Stock Market 12 December 2025

Definium announced positive results from its Phase 3 Emerge trial for DT120 in major depressive disorder, achieving an 8.1-point placebo-adjusted benefit after six weeks. Its shares (DFTX) were quoted at $40.19 premarket on Nasdaq. CRH is acquiring Arcosa for $150 per share in cash, valuing the Dallas-based infrastructure group at nearly $8.5 billion, expanding CRH’s U.S. aggregates and energy transmission equipment presence. Yum Brands is selling Pizza Hut in deals totaling $2.7 billion, exiting the brand as its U.S. business lags competitors. Creator marketing is becoming central to U.S. media budgets, with ad spending projected to reach $44 billion in 2026. Jersey Mike’s topped the 2026 American Customer Satisfaction Index for quick-service restaurants, ending Chick-fil-A’s 11-year run at the top. SpaceX will join the Russell 1000 index, with JPMorgan estimating about $4 billion in passive buying. Super Micro Computer rose in premarket after a Buy upgrade and a $48 price target from GF Securities, following its AI-server financing package. AT&T hovered near its 52-week low ahead of Q2 earnings. Pfizer’s CFO Dave Denton will depart in August, with Cecile Guegan stepping in as interim CFO. American Airlines shares rose on lower jet fuel prices after U.S.-Iran talks eased oil concerns, with airlines expected to use savings to improve margins. Sandisk gained on sector momentum after Apple’s memory-cost warning. China blocked dual-use exports to several U.S. entities, impacting Red Cat and Teal Drones. Nokia shares declined as the company works through an AI-infrastructure rerating. Brent crude dropped 3.9% on renewed U.S.-Iran talks, with managed money shorts at pandemic highs. U.S. equity futures fell as traders focused on rates and inflation data. Keel Infrastructure rose on Russell index timing and leasing business bets. Micron gained ahead of its fiscal Q3 report, with strong EPS expectations. NVIDIA slipped 0.5% premarket amid broader market moves, not company-specific news. AI stocks advanced, with SK Hynix surpassing Samsung as South Korea’s largest listed company.