Pfizer (PFE)

Shares of biotechnology company Moderna (NASDAQ:MRNA) fell 4.8% in the afternoon session after competitors Pfizer and BioNTech announced positive topline results for their updated 2025-2026 COVID-19 vaccine formula. The data from Pfizer and BioNTech showed their vaccine produced a robust immune response, signaling continued strong competition in the COVID-19 vaccine market. 

Pfizer and BioNTech's LP.8.1 COVID-19 vaccine boosts antibodies 4-fold in high-risk adults, with no new safety concerns reported.

The company is working on a treatment for a form of epilepsy that tends to be difficult to control.

Unprofitable companies face headwinds as they struggle to keep operating expenses under control. Some may be investing heavily, but the majority fail to convert spending into sustainable growth.

Summit Therapeutics stock crashed Monday after the company's drug failed to meet the bar for overall survival in lung cancer.

The market may have been too quick to dismiss this biotech's pipeline prospects after a recent trial result.

Pfizer's stock is down nearly 60% from its post-pandemic peak, opening up an opportunity for the right long-term investors.

The company might be close to commercializing its most advanced pipeline program.

It's unprecedented times for the Covid vaccine market, experts say. And Pfizer and Moderna remain under significant pressure.

Viking aims to enter the billion-dollar weight loss drug market.

Secretary for Health and Human Services, Robert F. Kennedy Jr., faced bipartisan backlash during a combative Senate hearing on Thursday, as both Republicans and Democrats criticized his controversial vaccine policies and the abrupt firing of Centers for Disease Control and Prevention Director Susan Monarez.

Explore the S&P500 index on Thursday and find out which stocks are the most active in today's session. Stay updated with the stocks that are capturing market interest.

These stocks are cheap in more ways than one.

Pfizer has a lofty 6.9% dividend yield, but is it the only or best choice for investors interested in the pharma space?

California, Oregon and Washington form regional vaccine alliance to counter federal guidance under Robert F. Kennedy Jr. as Florida eliminates state mandates.

Market swings can be tough to stomach, and volatile stocks often experience exaggerated moves in both directions. While many thrive during risk-on environments, many also struggle to maintain investor confidence when the ride gets bumpy.

Florida plans to end all statewide vaccine mandates, even those required for school attendance, framing the move as a defense of individual liberties, which has since received pushback from public health experts.

Pfizer lauded “Operation Warp Speed” for helping the country save over $1 trillion in healthcare costs due to a reduction in serious illnesses and subsequent hospitalizations.

Stay informed about the most active S&P500 stocks in today's session as we take a closer look at what's happening on the US markets on Tuesday. Discover the stocks that are generating the highest trading volume and driving market activity.

Over $11 billion flowed into the popular healthcare sector ETF XLV in Q2 alone, suggesting smart money is positioning for a potential rebound.

With an average yield above 6%, these stocks could do a lot to raise your passive income stream.