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Merck (MRK) Slides After the Bell on December 9, 2025: Keytruda Biosimilar Jitters and What to Watch Before the December 10 Open
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Merck (MRK) Slides After the Bell on December 9, 2025: Keytruda Biosimilar Jitters and What to Watch Before the December 10 Open
Note: This article is for informational purposes only and does not constitute investment advice. Merck stock recap: What happened on December 9, 2025? Merck & Co., Inc. (NYSE: MRK) closed Tuesday, December 9, 2025 at $96.89, down 2.06% on the day, after trading between an intraday low of $96.06 and a high of $99.85. Volume was elevated at about 15.3 million shares, above recent averages, signaling active institutional and trader participation. S…
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