84.7% over the past decade, positioning itself as a reliable blue-chip income stock [15].