The AI Order Book, Read From Taiwan

South Korea spent Monday closed for the Liberation Day observance, and the region barely noticed. Hong Kong ran +1.6% to 25,516 into this morning's China data, Taipei added +0.4%, Tokyo +0.3% on a narrow session — the Asian legs that were open kept carrying, which is exactly what the weekend's Weekly Signal said they would need to do.

Underneath that session sits the question every AI-capex position ultimately rides on: are the orders still flowing through the supply chain? Taiwan is the one place on earth that answers this monthly, by law — every listed company files audited operating revenue by the 10th of the following month. No analyst estimates, no guidance language. A hard number, every month, from every supplier that matters.

As of today the diary reads that answer on its own surface: the AI-Order Signal Board, live in the Lab. Two boards with different jobs. Board A watches five price tripwires daily across the supply-chain layers — substrate, power and thermal, interconnect, assembly, silicon — measured against a six-name control leg of deliberately non-AI Taiwan electronics, so island-wide cyclicality cannot masquerade as an AI signal. Board B reads the monthly revenue filings, layer by layer. A fires often and points; B fires rarely and decides.

Day one, the revenue side is unambiguous. Every layer is accelerating on a three-month rolling basis: substrates +38% year over year, power and thermal +51%, the server assemblers +60%, silicon +47%. The July prints that landed this weekend are the sharpest of the set — liquid-cooling specialist Auras filed revenue up 117% from a year ago, and laser-chip maker LandMark Optoelectronics up 177%. The chain is not merely shipping; it is shipping faster than its own prior year at every stage.

The price side is where it gets interesting. Four of the five wires are quiet — breadth is healthy at 69% of the basket above its 50-day average, the basket is outrunning the control leg, the upstream-versus-assembler spread flipped back positive in Monday's session. But one wire is lit: cross-sectional dispersion of 20-day returns sits in the top quartile of the trailing year, at 25.7% against a 17.7% threshold. The names inside the basket are separating — some ripping, some fading — inside a narrative the revenue prints still score as a single trade.

Rising dispersion with healthy breadth usually reads as substitution rather than contraction: the market starting to pick which suppliers win the next architecture, not walking away from the complex. That is a question, not a warning — and the board's design law is that a warning requires the two boards to disagree, price sensing something the filings have not yet shown. Today they do not disagree. The point of the surface is to be watching on the morning they do.

The board joins the Taiwan AI Supply Pulse and the rest of the AI Build-Out family in the Lab. None of it is a recommendation — it is the diary's instrumentation for a trade it already holds, published as it runs.