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S tock index futures were mixed on Wednesday after technology stocks dragged Wall Street lower in the previous session. Here are the five news items investors should watch: G20 trade tensions with China deepen: Treasury Secretary Scott Bessent said 19 of the G20 members agreed on the need to address cheap exports that contribute to global trade imbalances, with China opposing the approach. China’s current-account surplus reached a record $1.2T in 2025, underscoring the scale of the issue for global trade and U.S. policy. Diesel prices hit highest since 2022: U.S. diesel futures climbed Tuesday to their highest level since April 2022, while the diesel crack spread reached a record above $106/bbl as global fuel supplies tightened. Retail diesel prices have also risen to $5.63/gal, according to AAA, raising the prospect of another record and adding pressure to transportation and other fuel-intensive businesses. AI drives unprecedented data center investment: Global data center spending could reach $31.6T through 2050 as demand for AI computing capacity expands, according to PwC. The total could approach $50T if AI adoption exceeds the firm’s central forecast, highlighting the enormous capital requirements facing hyperscalers, utilities, chipmakers, and other companies supporting the AI infrastructure buildout. U.S. pushes limited AI regulation: The U.S. is urging G20 nations to avoid broad new AI rules and dedicated regulatory agencies, with technology adviser Michael Kratsios promoting the administration’s “Carolina Principles.” The framework favors regulation focused on novel situations while encouraging foundational research and commercial development, potentially shaping how major markets approach AI oversight. Palo Alto sees cybersecurity overhaul: Palo Alto Networks ( PANW ) CEO Nikesh Arora said AI could force companies to rethink roughly $1T of legacy cybersecurity infrastructure that was built before AI-driven threats emerged. The company beat fiscal Q4 estimates and issued a strong outlook, while Arora said automated attacks could accelerate vulnerability discovery and increase demand for modern security systems.