US Semiconductor and AI Stocks Plunge on China's Moonshot Kimi K3 Shock

테크주 | Sat Jul 18 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 13 sources

Moonshot AI's Kimi K3 release fueled concerns about narrowing US-China AI gap, driving semiconductors into a bear market and Apple surpassing Nvidia in market cap.

Analysis

[Moonshot AI] unveiled Kimi K3 open model ^[1][10]

• World's largest open model with 2.8 trillion parameters
• Ranked #1 on Arena Frontend Code leaderboard
• Model weights to be released by July 27
• Surpassed Claude Opus 4.8 and GPT-5.5 benchmarks

[Semiconductor Sector] entered bear market with worst weekly decline ^[6][11][7]

• Retracement of rally that more than doubled over 3 months
• VanEck Semiconductor ETF fell approximately 4%
• Arm dropped 5%+
• Micron
• AMD
• Broadcom each fell 5%+
• Worst weekly performance in a year

[Apple] surpassed Nvidia as world's largest company by market cap ^[2][9]

• Reclaimed title held by Nvidia since May 2025
• Apple up 23% in 2026
• Nvidia gained only 9%
• HSBC upgrade to buy and AI roadmap reassessment

[Nvidia] denied Vera Rubin system delay rumors ^[8]

• Jensen Huang: "Already in production
• at scale"
• $1 trillion revenue target for Vera Rubin and Blackwell in 2026-2027
• Expected significant reduction in AI inference costs
• 12-month median price target of $300

[Oracle] recorded all-time high credit risk ^[3]

• Concerns over aggressive cash burn
• Doubts about AI investment profitability
• Intensifying competition from Chinese models like Kimi K3
• Pressure from emergence of models rivaling OpenAI

[Global Markets] experienced broad sell-off on 'DeepSeek Moment' recurrence fears ^[11][4][5]

• SoftBank plunged 9%
• Tokyo Electron down 8%+
• TSMC fell 7.29%
• SK Hynix dropped 11%+
• Emerging market equities entered technical correction
• Retail investors hit by leveraged ETFs

[Alphabet] shares fell 4% on Gemini 3.5 Pro launch delay report ^[12]

• Coding performance falling short of internal expectations
• Competitive disadvantage vs. new OpenAI and Meta models
• First unveiled at Google I/O in May
• Testing underway with partners

[Fireworks AI] raised $1.5 billion at $17.5 billion valuation ^[13]

• Annualized revenue exceeded $1 billion (5x YoY)
• Surging demand for open-source model hosting
• Partnership with Microsoft Foundry
• Supports DeepSeek
• MiniMax
• and Z.ai models

Sources

• [1] Meet Kimi K3, the newest Chinese AI model haunting Silicon Valley - MarketWatch Top Stories
• [2] Apple Briefly Tops Nvidia as World’s Most Valuable Company - Bloomberg Markets
• [3] Gauge of Oracle’s Credit Risk Hits Fresh All Time High - Bloomberg Markets
• [4] ‘Sea of Red’ Hits Emerging Stocks as AI Concerns Jolts Markets - Bloomberg Markets
• [5] AI Upheaval Crushes Retail Traders Crowding Into Leveraged Funds - Bloomberg Markets
• [6] Chips Stocks Sink Into Bear Market as 105% AI Rally Fizzles - Bloomberg Markets
• [7] US chip stocks notch up worst week in more than a year - Financial Times
• [8] Jensen Huang Denied Delay Reports for Nvidia's Vera Rubin AI Systems - The Motley Fool
• [9] Apple, Nvidia vie for title of world's most valuable company - CNBC World Markets
• [10] Chinese AI has leveled up, and brought renewed focus on the open weight model shift - CNBC World Markets
• [11] SoftBank sinks over 9% as Asia chip stocks track Wall Street AI sell-off - CNBC World Markets
• [12] Alphabet shares fall on report its most powerful AI model Gemini 3.5 Pro is delayed - CNBC World Markets
• [13] Nvidia-backed Fireworks hits $17.5 billion valuation as companies pursue cheaper AI models - CNBC World Markets