Let There Be Light

Citrini · Citrini Research · March 12, 2026 at 12:30 · ⏱ 4 min read  | Read on Substack ↗
TLDR
The author reviews their successful early call on the AI optics and connectivity supply chain, noting that their connectivity basket has significantly outperformed as infrastructure bottlenecks became apparent. While suggesting it may be time to take profits on some extended early winners, they believe the next phase of the AI trade lies further down the stack in photonics components and capital equipment. • Hyperscaler AI capital expenditures are estimated to reach $650B–$700B in 2026, driving relentless infrastructure buildouts. • The author correctly predicted that optical interconnects and co-packaged optics (CPO) would become major AI bottlenecks. • The author's connectivity basket has tripled since publication, recently outperforming their interconnects basket. • Market appreciation has shifted towards optical interconnects at the expense of traditional interconnect names like Astera Labs and Credo. • The author suggests taking profits on some early optics winners that are now priced for perfection. • New, less-crowded opportunities are emerging in next-generation photonics components, substrates, and capital equipment.
Full Analysis
{
  "tldr": {
    "summary": "The author reviews their successful early call on the AI optics and connectivity supply chain, noting that their connectivity basket has significantly outperformed as infrastructure bottlenecks became apparent. While suggesting it may be time to take profits on some extended early winners, they believe the next phase of the AI trade lies further down the stack in photonics components and capital equipment.",
    "key_points": [
      "Hyperscaler AI capital expenditures are estimated to reach $650B–$700B in 2026, driving relentless infrastructure buildouts.",
      "The author correctly predicted that optical interconnects and co-packaged optics (CPO) would become major AI bottlenecks.",
      "The author's connectivity basket has tripled since publication, recently outperforming their interconnects basket.",
      "Market appreciation has shifted towards optical interconnects at the expense of traditional interconnect names like Astera Labs and Credo.",
      "The author suggests taking profits on some early optics winners that are now priced for perfection.",
      "New, less-crowded opportunities are emerging in next-generation photonics components, substrates, and capital equipment."
    ]
  },
  "trade_ideas": [
    {
      "ticker": "LITE",
      "direction": "LONG",
      "confidence": 0.70,
      "sentiment": 0.75,
      "quote": "Our connectivity basket has more than tripled since we published it... And it’s not done yet – the basket is up 35% YTD, led by now favorite Lumentum (LITE US).",
      "thesis": "Lumentum is the leading and currently favored name in the author's connectivity basket, which continues to benefit from the AI-driven optics shortage and infrastructure buildout.",
      "instrument": "shares",
      "timeframe": "medium-term"
    }
  ]
}
Read time 4 min
Length 4,763 chars
Category finance
Trade Ideas
Citrini Substack author, Citrini Research
Lumentum is the leading and currently favored name in the author's connectivity basket, which continues to benefit from the AI-driven optics shortage and infrastructure buildout.
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This newsletter, published March 12, 2026, features Citrini discussing LITE. 1 trade idea extracted by AI with direction and confidence scoring.

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