Consensus Cracked — The Week Foreign Brokers Raised the CoWoS Chain 17–36% and Cut Pure DRAM Even as Nanya Printed 621% YoY

Consensus Cracked — CoWoS Chain Lifted, Pure DRAM Cut in the Same Week

In the week ending July 3, Taiwan's consensus resolved into two different directions in hard numbers. Mizuho Securities lifted its 2026 CoWoS wafer-capacity estimate for TSMC (2330) from 120k to 140k monthly wafers — a 16.7% expansion — and pegged its target at NT$3,000. Goldman Sachs raised MediaTek's (2454) target 36% to NT$6,800, implying 57% upside from print. UBS lifted ASE Technology's (3711) target from NT$660 to NT$835 (+26.5%) on CoWoS second-sourcing and LEAP-revenue acceleration. FactSet's twelve-analyst poll on Yageo (2327) moved the median target from NT$975 to NT$1,040 (+6.7%), and its Phison (8299) survey held target at NT$3,000 while nudging 2026 EPS consensus from NT$332 to NT$340.55.

Same week: FactSet's fourteen analysts on Nanya Technology (2408) cut the target 6.5% to NT$428. Eleven analysts on Winbond (2344) cut 15.3%, from NT$236 to NT$200. And Nanya's June revenue print — NT$29.4B, +621% YoY, +6.2% MoM — landed exactly on the metrics that would ordinarily anchor a supercycle re-rating.

Anatomy of the Paradox

Consensus is reading two different physics. CoWoS is a physical bottleneck — Mizuho's 120k→140k revision is the arithmetic expansion of 2026 AI-server capacity. TSMC's CoWoS lines, ASE's advanced-packaging second sourcing, and MediaTek's AI-ASIC slot all funnel revenue into the same channel. When the wafer count moves 20k, the whole chain re-rates. Yageo's lift and Phison's controller anchor extend the same logic into CCL/MLCC/module layers — each a fresh row in the AI-server BOM.

DRAM is different. Nanya's +621% YoY print reflects a low base and a DDR5 spot rally ($46.633 for 16Gb on July 3), but consensus has already priced this rally. FactSet's cuts are not about revenue but about ceilings — how much further can this go. Apple's talks with Pentagon-blacklisted CXMT and YMTC to source memory for China-only iPhones, Tim Cook's "once-in-a-century flood" framing, and pushback from US lawmakers — this geopolitical noise clips the consensus premium on pure-DRAM foundries. Winbond, more geared to specialty DRAM and NOR, absorbs the sharper cut.

ETFs Vote With Their Feet

The market started pricing the two physics separately. Taiwan's high-dividend ETF 00918 completed its mid-year rebalance by dumping 13 holdings — including Yageo (+397% H1) and UMC (+234% H1) — and rotating into AI servers. On July 2, UMC (2303) was placed on Taiwan Stock Exchange disposition status through July 15 after a 31% ten-day surge. The parabola got throttled.

Foreign investors sold a net NT$89B (~US$2.7B) of Taiwan equities the same day, flipping even TSMC to a net-sell of 12,200 lots. The TAIEX opened down 1,037 points and rallied back — a whipsaw kicked off by the Philadelphia Semi Index's 5%+ overnight rout and Meta's "Meta Compute" announcement (renting surplus AI capacity), which briefly triggered peak-cycle fears. Consensus direction, though, was already set.