We told you first: up +135% in June, this AI materials play is now up +612%

The article highlights a powerful AI supply-chain rally, led by Kingboard Holdings' +135.43% move this month and +612.12% return since being identified in February 2025. Kingboard announced a HK$11.77bn ($1.5bn) stake sale in its laminate subsidiary and its fifth product price hike of 2026, with proceeds earmarked for PCB capacity expansion and R&D. The piece also cites strong gains across AI-related names such as Tokyo Electron (+45.74% in June) and Megaport (+43.28% in June), underscoring broad momentum in the theme.

Analysis

The market is pricing this as a simple AI beta trade, but the more interesting setup is a second-order capacity cycle in the semiconductor materials stack. The strongest beneficiaries are not the headline chip designers; they are the niche suppliers with pricing power tied to AI server BOM intensity, where incremental demand is forcing customers to accept higher input costs and longer lead times. That makes the upside in MRVL, ONTO, and ALGM more durable than a one-quarter momentum burst because each sits closer to the spending decisions of hyperscalers and equipment makers.

The biggest medium-term risk is that the narrative becomes self-limiting: if capex keeps accelerating, the market will eventually start discounting peak margin, peak order visibility, or a normalization in shipment timing. ONTO is especially exposed to any digestion phase in advanced packaging and inspection demand, while MRVL’s upside depends on the market continuing to reward AI networking and custom silicon exposure rather than rotating back to mega-cap GPU pure plays. AMRX and ALGM look more like sentiment beneficiaries than direct AI winners, so they may underperform if investors become more selective about earnings quality.

The contrarian read is that the rally is still under-owned in the “picks-and-shovels of picks-and-shovels” names, especially where guidance can reset estimates upward without needing a new product cycle. That argues for staying long the suppliers with visible backlog and operating leverage, but fading the more speculative parts of the basket on strength. In particular, the market may be underestimating how long AI infrastructure spending can keep compounding before supply catches up; the real reversal trigger is not valuation alone, but evidence that equipment lead times, pricing, and order growth are decelerating simultaneously.

Key Decisions for Investors

• Long MRVL vs short SMH on a 3-6 month horizon: MRVL has the cleanest leverage to AI networking and custom silicon without relying on a single hyperscaler narrative; use a 2:1 reward/risk with a stop on any AI capex miss.
• Buy ONTO on pullbacks for a 6-12 month hold: best positioned for an advanced-node / packaging upgrade cycle, but size modestly because the name is vulnerable to order digestion if equipment spending pauses.
• Pair long ALGM / short a broader semi basket for 1-2 quarters only if you want a sentiment trade: ALGM should lag on any rotation from AI-adjacent momentum to earnings quality, so this is more of a tactical relative-value expression than a core long.
• Avoid chasing AMRX here; if you want exposure, use it only as a short-term momentum trade with tight risk controls since it lacks a direct catalyst linkage to the AI infrastructure spend cycle.
• Use any sharp gap-up in MRVL or ONTO to sell covered calls 30-45 days out; the implied move is likely to outrun near-term fundamentals, creating better risk-adjusted income than outright adds at current levels.