5 things to know before the stock market opens Tuesday, February 4

Here are five key things investors need to know to start the trading day:

Shares of Merck dropped more than 7% in early morning trading Tuesday after the pharmaceutical giant issued full-year 2025 revenue guidance that fell short of Wall Street’s expectations. The company said its decision to halt shipments of Gardasil — its key vaccine that prevents cancer from HPV — to China was behind the lower forecast. But Merck topped fourth-quarter estimates, reporting adjusted earnings of $1.72 per share and revenue of $15.62 billion. Pfizer also reported its fourth-quarter results before the bell.

Good news cord-cutting sports fans: Fox will stream Sunday’s Super Bowl 59 on its free, ad-supported service, Tubi. It’s the first time football’s biggest game will be available on a platform like Tubi, and Fox is hoping the move will boost the fledgling streamer’s credibility. Tubi’s viewership and revenue have slowly gained ground since Fox bought the platform in 2020 for $440 million, but Fox executives believe there’s still room for its streamer to grow. “It’s still a bit of an unknown to many consumers,” Fox CFO Steve Tomsic said in December.

— CNBC’s Sean Conlon, Pia Singh, Yun Li, Annie Palmer, Kif Leswing, Annika Kim Constantino, Diana Olick, Jeff Cox and Lillian Rizzo contributed to this report.