South Korea After the Reset: Lee Jae-myung, Chip Sovereignty, and BoK Normalization

The six-hour martial law and the snap election #

The December 3, 2024, declaration was the first invocation of martial law in South Korea since 1980. Yoon framed the order as a response to Democratic Party obstruction of the budget and prosecutors, citing pro-North Korean forces. Within minutes, the National Election Commission, the National Assembly, and major newsrooms were ringed by troops from the 707th Special Mission Group and the Capital Defense Command. National Assembly Speaker Woo Won-shik convened a quorum of 190 lawmakers who climbed fences and pushed past military police. The vote to lift the decree carried 190 to 0 at 01:01 KST on December 4. Yoon rescinded the order at 04:30 KST.

The impeachment vote on December 14 carried 204 to 85, with 12 People Power Party defections delivering the two-thirds threshold. Han Duck-soo became acting president, then was himself impeached on December 27 over his refusal to appoint three Constitutional Court justices nominated by the Assembly. Finance Minister Choi Sang-mok took the acting role and served through Q1 2025. The Constitutional Court ruled 8 to 0 on April 4, 2025, upholding the impeachment and removing Yoon. The June 3, 2025, snap election returned a turnout of 79.4 percent, the highest in any presidential cycle since 1997. Lee Jae-myung took office the following day with no transition period.

The political settlement that emerges in 2026 is unusual. The Democratic Party holds 175 of 300 Assembly seats from the April 2024 general election, the executive branch, and a Constitutional Court rebalanced by Lee appointments. The People Power Party splintered into a Yoon loyalist wing and a reform wing under Han Dong-hoon, with the latter rebranded as the New Reform Party in late 2025. There is no near-term institutional check on the Lee program inside Korea, and the political cycle until the 2028 general election runs without an obvious veto point.

The Lee program: AI sovereign fund, K-content, basic income, chaebol governance #

Lee's economic platform is shaped by his Seongnam mayoral and Gyeonggi gubernatorial track record on basic income pilots and his decade of public contestation with the chaebol over Samsung succession and corporate governance. The 2025 supplementary budget passed in July 2025 carried a headline figure of 30.5 trillion won (roughly 22 billion dollars at the current spot), of which 12 trillion won funds an AI sovereign fund anchored at the Korea Development Bank, 4 trillion won funds K-content production guarantees through KOCCA, and 8 trillion won funds direct cash transfers calibrated regionally. The basic income debate is unresolved: the National Assembly Budget Office costed a national rollout at 73 trillion won annually, equivalent to roughly 3.0 percent of GDP, against the current welfare baseline of 13.7 percent of GDP per the Ministry of Economy and Finance.

The chaebol governance package introduced in October 2025 amends the Commercial Act to require board fiduciary duty to all shareholders rather than the company alone, mandates cumulative voting at firms above 2 trillion won in assets, and caps the cross-shareholding loop at 20 percent. The bill cleared committee in November 2025 and is pending plenary scheduling. Samsung Electronics, SK Group, Hyundai Motor Group, and LG Group together account for roughly 47 percent of KOSPI market capitalization per the Korea Exchange end-2025 data, and their preferred share discounts to common ranged between 21 and 38 percent at end-March 2026, suggesting the market has partially priced reform but not full convergence.

The AI sovereign program targets domestic foundation model capacity at Naver HyperCLOVA X, Kakao, LG AI Research, and KT, plus a sovereign GPU pool of 10,000 H200-equivalent accelerators procured through a 2 trillion won 2026 tender. The MOTIE white paper published February 2026 sets a 2030 target of 30,000 accelerators and three domestic foundation models above the 100 billion parameter threshold. Korea is the only OECD economy outside the United States with all three of fab capacity, memory leadership, and a sovereign foundation model program.

The chip stack: Samsung, SK Hynix, and the CHIPS Act bind #

Korean semiconductor exports reached 141.9 billion dollars in 2024, up 43.9 percent year on year per Korea International Trade Association data, and accounted for 21.0 percent of total goods exports. The 2025 outturn ran at 159.4 billion dollars, with HBM (high bandwidth memory) crossing 30 billion dollars in stand-alone export value for the first time. SK Hynix held an estimated 53 percent share of HBM3E shipments through Q4 2025 per TrendForce, with Samsung at roughly 32 percent and Micron at 15 percent. The Yongin Semiconductor National Industrial Cluster, broken ground in March 2024, carries a committed 122 trillion won (roughly 88 billion dollars) for four fabs through 2034, with Fab 1 first wafer in scheduled for 2027 and grid power requirements of 16 GW by 2046, exceeding current Seoul metro consumption.

Samsung's domestic stack centers on the Pyeongtaek campus (P1 through P4 operational, P5 in equipment install through 2026) and the Yongin Giheung legacy lines, plus the Hwaseong EUV pilot. The Pyeongtaek aggregate clean room area exceeds 1.6 million square meters, the largest single-site fab footprint globally per company filings. The 2024 foundry roadmap target for 2nm GAA HVP slipped from H2 2025 to H1 2026 per Q4 2025 earnings disclosure, and yield reports remain the single largest variance driver in the company's 2026 capex plan of 56.7 trillion won.

On the CHIPS Act side, Samsung's Taylor, Texas, project received a final award of 4.745 billion dollars in December 2024, down from the 6.4 billion preliminary memorandum signed in April 2024. The cut tracked a reduced US footprint plan, with the second Texas fab pushed from 2026 to 2027 first wafer. SK Hynix's West Lafayette, Indiana, advanced packaging facility received 458 million dollars in final award in December 2024, with construction begun in May 2025 and HBM packaging output targeted for H2 2028. The Lee government's posture toward the CHIPS Act regime has been continuity, with the Trade Minister stating in October 2025 that Korea will not reopen the framework but will press for parity with Taiwanese awards on a per-dollar capex basis.

BoK normalization: from 3.50 percent to a 2.50 percent terminal #

The Bank of Korea base rate path peaked at 3.50 percent in January 2023 after eight consecutive hikes from the August 2021 trough of 0.50 percent. The first cut came in October 2024 at minus 25 basis points to 3.25 percent, followed by minus 25 basis points in November 2024 to 3.00 percent. The MPC paused through Q1 2025 to manage post-martial-law won volatility, then cut by minus 25 basis points in May 2025 to 2.75 percent, where the rate held through Q1 2026. The MPC's February 2026 statement guided a single additional cut to 2.50 percent in 2026 contingent on US Federal Reserve trajectory and won stability.

The won closed 2024 at 1,472 to the dollar, the weakest year-end print since 2009. Through Q1 2026 the pair has oscillated in a 1,420 to 1,490 range, with the spike to 1,489 on December 27, 2024, marking the post-impeachment local extreme. The BoK and the National Pension Service have an FX swap line in place since November 2024 (initial 50 billion dollars, extended to 65 billion in March 2025) that has neutralized roughly 18 billion dollars of NPS dollar buying by routing it through the central bank rather than the spot market. Foreign reserves stood at 410.2 billion dollars at end-March 2026, down from 416.8 billion at end-November 2024.

Inflation dynamics remain benign. Headline CPI ran at 2.0 percent year on year in March 2026 per Statistics Korea, with core at 1.9 percent. Producer prices, which lead headline by roughly four months, ran at 1.6 percent in March 2026. Service price stickiness is the residual concern, with personal services at 3.4 percent year on year, pulled by post-pandemic catch-up in dining and personal care. The MPC's reaction function in 2026 weighs FX stability above the inflation gap, given that the 2.0 percent target is approximately met and that household debt to GDP, at 91.7 percent at end-2025 per BoK Financial Stability Report, constrains the room for accommodative policy.

Trade exposure: US tariffs, FDI commitments, and the Hyundai Metaplant #

The Trump second-term tariff schedule announced in February 2025 imposed a 25 percent levy on Korean automotive imports and a 25 percent levy on Korean steel and aluminum, with semiconductors initially exempt and placed on a Section 232 review track. Hyundai Motor and Kia together export roughly 1.05 million vehicles annually to the United States from Korea per KAMA data, and the tariff pass-through has materialized in a 7.2 percent average sticker price rise on US-bound shipments through Q1 2026. The buffer is the Hyundai Metaplant Georgia, which opened production in March 2024 and reached an annual capacity of 300,000 EVs by Q4 2025, with a planned expansion to 500,000 by 2028.

POSCO Holdings and Hyundai Steel face a more difficult adjustment. The 25 percent Section 232 steel tariff applies on top of pre-existing quotas, with the volume cap on Korean carbon and alloy flat product exports at 2.68 million tonnes annually under the 2018 quota that remains in force. Combined with the EU CBAM transition that ends free allocation in 2026, the Korean steel sector faces a layered adjustment that the MOTIE green steel roadmap costs at 28 trillion won through 2030 for the hydrogen-based DRI transition.

The semiconductor exemption is the variable most sensitive to US bilateral policy. A November 2025 Section 232 finding remains pending. The Korean industry's contingency planning, per the Korea Semiconductor Industry Association, anchors on three scenarios: full exemption, a 10 percent baseline on logic with HBM passthrough exemption, and a 25 percent symmetric tariff that would shift roughly 18 percent of Korean fab output to the Taylor facility under accelerated ramp.

Demographic compression and the conscription squeeze #

Korea's total fertility rate registered 0.72 in 2023 and 0.75 in 2024 per Statistics Korea (NSO) Vital Statistics, the lowest among all OECD economies and the lowest sustained reading globally. Births fell to 230,000 in 2023 and 238,000 in 2024, against deaths of 358,000 in 2024, yielding the fifth consecutive year of natural population decline. The 0.03 point uptick from 2023 to 2024 is the first annual increase since 2015 and traces to a marriage cohort effect from the deferred 2020 to 2022 weddings rather than a sustained behavioral shift.

The defense conscription pool, defined as 20-year-old males annually examined by the Military Manpower Administration, fell from 350,000 in 2020 to 230,000 in 2025 and is projected by the MMA to reach 180,000 by 2030 and 130,000 by 2040. The active-duty force ceiling of 500,000, set by the 2018 Defense Reform 2.0 plan, is mathematically untenable beyond 2032 under current service terms. The Lee government's January 2026 Defense White Paper introduces a partial volunteer transition with selective conscription, increased reserve roles, and a 2030 active-duty target of 380,000, the first downward revision of the standing force since the 1980s.

The fiscal arithmetic is binding. The National Pension Service projects fund depletion in 2055 under the 2024 Fifth Actuarial Review, against 2057 in the 2018 review. Lee's pension reform passed March 2025 raised the contribution rate from 9 to 13 percent over eight years and the income replacement rate from 40 to 43 percent, extending fund life to 2071 per NPS estimates. The reform clears the immediate solvency window but does not address the structural mismatch between a shrinking contributor base and an expanding beneficiary base, which the 2070 dependency ratio of 100.6 dependents per 100 working-age adults makes the central long-run fiscal variable.

North Korea: troops in Russia, ICBMs, and the Lee inter-Korean turn #

South Korean and US intelligence assessments converged through Q1 2025 on a deployed North Korean troop presence in Russia of approximately 12,000, comprising the XI Corps and Special Operations Forces elements engaged in Kursk Oblast and Donetsk operations. Casualty estimates from the National Intelligence Service in March 2025 ran at 4,000 killed or wounded, and the rotation pattern visible in satellite imagery of Rajin-Vladivostok shipping suggests continued reinforcement through 2026. The Russian payment package, per NIS estimates, includes air defense transfers (Pantsir-S1 systems), satellite assistance for the Malligyong-1 reconnaissance program, and roughly 3,000 dollars per soldier per month routed through Russian state channels.

Pyongyang conducted three Hwasong-19 solid-fueled ICBM tests in 2024 and one Hwasong-20 test in March 2026, the latter demonstrating an estimated 14,000 km range that places the entire continental United States within reach. The submarine-launched Pukguksong-6 program added a second Hero Kim Kun-ok class boat in late 2025. Tactical nuclear delivery systems demonstrated at the October 2024 parade and tested through 2025 include the KN-23, KN-24, and KN-25 short-range ballistic missiles modified for nuclear payloads, forming a complete tactical-strategic nuclear portfolio that did not exist in 2017.

The Lee inter-Korean policy reverses Yoon's posture. Lee suspended loudspeaker broadcasts at the DMZ in June 2025, halted leaflet flight enforcement, and reopened the inter-Korean liaison hotline in September 2025. The September 19 Comprehensive Military Agreement, suspended by Yoon in November 2023, has not been formally restored but the operational practices of buffer zones and overflight restrictions have been reinstated by ROK forces unilaterally since November 2025. Pyongyang has not reciprocated diplomatically as of April 2026, but DMZ provocations registered by the Joint Chiefs are at a five-year low.

Recommendations #

Chip sector buyers (hyperscalers, OEMs, automotive Tier 1s) should lock HBM and DDR5 allocations through 2027 with both Samsung and SK Hynix on a dual-source basis. The HBM3E supply-demand gap closes only in H2 2027 on consensus. Single-source exposure to either Korean producer through 2026 carries unhedged tail risk from the Section 232 review and from intra-Korean labor cycles around the Commercial Act amendment. The Taylor facility ramp gives a US-domiciled fallback for advanced logic but not for HBM, where the West Lafayette packaging line is the only US-based Korean asset and starts in H2 2028.

FX hedgers and corporate treasurers operating won exposures should structure forward books with reference to the BoK-NPS swap line as a soft floor and the 1,500 level as a hard intervention threshold based on observed BoK behavior in December 2024 and February 2025. Option strategies that pay above 1,500 are mispriced relative to the implied volatility surface, and the carry on dollar-funded won-paying positions is asymmetric given the BoK guidance to one further cut against four cuts priced into the OIS curve through 2027.

Multinationals with Korean operations should assume the Commercial Act amendment passes in H2 2026 and recalibrate joint venture and supply contract clauses that depend on chaebol board structure. Cumulative voting and shareholder fiduciary duty meaningfully alter the negotiation posture of Samsung and SK family councils. Foreign direct investors evaluating greenfield Korean capacity should weight the Yongin power and water requirements (16 GW peak demand, 1.4 million tonnes per day water) against the underlying grid constraint that KEPCO has flagged in three consecutive long-term planning documents.

Geopolitical risk officers in firms with Korean exposure should treat the 2027 G2 trade rebalancing as the binding scenario, not the 2024 baseline. Korea's combined chip, auto, and steel exposure to US tariff action covers roughly 38 percent of total goods exports per KITA 2025 data. The Lee government's negotiating leverage rests on the AI sovereign fund and the chip cluster, not on traditional alliance management. A Korea-US trade framework refresh in H2 2026 is the base case in our scenario tree.

Sources #

• Bank of Korea, Monetary Policy Decisions and FSR
• Statistics Korea (KOSTAT), Vital Statistics and CPI
• Ministry of Economy and Finance, Korea
• Ministry of Trade, Industry and Energy (MOTIE)
• National Election Commission, June 3, 2025 results
• Constitutional Court of Korea, decision 2024Hun-Na8 (April 4, 2025)
• Korea International Trade Association (KITA), trade statistics
• Korea Semiconductor Industry Association
• US Department of Commerce, CHIPS Program Office, Samsung and SK Hynix award announcements
• Yonhap News Agency
• Reuters, Seoul bureau
• Financial Times, Korea coverage
• TrendForce, HBM market share
• Korea Automobile Manufacturers Association (KAMA)
• National Pension Service, Fifth Actuarial Review (2024)
• Military Manpower Administration, Korea