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A timeline of key AI-market and legendary-investor developments — structured, dated, and sourced.

⚠ Disclaimer:For education and information only. Not investment advice.
  1. AI Memory & StorageCompute & AI ChipsMUSNDKSKHYWDC

    Memory stocks enter a bear market: Micron, Samsung and SK Hynix all down 20%+ from highs

    In the week of July 13–17 the memory chain went from hottest trade to bear market: SanDisk fell 12.6% on Monday and another 8% Thursday to close at $1,354.82 on 7/17 (roughly -35% from its $2,000+ June peak); Micron closed at $848.95; Micron, Samsung, SK Hynix and the Roundhill Memory ETF are all 20%+ below recent highs. SKHY — SK Hynix’s ADR, public for just a week — faded from a +19% spike on 7/14 (the day its leveraged ETFs launched) to $154.03, only 3.4% above the $149 IPO price. Profit-taking is the main driver: Micron was up as much as 244% YTD and SanDisk 640%, while TrendForce sees 3Q26 contract-price gains slowing to +13–18% for DRAM and +10–15% for NAND (vs +90–95% and +58–63% the prior two quarters).

    Sources: Yahoo Finance — Micron, Samsung, SK Hynix drag memory stocks into a bear market · 24/7 Wall St — traders take profits in memory stocks (7/15) · TrendForce — 3Q26 memory contract-price outlook (7/3) · stockanalysis.com — SNDK price history

  2. Compute & AI ChipsAI Applications & PlatformsCRWVTSLAGOOGLAMDAMZN

    Cathie Wood buys the dip: adding CoreWeave in the sell-off, with 30% of ARK in 5 AI stocks

    As memory and AI-compute names corrected, ARK leaned in: Wood kept buying CoreWeave through the mid-July sell-off. Roughly 30.4% of Ark Invest’s portfolio now sits in five AI stocks — Tesla, SpaceX, Alphabet, AMD and Amazon. Among the eight tracked investors Wood remains the most aggressive buy-the-dip bull, a sharp contrast with the drawdown in Druckenmiller’s new memory positions the same week (he rotated into SNDK/STX/MU in Q1 — see the 7/14 entry).

    Sources: The Motley Fool — Cathie Wood is doubling down on this AI stock during the sell-off (7/13) · The Motley Fool — 30% of Cathie Wood’s portfolio in 5 AI stocks (7/16)

  3. AI Applications & PlatformsCloud & AI InfrastructureGOOGLAMZNAAPL

    Berkshire’s great pivot: Amazon exited, Alphabet boosted 225%

    The Q1 2026 13F shows Berkshire cutting its book from 40 to 26 names with 15 full exits: Amazon sold entirely, Alphabet boosted 225% as its clearest AI statement, and Apple untouched (still 22%) after three quarters of trimming. Under Abel, Berkshire is concentrating AI exposure into search cash flow + full-stack AI.

    Sources: Seeking Alpha — Tracking Berkshire portfolio Q1 2026 · Forbes — Berkshire shifts as Abel reshapes the playbook

  4. AI Memory & StorageCompute & AI ChipsSNDKMULRCXAMATAVGO

    Hedge funds rotate into the memory chain: record 10% semis weight, SanDisk tops new VIP names

    Goldman’s Hedge Fund VIP list rebalanced in late May: about half of the biggest popularity gainers are AI-linked, led by SanDisk, Lam Research and Applied Materials; hedge-fund semis weight hit a record ~10% with momentum exposure at the 90th percentile. The same quarter, Druckenmiller exited Alphabet for SNDK/STX/MU/AVGO — institutions are widening “picks and shovels” from GPUs to memory and equipment.

    Sources: Goldman Sachs — Hedge Fund Trend Monitor: All in on AI · HedgeFundAlpha — hedge funds pile into AI infrastructure · HeyGoTrade — Druckenmiller dumps GOOGL for storage names

  5. AI Energy & PowerCloud & AI InfrastructureAI Memory & StorageGEVTSM

    Sovereign wealth pours in: MGX closes a $49B AI fund

    Sovereign funds have committed ~$120B across 2025–26 to data centers, fabs and HPC networks; Abu Dhabi’s MGX closed a $49B AI fund on July 1, with roughly 30% of allocations aimed at building national champions. For public markets, sovereign capital raises the capex floor under AI infrastructure (power, equipment, storage) — AI and energy are merging into one infrastructure story.

    Sources: Titan Investors — sovereign wealth funds commit $120B to AI buildout · Forbes — how sovereign wealth funds are shaping AI

  6. AI Applications & PlatformsCompute & AI ChipsNVDAGOOGL

    AI agents are enterprise software’s new frontier: Agentforce ARR up ~330%

    AI agents (autonomous multi-step task completion) are 2026’s hottest enterprise-software theme: Salesforce’s Agentforce grew ARR ~330% to about $540M; Microsoft (Copilot/Azure AI Foundry), Alphabet, and Nvidia are the main exposures. But CFOs are tightening AI budgets — from open-ended experiments to “show me the ROI” — which will separate monetization from storytelling.

    Sources: US News — Best agentic AI stocks & ETFs to buy in 2026 · MarketScale — CFOs tighten AI budgets as agentic platforms reshape enterprise AI

  7. AI Energy & PowerCloud & AI InfrastructureAMZNGOOGL

    AI’s power gap lifts nuclear: data centers racing toward 12% of U.S. electricity

    Data centers are seen rising from ~4.4% of U.S. electricity at end-2023 toward ~12%; solar/wind intermittency can’t meet AI’s baseload need, so nuclear is repriced. Microsoft, Amazon, Google, and Meta have signed nuclear PPAs; uranium holds near $86/lb; grid queues stretch eight years and nearly half of planned AI data centers face transmission delays. A classic second-order AI theme.

    Sources: The Motley Fool — AI is creating a nuclear power renaissance (2026) · MarketWise — Best nuclear energy stocks as AI drains the grid

  8. Physical AI & RoboticsCompute & AI ChipsNVDATSLA

    Physical AI is the market’s new theme: humanoids called a $40T arena

    Jensen Huang calls humanoids a ~$40T market and robotics Nvidia’s second growth curve after AI; Nvidia launched Halos (a full-stack robotics safety system) in June; SoftBank’s Son calls physical AI the next trillion-dollar birthplace. Listed pure-plays are scarce (Figure, Unitree private), with exposure concentrated in Nvidia, Tesla, UBTECH, Xiaomi, Hyundai, and an ETF (KraneShares KOID).

    Sources: 24/7 Wall St. — Huang: humanoid robots a $40T market · CNBC — Humanoid robots touted as next AI investment opportunity

  9. AI Applications & PlatformsCompute & AI ChipsNVDANFLXMETA

    Coatue’s Laffont explains his biggest AI trade

    Running ~$22.7B, Laffont trimmed Nvidia and Meta and added application leaders (e.g., Netflix), shifting toward AI-driven, higher-certainty monetization.

    Sources: CNBC — Laffont explains his biggest AI trade

  10. Cloud & AI InfrastructureCompute & AI ChipsAMZNNVDAMU

    Tepper trims Nvidia, doubles Amazon — betting on AI monetization

    Appaloosa nearly doubled Amazon into its top position on accelerating AWS, while trimming Nvidia and AMD and adding Micron — a rotation from compute toward where AI revenue lands.

    Sources: 24/7 Wall St. — Tepper trimmed Nvidia/AMD, doubled an AI stock

  11. Compute & AI ChipsAI Applications & PlatformsChina AINVDAPLTRPDD

    Duan Yongping leans into AI: adds Nvidia & Alphabet, opens Palantir

    In Q1, Duan made Nvidia his #3 position and opened Palantir, Synopsys, CrowdStrike and Snowflake while exiting Alibaba and CoreWeave — a value investor tilting toward AI.

    Sources: 腾讯新闻 — 段永平 Q1 持仓

  12. Cloud & AI InfrastructureAI Applications & PlatformsAMZN

    Rare consensus: Buffett and Cathie Wood both own Amazon

    Two very different investors both hold Amazon — dual “picks-and-shovels + application” exposure that monetizes AI as cloud revenue — a rare consensus name.

    Sources: Motley Fool — Buffett & Wood both own Amazon

  13. AI Applications & PlatformsCloud & AI InfrastructureAMZNGOOGL

    Druckenmiller keeps adding Amazon & Alphabet, avoiding the crowded trade

    The macro legend added AMZN and GOOGL for two straight quarters rather than Nvidia or Palantir — rotating toward where AI revenue shows up.

    Sources: Motley Fool — Druckenmiller buys AMZN & GOOGL

  14. Compute & AI ChipsCloud & AI InfrastructureNVDAAMZNGOOGL

    Custom silicon share rises, challenging Nvidia’s merchant GPUs

    Hyperscaler custom accelerators (Trainium, TPU, Maia) are projected to rise from ~21% (2025) to ~28% (2026) of the market, eroding merchant GPU share over time.

    Sources: IO Fund — Nvidia thesis & competitive share

  15. Compute & AI ChipsNVDA

    Nvidia Blackwell ramps; AI-chip opportunity points to $1T by 2027

    Nvidia still holds an estimated 85–92% of AI accelerators; management points the 2027 AI-chip opportunity to at least $1T, with Blackwell’s rollout central to the thesis.

    Sources: Intellectia — Nvidia 2026 AI demand outlook

  16. AI Energy & PowerCloud & AI InfrastructureCRWV

    Cathie Wood bets on nuclear as AI’s energy base layer

    Beyond AI compute (CoreWeave, Cerebras), ARK invested heavily in nuclear (e.g., X-Energy), framing data-center power scarcity as the next bottleneck and opportunity.

    Sources: TheStreet — Wood buys Amazon / X-Energy

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