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Major high-frequency trading firms are increasing AI compute spending—buying cloud contracts, building data centers, and investing in startups. Jane Street invested $1 billion in CoreWeave and committed $6 billion to its services, Hudson River Trading says it spends about $1 billion a year on AI, XTX is building a Finland data center, and Jane Street led funding for chip startup Etched and became its first customer.
arXiv will limit submissions to two papers per person per calendar month beginning Oct 1, 2026 (the existing cap of three active submissions remains). The rule — which counts rejected papers toward the limit unless deleted — responds to a surge in submissions (40,363 in Sept 2026) partly driven by AI tools and is intended to ease overload on volunteer moderators handling many low-quality, micro-result, and AI-written papers.
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