Stocks wobble as UnitedHealth plunges and Corning jumps on a major Meta deal
U.S. stocks swung in mixed trading as investors digested uneven earnings, a steep drop in UnitedHealth, and a surge in Corning after a large agreement tied to Meta’s data-center buildout.
A split market under the surface
U.S. markets zigzagged on Tuesday, January 27, 2026, with major indexes moving in different directions as earnings and sector-specific news pulled investors in competing directions. The S&P 500 edged higher and flirted with record territory, while the Dow slid and the Nasdaq rose, reflecting how concentrated leadership has become in the market.
The day’s action illustrated a common late-earnings-season pattern: headline index strength can hide turbulence beneath the surface, especially when one large company collapses and another surges.
Health insurers get hit after UnitedHealth’s outlook
UnitedHealth shares sank sharply after investors focused less on the quarter’s profit and more on forward-looking signals, including a revenue forecast that came in below what many on Wall Street expected. The drop spilled into other health insurance names as traders reassessed the sector’s margin outlook.
The selloff underscored how sensitive insurers remain to government payment expectations and medical-cost pressures. Even when companies deliver near-term results, guidance can reset sentiment quickly if investors believe reimbursement trends will be tighter than anticipated.
Corning surges as AI infrastructure demand drives orders
On the other side of the ledger, Corning jumped after announcing a deal worth up to $6 billion with Meta Platforms to supply optical fiber and cable for data centers. The agreement also includes plans to expand manufacturing capacity in North Carolina, highlighting how AI-era infrastructure is translating into large industrial orders.
The contrast between UnitedHealth and Corning captured the market’s current divide: companies tied to digital infrastructure and data-center spending are being rewarded, while businesses facing policy-driven margin constraints are being punished.
What investors are watching next
Traders are now looking to upcoming earnings from several major technology companies, as well as the Federal Reserve’s next interest-rate decision. With inflation still a central concern, markets are attempting to price the pace and timing of any potential rate cuts later in 2026.