K-Chips & Batteries Weekly — 2026-10-30

2026-10-30 · market

Korean equities experienced an aggressive late-week selloff on Friday, with the benchmark KOSPI falling -3.48% and the tech-heavy KOSDAQ dropping -3.83% on the day. Despite this steep single-day drawdown, the trailing five-day period revealed stark internal dispersion across Korea’s two pillar export sectors: semiconductors and rechargeable batteries. While both spaces carry substantial monthly damage—reflected in median 20-day declines of -28.20% in semiconductors and -10.49% in batteries—the week saw concentrated buying in select mega-caps and niche material specialists, contrasted with severe liquidations among mid-cap equipment providers and chemical component suppliers.

Semiconductors: Memory Mega-Caps Decouple from Domestic Equipment

The semiconductor complex exhibited a pronounced bifurcation this week between leading memory producers and domestic equipment and component vendors. Heavyweight SK Hynix outperformed with an +11.88% five-day gain, supported by resilient sentiment surrounding high-bandwidth memory (HBM) supply chains. Integrated device manufacturer Samsung Electronics advanced +4.68%, while test socket manufacturer ISC rose +5.02%, reflecting steady institutional demand for high-end packaging and testing infrastructure.

Conversely, domestic equipment and proprietary component suppliers faced heavy selling pressure. High-pressure annealing specialist HPSP was the week’s primary laggard, tumbling -10.75%. Precision test pin manufacturer Leeno Industrial shed -8.65%, and silicon carbide (SiC) ring producer TCK fell -8.46%. The stark divergence between the frontline memory manufacturers and their downstream supply chain underscores that broad-based capital expenditure confidence remains muted. With the median 20-day return across Korean semiconductor equities standing at -28.20%, this week’s memory rebound operated primarily as a narrow, large-cap stabilization rather than an industry-wide recovery.

Rechargeable Batteries: Cell Manufacturers Diverge from Foil and Electrolytes

Korea’s battery supply chain displayed similar polarization over the five-day period, against a backdrop of a -10.49% median 20-day return. Carbon nanotube (CNT) conductive additive supplier Nano Materials led all covered names with a +12.98% return, while cell manufacturer Samsung SDI rallied +11.66%, benefiting from a short-term rebound after extended sector-wide valuation compression. Further up the value chain, cathode producer POSCO Future M recorded a modest gain of +1.19%.

In sharp contrast, manufacturers tied to battery foils and specialty electrolytes bore the brunt of ongoing market de-risking. Lotte Energy Materials dropped -16.94% over the week, making it the sector’s weakest performer, while copper foil peer SKC retreated -13.15%. Electrolyte salt and additive producer Chunbo also slid -6.81%. The steep underperformance in foil and chemical producers reflects persistent market concerns over sluggish European electric vehicle demand, protracted utilization rate adjustments, and inventory overhangs that continue to weigh more heavily on intermediate materials than on integrated cell makers.

The Week Ahead: What to Watch

The domestic corporate earnings and guidance calendar is relatively light over the coming week following the bulk of recent operational updates. With company-specific catalysts limited, foreign institutional order flow and macro cues will likely drive direction. Market participants will focus on whether large-cap memory names (SK Hynix and Samsung Electronics) can maintain their support levels after Friday’s broader index selloff, as well as tracking preliminary ten-day trade export data for early indications of semiconductor and secondary battery shipment volumes.

This note was produced by Chip & Cell’s data pipeline with model-assisted analysis. It is not investment advice; verify all figures against primary sources.

Not investment advice. Figures are as of publication and may contain errors — see methodology.