Merck (MRK) stock slips into 2026 as New Year holiday shuts U.S. markets — what investors watch next
Merck closed Dec. 31 down 0.75% at $105.26, then edged up to $105.40 after hours. U.S. markets are shut Thursday for New Year’s Day. The S&P 500 and Nasdaq each fell about 0.75% in thin year-end trading. Investors now look to the JPMorgan Healthcare Conference on Jan. 12-15 and Merck’s Feb. 3 earnings.