Won 800tn Semiconductor Mega Cluster, Won 4,700tn AI Korea Blueprint Unveiled — Even Drives US Chip Equipment Stocks

The KOSPI rose about 1.3%, breaking through the 8,500 level and marking a new intraday all-time high. Foreign investors sold a net roughly won 2 trillion, but buying from individuals and institutions offset the outflow and pushed the index higher.

The KOSDAQ, which had surged more than 8% the previous day, pulled back about 1% and traded around the 911-point level. Foreign investors sold roughly won 250 billion, apparently locking in profits.

As of the morning session, Samsung Electronics rose about 2.7%, SK hynix turned positive, and Samsung Electro-Mechanics gained around 7%. Semiconductor-related materials, parts and equipment stocks were the clear drivers of the index gains.

The National Pension Service's estimated domestic equity weighting currently stands at around 30%, already exceeding the 28.8% upper bound even after accounting for its strategic and tactical flexibility band (plus or minus 8 percentage points). With the second half of the year beginning in July, market watchers expect selling pressure from rebalancing to be unavoidable.

Estimates of the required selling amount vary widely by source, but analysts pegged the minimum at won 27 trillion with the KOSPI at 8,000, won 51-52 trillion at 8,500, more than won 70 trillion above 9,000, and up to won 120 trillion at 10,000. Fully utilizing the strategic and tactical flexibility band, however, could reduce these figures by 20-30%.

Because the pension fund's portfolio is concentrated in large-cap stocks, a sudden dump would hurt its own returns, so analysts expect it to sell gradually during periods of high volatility rather than all at once to minimize market impact. Selling pressure of roughly won 30-60 trillion is expected to unfold in stages within the current index trading band.

Still, panelists noted that such supply-demand concerns are a recurring short-term phenomenon seen in Japan and Taiwan during periods of rapid index gains, and have historically been overcome as fund flows shift and corporate earnings improve — suggesting investors should not be overly gripped by fear.

Samsung Electro-Mechanics announced it signed a won 450 billion supply contract for AI server MLCCs. The counterparty is presumed to be a North American cloud hyperscaler, with the contract running from January through December next year. Market watchers called the scale of the order unusually large, and the stock jumped about 8%.

With reports that each AI data center server rack requires roughly 600,000 MLCCs, concerns over MLCC supply shortages and potential price hikes intensified. Japan's Murata signaled it would raise prices starting in July.

Samhwa Capacitor (presumed) surged nearly 17%, while related materials, parts and equipment names such as Avatec and Kocheep also gained more than 7-9%. Prices for MLCCs, capacitors, PCB materials and industrial gases are all expected to rise broadly starting July 1.

TrendForce's June semiconductor price data also showed month-over-month price increases ranging from 10% to more than 30% depending on the item, suggesting the price uptrend is spreading from memory chips to components and materials.

Following the government's announcement the previous day of a semiconductor mega cluster investment plan, Samsung Electronics and SK hynix jointly pledged roughly won 800 trillion in investment. A total of four new memory fabs will be built, two each by Samsung and SK hynix.

The news sent US semiconductor equipment stocks sharply higher. Among S&P 500 constituents, Applied Materials rose about 10%, Lam Research about 8%, and KLA Corporation about 11%. Micron, by contrast, fell as much as 10% early in the session before paring losses.

The ostensible trigger for Micron's early decline was news that US consumers had filed a price-fixing lawsuit against the three major memory makers — Samsung Electronics, SK hynix and Micron. However, the panel argued the lawsuit's logic was weak, since the current price increases stem from surging demand rather than any coordinated supply restriction.

Semiconductor expert Lee Kwang-soo argued that the massive fab investment announcements by Samsung and SK hynix themselves signal confidence in demand at least through 2027-2028, and that this was the very factor that lifted Micron's stock back up. He characterized it as a phenomenon in which Korea's investment announcements are now driving global chip market sentiment.

The government unveiled a won 4,700 trillion AI Korea blueprint to build industrial hubs nationwide. Regionally, Songdo will specialize in bio, South Chungcheong in HBM, Gwangju in semiconductors, Gumi in AI data centers and robotics, Ulsan in energy storage systems (ESS), and Geoje in shipbuilding.

The semiconductor mega project's core rests on three pillars: investment scale, speed, and ecosystem. The southwestern region alone will see won 800 trillion in investment, with won 81 trillion earmarked for HBM packaging in the Chungcheong region; more than won 30 trillion will go to semiconductor R&D over 15 years, and the government will create a won 2 trillion special semiconductor account in 2027.

On speed, the plan targets doubling DRAM production capacity within five years. SK hynix will shorten construction timelines by 12 months and Samsung Electronics by seven months; Samsung's Pyeongtaek fabs 5 and 6 in particular will shift from sequential to simultaneous construction, cutting an additional three to four years off the schedule.

On ecosystem-building, the southeastern and Daegu-Gyeongbuk regions will be developed as innovation hubs for materials, parts and equipment suppliers, alongside workforce training initiatives and discussion of a national defense semiconductor act. Samsung Electronics will invest roughly won 140 trillion in its Gwangju semiconductor plant and Chungcheong HBM processes, while basing its robotics and battery push in the Yeongnam region; SK hynix will invest about won 400 trillion in its southwestern semiconductor plant and an additional won 100 trillion near Cheongju, with its emphasis on expanding AI data centers.

AI data centers will be built in a first phase totaling 8.4GW and won 550 trillion through 2029, with a second-phase expansion also planned. The goal is for Korea to capture 25% of Asia-Pacific AI data center capacity by 2030. In physical AI, the plan targets commercialization by 2028, developing humanoid robots specialized for 10 major industries centered on Saemangeum.

It took the KOSPI 86 days to climb from 3,000 to 4,000, 63 days from 4,000 to 5,000, and 52 days from 5,000 to 6,000. But it took just 13 days to go from 6,000 to 7,000, another 13 days from 7,000 to 8,000, and it has now spent 23 days oscillating in the 8,000-9,000 range. The single biggest driver of volatility in asset markets is the speed of the rise, and the KOSPI's recent pace has been unusually fast by historical comparison.

The current back-and-forth around 8,000 may in fact be a healthy consolidation process, and the longer it persists, the more it could underpin future market stability.

Single-stock leveraged ETFs tracking Samsung Electronics and SK hynix were identified as another key driver of volatility. To maintain their target returns, these products mechanically rebalance — buying more when the underlying rises and selling when it falls — and because their assets under management (AUM) keep growing, the scale of these rebalancing trades grows too, amplifying volatility. For example, a product with won 1 trillion in AUM that rises 3% in a day must buy an additional won 30 billion worth of spot and futures positions.

Given this structural issue, investors were advised to avoid single-stock leveraged ETFs on Samsung Electronics and SK hynix and instead favor direct investment in individual semiconductor stocks. Interestingly, data from the Korea Capital Market Institute shows retail investors have been buying these leveraged products when prices fall and selling when they rise — a contrarian pattern suggesting the market may be self-correcting its own volatility. A call was also made for securities broadcasters to stop running leveraged ETF advertisements.

The discussion recalled the 1983 Tokyo Declaration, when Samsung chairman Lee Byung-chul announced Korea's entry into semiconductors despite meeting none of the conventional prerequisites for a viable chip industry — a population of over 100 million, per capita income above $10,000, and the ability to absorb 50% of output domestically. The world was skeptical, yet Samsung Electronics developed the 64K DRAM within six months, becoming only the third country after the US and Japan to do so.

Even after DRAM prices collapsed in 1990 and Samsung Electronics posted losses in the trillions of won, the company announced a large-scale investment plan in 1992 rather than retreating — a decision that led to the world's first 64M DRAM in 1992 and the top global semiconductor ranking in 1993. That historical lesson — that no achievement comes without investment — was cited as directly applicable to the newly announced won 800 trillion cluster plan.

The blueprint was likened to nation-defining infrastructure projects such as the Gyeongbu Expressway or the high-speed internet buildout, representing a comparable reshaping of Korea's industrial map. Where the country's industrial axis once ran diagonally from Seoul to Busan, a new northern branch connecting Gwangju and the Honam region is set to add a fork, transforming the map into a Y-shaped industrial and economic structure.

The Honam region already has 23GW of total power generation capacity, 47%, or more than 10GW, of which is solar, and its coastal location gives it an advantage in water supply — factors cited as rational grounds for the regional allocation. The view was strongly emphasized that this should be understood not as a politically motivated regional favor but as a decisive response to Korea's falling potential growth rate and shrinking job opportunities for young people.