Why Merck Stock Is Plummeting Today

Shares of Merck (MRK -9.51%) were trading lower on Tuesday. The company's stock had lost 10.1% as of 2 p.m. ET, but was down as much as 12.5% earlier in the day. The drop comes as the S&P 500 gained 0.5% and the Nasdaq Composite gained 1.1% on the day.Merck's stock sank after the company reported fourth-quarter and year-end 2024 earnings this morning. Although it narrowly beat Wall Street's revenue targets, weak guidance for 2025 disappointed investors.The numbersFor Q4 2024, Merck reported global sales of ...