Mapping Late Expansion — Reading the Semiconductor Cycle Through Four Lenses

If you had to capture the semiconductor market in May 2026 in one sentence: the numbers are at all-time highs, but the market is already asking the next question.

We are reading four signals simultaneously. First, spot data remains explosive. Second, market sentiment has not caught up with reality. Third, hidden cracks in the supply chain are starting to surface. Fourth, analyst consensus is moving almost unidirectionally higher. Cross these four, and you arrive at a conclusion: we are in Late Expansion — but "peak" does not mean "decline."

Spot Data: A Boom of Historic Proportions

Korea's semiconductor exports (HS 8542) hit $25.2B in April, up +158% YoY — more than 2.5x the $9.8B recorded twelve months prior. A single product category, HBM, has fundamentally altered Korea's export structure.

DDR5 16Gb spot prices sit at $41.67, flat through all of May at the $41 level. Exports are up 158% while DRAM prices rose just 1.2% — this divergence means the boom is driven by volume explosion, not price hikes. HBM operates on a separate pricing structure from commodity DRAM.

Looking at 10-day stock momentum: SK Hynix +18.6%, Samsung +12.7% — Korean memory names dominating. TEL +6.4%, TSMC +2.4%, while NVIDIA fell -2.7% despite record $81.6B revenue. KOSPI broke 8,000, making Korea the world's 7th-largest equity market.

Sentiment vs. Fact: The Market Hasn't Caught Up

The narrative-vs-fact divergence gauge is sending an interesting signal. Fact Ahead appeared for three consecutive days (May 22–24) before shifting to Aligned on May 25–26. The fact index sits at 74–80 while sentiment lingers at 54–58.

The implication: news tone is not fully reflecting the strength of underlying data. Of 1,169 articles in May, Korea's positive:negative ratio is 230:125, Taiwan's is 224:49 — overwhelmingly positive, yet peppered with "peak-out" warnings. The market acknowledges the boom while questioning its sustainability.

Supply Chain Tension: Normal — But T1 Bears Watching

The tension index reads Normal (T1=63.3, T2=40.0). Not overheating, but T1 (customer-supplier temperature gap) is approaching the upper neutral bound. This suggests NVIDIA's GPU demand exceeding supply is pushing cost pressure downstream to memory and packaging.