Alphabet

Reddit Uses LLMs to Combat AI-Generated Spam

Reddit said it has developed and deployed tools that leverage large language models (LLMs) to detect and remove spam and coordinated inauthentic activity on its platform. The company claims its updated LLM-driven systems block roughly 23 million spam views per day and identify about 25,000 new spam posts and comments daily. Reddit reported a 20% reduction in user exposure to spam from January–March compared with the prior three months and says LLMs help catch subtle, coordinated fake behavior older systems missed. The article notes broader platform trends — other social platforms permit AI-generated content with disclosure and emphasize that automated moderation benefits from human oversight for best results.

US Dominates Top 100 Companies Ranking with AI

A study by EY published July 3, 2026, finds the AI boom has driven major gains for technology firms: the market capitalization of the world's largest tech companies rose 30% year-to-date to $35.2 trillion, while the total market value of the top 100 companies increased 18% to $61.9 trillion. Nvidia remains the most valuable company ($4.846 trillion), followed by Alphabet, Apple, Microsoft and Amazon. IPO newcomer SpaceX entered the ranking at sixth with a $2.25 trillion valuation. TSMC is the highest-ranked non‑US company, and only one German firm — Siemens (rank 72, $247.5 billion) — remains in the top 100; SAP fell to rank 114. The report highlights a widening lead for US tech players and structural challenges for European tech scaling.

AI Winners Drive Market Rotation in Holiday Week

CNBC analysis covering the holiday-shortened week of U.S. markets highlights a rotation into new AI beneficiaries after a strong first half of 2026. Cybersecurity stocks, led by Palo Alto Networks and CrowdStrike, rallied after reporting that Chinese AI models can identify code vulnerabilities, and after the U.S. lifted export restrictions on Anthropic’s Claude Fable 5 and Mythos 5 models. Meta Platforms surprised investors by preparing a cloud infrastructure business to sell excess AI compute and models, boosting its shares. The CNBC Investing Club repositioned its portfolio: exiting Nike, trimming high-flying positions (Palo Alto, Corning), and adding FedEx and newly spun-off FedEx Freight; Goldman Sachs initiated coverage on FedEx Freight with a buy and $186 target. Major indexes were mixed but finished the week higher overall.