The Plumbing Print — While the Index Whipped 3,000 Points, Taiwan's Power, Cooling, Rail and Module Layer All Printed Record Mays at Once
As foreigners dumped a record NT$93.85B in one session and TAIEX futures plunged 3,006 points, every Taiwan name in the layer between TSMC and the GPU — power, thermal, rail, chassis, module memory — booked simultaneous May records at +37% to +210% YoY.
One-line thesis
Three sessions (Jun 6 – Jun 9) collapse into a single observation: the TAIEX printed history's 3rd-largest point drop (-1,568pt, -3.48%) and then history's 8th-largest gain (+1,201pt), while every Taiwan May revenue report released during those same three days — across the AI infrastructure "plumbing" layer of power, cooling, rails, chassis and module memory — set a simultaneous all-time high. Price discovery and unit economics have not moved this far apart at any other point in this cycle.
What happened — the plumbing's simultaneous record
The filings dropped after the close and read like a single sentence. GPU and foundry margins are still being repriced; the plumbing under the GPU has already been repriced.
- Delta Electronics (2308) May revenue NT$58.96B (+43.65% YoY); 5M cumulative NT$277B (+37.99%). Chairman Ping Cheng formalized a "Grid to Chip" vertical-integration stack at Computex the same week.
- Lite-On Tech (2301, untracked) May +29.56% YoY with the cloud segment alone up ~80% YoY.
- Auras (3017, untracked) May NT$15.87B (+60.6% YoY) — AI server cooling.
- King Slide (2059, untracked) May NT$3.79B (+172% YoY, +46% MoM), limit-up — server rails.
- Chenbro (8210, untracked) May NT$2.52B (+37.3% YoY, +21.8% MoM), limit-up at NT$1,510 — server chassis.
- Yen Sun (6275, untracked) scaling Dongguan fan-module capacity to 600K units/month, Q3 ramp — server fans.
- ADATA (3260, untracked) May NT$12.94B (+210% YoY, +22.6% MoM), 3rd straight monthly record; 5M YTD already at 93% of full-year 2025.
- Macronix (2337, untracked) May +175.8% YoY, with NOR/SLC NAND contract prices guided to nearly double in Q2.
The headline tape over the same 72 hours was the opposite. Friday's SOX -10.26% rout dragged TAIEX into a record 2,694-point intraday plunge on Monday and a single-session foreign sell of NT$93.85B (~US$2.9B, 7th-largest ever). Twenty-four hours later, Jensen Huang's "now cheap to buy" remark in Seoul triggered a +1,201pt rebound (8th-largest gain ever).
Why it matters — not a derivative cycle anymore, a separate cycle
Wistron (3231) May +39% YoY (NT$290B) and Quanta (2382) May +94% YoY (NT$311.5B, same-month record) are no longer first-derivative reads on GPU shipments. Stack the surrounding stories — , , , , — and they all point in the same direction. Per GPU, the surrounding BOM is getting thicker every quarter, and that thickening the plumbing layer's revenue.
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