AI investment plans and policy risks shape a quiet Sunday

U.S. markets were closed for the weekend, leaving QQQ and SPY unchanged from Friday's close. Nvidia said its previously discussed investment of up to $100 billion in OpenAI was never a commitment, while Oracle planned to raise as much as $50 billion to expand AI cloud infrastructure. Debate over Kevin Warsh's nomination as Federal Reserve chair and the start of a partial U.S. government shutdown kept policy risk in focus. Germany's December retail sales rose 0.1% from the prior month versus a 0.1% decline expected, and January manufacturing PMI improved to 49.1 from 47.0.