Coherent Inc (COHR) — Quality & forensics

Long reads

• Optical Interconnects — The Toll Nobody KeepsReport · 13 Aug 2026On Friday, Coherent fell 11.8% through its 50-day average on no numbers at all.
• Portfolio Construction — Build a Barbell · Closelook Heresy IIIHeresy · 16 May 2026Live cohort as of May 2026: COHR · CRWV · GLW · INTC · IREN · LITE · MRVL · NBIS · NOK · SNPS.
• Pattern 03 — NVIDIA Strategic Authority InvestmentReport · 12 May 2026Tier 2 typically appears bundled inside Tier 1 events: Lumentum's capacity-access rights, Coherent's purchase commitments, and IREN's 5 GW deployment partnership all rode in on the same 8-Ks as the equity investments.
• Nvidia’s Equity Stakes — Follow the Wise Men, Pattern 03 PreviewWeekly Signal · 10 May 2026Coherent has moved from $50 in April 2025 to $335.26 today.

101 and glossary

• Networking & Optical Interconnects: The Constraint After Compute101NVIDIA’s networking stack (acquired via Mellanox), Broadcom’s switching silicon, Marvell’s interconnect IP, and the optical transceiver ecosystem (Lumentum, Coherent, Fabrinet) all benefit from the same physical reality: at cluster scale…
• Optical TransceiverGlossaryA device converting electrical signals to optical for fiber networking; LITE, COHR, and FN are pure-play beneficiaries.
• Strategic Authority Investment: Reading the Jensen Huang Roadmap101Forward watchlist: LITE, COHR, FN (optical), MU (memory), VRT, GEV (power), PSTG, NTAP, WDC (storage).

Dailies

• Day after the hike — yields fall and the lines are retaken: 10-year 4.95%, chips +3% over $505, S&P ETF above $757.83Midday 10 · 17 Sept 2026Chips, the design side wider: AMD +6.4% to $545.38, Micron +5.5% to $977.94, Broadcom +2.9% to $349.39, Nvidia +2.3% to $218.74, TSMC +2.1% to $425.93; memory ETF +4.4% to $57.63; optics pause — Lumentum −0.4% at $916, Coherent +1.2%
• Rates — the Fed hikes and the 10-year closes above 5%: the belly sold, the relief unwound, chips back under $505Morning 10 · 17 Sept 2026Inside chips the day was not one story: optics and interconnect were bought hard — Lumentum +9.6%, Credo +7.4%, Coherent +6.9%, Astera Labs +6.6%, Soitec +13.4% in Paris — and the equipment names were sold again, Applied Materials −1.4%…
• AI trade — sellers of compute sold, buyers bought: chips −5.6%, software +5%, SoftBank +7% in TokyoMorning 10 · 15 Sept 2026The $505 line is gone: semiconductor ETF $497.40, below Thursday’s $517.43 and 6.4% under its 50-day at $531.52; memory and storage led on the way down again — Micron −5.3%, SanDisk −5.0%; Corning −13.7%, Teradyne −13.3%, Coherent −12.7%…
• Oil knocks on $100 and Wall Street sells everything but the AI pipe: Intel +9%, Lumentum +11%, Dow −1.2% — Seoul buys the dip and the Kospi is back above 7,000Morning 10 · 9 Sept 2026Intel +9.1% on another CPU price rise, AMD +5.9%, Broadcom +3.0%, and the optical names went vertical — Lumentum +11.0%, Corning +7.6% on an 80-million-mile fibre contract with Verizon, Coherent +7.1% — while Shopify, UiPath and Atlassian…
• Chips up again, software down again — Friday's split is turning into a trendMidday 10 · 8 Sept 2026Lumentum up 12%, Corning 10%, Coherent 10%, Intel 9%
• Chips jump 3% while software falls 2% — the hot jobs report has split the tech trade in twoMidday 10 · 4 Sept 2026SanDisk, KLA, Super Micro Computer, Coherent and Marvell are all higher by roughly 6% to 10% at midday — memory, chip-making equipment, servers, optical connectivity and custom silicon.
• The Yield March Breaks Three Decades of LinesDaily Pulse · 1 Sept 2026
• Verdict day two: six earnings windows close as MongoDB and GitLab printMorning 10 · 1 Sept 2026COHR & AMAT — scanner support confluence