South Korea Daily Briefing

📈 Korea Surges 6.2% — HBM/Semicap AI Demand Recovery and Bank Re-Rating Drive Broad Advance With Zero Net Losers

Tuesday delivered one of Korea's sharpest single-session rallies in recent memory. iShares MSCI Korea (EWY) surged 6.16% to 172.90, gaining 10.04 points on zero net losers among major movers — a breadth reading that reflects genuine institutional buying rather than a few outlier names pulling the index. This is a bull session by any measure, and the drivers are structural rather than noise. The semiconductor thesis is the primary engine. Korea is the world's dominant supplier of High Bandwidth Memory (HBM) — the specialized DRAM architecture at the center of the AI compute stack that NVIDIA, AMD, and Google TPU require to run large language models at scale. On Tuesday, US markets delivered a clean AI compute recovery signal: SMCI surged 15% on SpaceX datacenter orders, AMD gained 8.11%, and Intel added 8.64%. When those names move like that, the direct derivative trade is Korea's Samsung Electronics and SK Hynix — the two companies that manufacture essentially all HBM. EWY's 6% move is the Korea channel's expression of the same AI infrastructure investment thesis that drove US semis. Semiconductor price acceleration is adding to the thesis: a Chosun Ilbo analysis citing Shin Hyun-song's indicator — flagged as 'the most important market metric to watch' — reports that the rate of semiconductor price increases is accelerating further. For investors in Korean semicap names, this is the NIM equivalent of what rising JGB yields mean for Japanese bank stocks: structural improvement in the earnings environment, not just a sentiment bounce. Banks also had a strong day. KB Financial (KB) +4.22%, Shinhan Financial (SHG) +4.05%, Woori Financial (WF) +2.04%. The driver here is the same rate-normalisation trade visible in Japan, but with a Korea-specific inflation edge: June PPI came in at +8.6% YoY — matching May's reading and holding at the highest level since July 2022's 9.2% peak. With Korea's producer price inflation this elevated, the BoK cannot cut rates, and elevated short-term rates translate directly into bank NIM expansion. KB, SHG, and WF are all rate-sensitive names benefiting from 'higher for longer' being locked in by the inflation data. Korea Electric Power (KEP) +3.62% is the AI data center infrastructure angle. As hyperscalers race to build compute capacity in Korea — attracted by Korea's semiconductor supply chain and submarine cable connectivity — KEPCO becomes the power infrastructure play. AI data centers are power-intensive at scale, and KEPCO is the primary grid operator. LG Display (LPL) +2.19% rounds out the gains — display recovery tied to consumer electronics demand and OLED cycle positioning. Credit quality watch: Korean bank delinquency rates are rising. May data showed overall delinquency at 0.67% (+0.06pp MoM), while SME loan delinquency broke through 1%. New delinquencies in May totalled ₩3.3 trillion (₩400B more than April). This is a credit quality signal worth monitoring — the same BoK rate environment that expands bank NIM also pressures borrower debt service capacity. For banks, it means the NIM expansion trade has a credit quality offset that limits the upside. Inflation policy: President Lee ordered the oil price cap (최고가격제) be strengthened rather than phased out as originally planned, citing ongoing Middle East tensions (Brent at $91.01, +2.01% — a 5-week high driven by US-Iran strikes and Houthi Red Sea blockade threats). The government will announce the 8th maximum oil price on July 24. This is a domestic demand stabilisation move that protects consumer purchasing power but also signals the government views $91 oil as genuinely risky for Korean inflation. K-beauty structural win: South Korean medical aesthetics and skincare companies (Rejuran, Shrink, Restylane/Ritu'O equivalents) are expected to post all-time record Q2 results, driven by: surging inbound foreign tourist volumes (high KRW exchange rate attracting visitors), K-beauty tourism becoming a mandatory itinerary item, and direct overseas sales expansion. This is the K-wave economy — cultural soft power translating to measurable corporate earnings. Cultural milestone: Go master Shin Jin-seo defeated KataGo AI by 4.5 points — the first professional to beat a top-tier AI in a high-stakes match — setting up a decisive third game. Not a market catalyst but a reminder that Korea's technology and talent ecosystem operates at the frontier. Forward look: The BoK's next meeting will be watched for any dovish pivot given that SME delinquency is rising even as PPI stays elevated. The semiconductor earnings cycle (Samsung and SK Hynix results) is the most important near-term catalyst. If SMCI's datacentre order flow continues, HBM demand signals will remain positive and EWY has room to consolidate these gains rather than give them back.