Analyst review of NVDA issues and MNL portfolio changes8 May 2026 05:13
There are documented issues with Nvidia's Vera Rubin (sometimes called Rubin or VR) platform rollout, primarily supply and technical challenges rather than fundamental design flaws.
Key points from recent reports (as of early-mid 2025):HBM4 memory bottlenecks: Delays in qualifying and scaling high-bandwidth memory (HBM4) from suppliers like SK Hynix and Micron. This has led analysts (e.g., TrendForce, KeyBanc) to cut expected 2026 Rubin GPU shipment share from ~29% to ~22% of Nvidia's high-end GPUs, with production potentially reduced from ~2M to ~1.5M units.
Other engineering hurdles: Higher power consumption, advanced liquid cooling requirements, networking transitions (e.g., CX8 to CX9), and overall rack-scale integration complexities in the unified Vera Rubin platform.
These are short-to-medium term headwinds (next few months/into 2026 ramp), not existential. Nvidia has a strong track record of overcoming them, and Blackwell continues to drive revenue. Rubin is still expected to ship in volume in H2 2026 with big efficiency gains (e.g., much higher performance per watt).
iMark Sheppard (@MLCapMan) explicitly cited these rollout struggles, over-specification in the rack-scale design, potential near-term market share losses to AMD/others, and the need to reduce single-stock concentration risk (from an extreme ~42% to 24.5%). He remains bullish long-term, targeting $500 NVDA in 3 years, but wants more patience and diversification.
This aligns with broader market chatter: It's a real but manageable setback in a supply-constrained AI boom.
On the new holdings layout/preferencesReducing NVDA from ~42% to ~24.5% (still by far the largest position) and broadening exposure makes sense for risk management in an investment trust. Extreme concentration worked well in the AI rally but amplifies downside on any hiccup (supply delays, competition, valuation resets).
From recent factsheets/portfolio updates, the shift includes:Keeping big core AI names like Broadcom (~11%) and TSMC (~10%).
Adding/increasing diversified plays: VanEck Semiconductor ETF, Morgan Stanley Broad AI Basket, stronger Bloom Energy (data center power), and AMD entering top holdings.
I prefer the new, more diversified layout. 40%+ in one stock is aggressive even for a tech-focused trust—reducing it while staying heavily AI-exposed lowers volatility without abandoning the thesis. It gives breathing room for other winners (e.g., if AMD gains share short-term or power/infra names like Bloom run). Sheppard has a history of decisive moves (e.g., slashing Microsoft earlier), which has generally served the trust well over time.Bottom line: The concerns are valid and public (not obscure), justifying a trim. Long-term, Nvidia's AI dominance looks durable, but diversification here is prudent. Always check the latest factsheet/newsletter from M&L Capital for full deta
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