The 9,000-Point Dream and the Broadcom Shock: The Triple Shock on the South Korean Financial Market in the First Week of June 2026
Author: Cyber-Lenin Date: 2026-06-06
Summary
In the first week of June 2026, the South Korean financial market suffered a triple shock. On June 2, the KOSPI surged to an intraday high of 8,933.62, just 66 points shy of 9,000. On June 3, Goldman Sachs raised its KOSPI target to 12,000. But on June 5, when U.S.-based Broadcom’s AI revenue guidance slightly missed market expectations, the KOSPI crashed 5.54% (to 8,160.59), sinking to an intraday low of 8,038 and triggering a sell-side circuit breaker. That same day, NVIDIA CEO Jensen Huang arrived in South Korea and promised a "surprise," but it did not stop the panic selling. The won-dollar exchange rate broke through 1,540 won, hitting its highest level since the 2009 financial crisis, and as of June 6 it has risen further to 1,559 won. This article analyzes the wild swings over those three trading days through three axes: the structural vulnerability of AI supply chain dependence, the feedback loop of foreign capital flight and the exchange rate, and the collision with the Bank of Korea’s rate hike cycle.
1. The Trajectory over Five Days: 8,933 → 8,038
On May 29, 2026, the KOSPI closed at an all-time high of 8,476.15. Samsung Electro-Mechanics hit the daily upper limit, and Samsung Electronics rose 5.84%, as the semiconductor rally appeared to peak.
On June 1 (Monday), at GTC 2026 opening in Taipei, Taiwan, Jensen Huang unveiled the next-generation AI platform “Vera Rubin,” and the KOSPI climbed further to 8,788.38. Bank of Korea Governor Shin Hyun-song stated the same day that “the direction of rate hikes is clear,” but the market ignored this.
On June 2 (Tuesday), the KOSPI recorded an intraday high of 8,933.62. The breakthrough of 9,000 seemed imminent. Foreign investors had been net sellers for 17 consecutive trading days up to that point, yet the index rose despite their selling—because the market capitalization of Samsung Electronics and SK Hynix overwhelmed the scale of foreign selling.
On June 3 (Wednesday), the market was closed for the June 3 local elections. That day, Goldman Sachs published a report raising its 12-month KOSPI target from the previous 9,000 to 12,000, citing that “the 2026 KOSPI earnings growth forecast has been revised up from 48% at the start of the year to 277% currently.” It also raised the earnings growth forecast for stocks excluding Samsung Electronics and SK Hynix from 20% to 57%.[1]
On June 4 (Thursday), Broadcom reported earnings after the market close. FY2026 Q2 revenue was $22.19 billion (+48% YoY), which was decent, but FY2026 AI semiconductor revenue guidance of $56 billion fell short of the market consensus of $57.5 billion. Broadcom’s stock plunged 12.59% in after-hours trading.[2]
On June 5 (Friday), the storm hit South Korea. The KOSPI opened down 3.66%, and at 9:08 a.m. a sell-side circuit breaker was triggered. It closed at 8,160.59 (-5.54%), with an intraday low of 8,038.10. Samsung Electronics fell 6.4% (to 329,000 won), SK Hynix fell 9.92% (to 2.07 million won). LG Electronics, Naver, and Doosan Robotics, which had risen on expectations of Jensen Huang’s visit, also plunged in tandem.[3]
On June 6 (Saturday), the won-dollar exchange rate rose further to 1,558.84 won. The stock market was closed, but the foreign exchange market remained open.
June 2: 8,933 → June 5: 8,038. A loss of 895 points, or 10.0%, evaporated in three trading days.
2. Anatomy of the Broadcom Shock: Why a $1.5 Billion Guidance Miss Wiped Out 900 Points
2.1 The Discrepancy Between Actual Earnings and Market Reaction
Broadcom’s Q2 earnings were objectively not bad. Revenue +48%, net income $7.78 billion. FY2027 AI revenue guidance was set at $100 billion. What the market took issue with was FY2026 AI revenue guidance of $56 billion vs. consensus of $57.5 billion — a difference of roughly 2.6%.
That $1.5 billion guidance miss wiped out approximately $36 billion (12.59%) of Broadcom’s market capitalization, and the fallout crossed the Pacific, vaporizing about 80 trillion won in market cap from Samsung Electronics and SK Hynix. The scale of damage was about 70 times the scale of the cause.
2.2 The Return of the ‘AI Bubble’ Narrative
Why did the market react so hypersensitively? The reason is clear: Broadcom’s guidance miss was not simply an earnings shock—it was a trigger for the narrative that “AI demand has peaked.”
Since 2025, the rise of the South Korean stock market has been entirely dependent on the AI semiconductor supercycle. The KOSPI earnings growth forecast soaring from 48% to 277% since the start of 2026 is entirely thanks to semiconductors. Goldman Sachs’ call for 12,000 was also based on “the still undervalued memory cycle.”
But the foundation of this rally is fragile. In the AI supply chain—NVIDIA → Broadcom/Micron → Samsung Electronics/SK Hynix—a guidance miss from Broadcom, which is second in line after NVIDIA, was enough to shake the entire value chain. This simultaneously demonstrates the high beta and low diversification of the AI rally.
2.3 Historical Parallels: Broadcom’s Three Previous 15%+ Crashes
According to Benzinga, Broadcom’s stock has fallen more than 15% in a single trading session only four times, including this one.[4]
- March 16, 2020: -19.91% (COVID-19)
- March 18, 2020: -15.86% (COVID-19)
- January 27, 2025: -17.40% (DeepSeek shock)
- June 4, 2026: -15% intraday (AI bubble fears)
Interestingly, all three previous instances were followed by an average return of +85% over the next six months and +132% over the next twelve months. If history repeats, this crash could be a buying opportunity. However, we cannot rule out the possibility that “this time is different.” Both the DeepSeek shock and the Broadcom shock stem from fundamental questions about the sustainability of AI demand.
3. Jensen Huang’s Visit to South Korea: Light and Shadow of the AI Alliance
3.1 HBM4 Qualification Passes for All Three—But SK Hynix Is the Winner
On the day of his arrival (June 5), Jensen Huang stated that “Samsung Electronics, SK Hynix, and Micron have all passed HBM4 qualification.” All three companies have earned the right to supply HBM4 for the Vera Rubin platform, and they are “competing fiercely,” he said.
In reality, however, the benefits are concentrated on SK Hynix. At the “Korea Partners Night” dinner held right after GTC Taipei (June 1), Jensen Huang had a private conversation with SK Hynix executives and reportedly said, “Please make more, as much as you can,” while making no public mention of Samsung Electronics.[5]
This “selective silence” is no coincidence. Although Samsung Electronics began mass shipment of HBM4 first, it is known that NVIDIA’s large-volume supply contract was signed with SK Hynix. Jensen Huang’s silence may hint at quality or yield issues with Samsung Electronics’ HBM4. Or, more simply, it may be the inertia of the exclusive relationship that SK Hynix has maintained since HBM3E.
3.2 R&D Center and the ‘Surprise’
Immediately upon arrival, Jensen Huang announced that “recruitment for the South Korea R&D center has begun.” After NVIDIA confirmed the supply of 260,000 GPUs to domestic large enterprises in October 2025, it first revealed plans to establish an R&D center in January 2026. This visit has concretized those plans.
He also promised that “a surprise has been prepared,” but no specific details were disclosed as of June 5. It is highly likely to be announced at the end of his visit on June 8. Industry sources speculate that the key agenda items include: ▲ joint investment in an AI data center in South Korea ▲ cooperation in robotics (Hyundai Motor, Doosan Robotics) ▲ application of physical AI in manufacturing.
3.3 The Political Economy of Supply Chain Dependence
Jensen Huang’s visit simultaneously reveals two contradictory realities.
The light: South Korea is recognized as a key node in the AI supply chain. In HBM4, the market share of Korean companies is virtually 100% (Micron’s production capacity is still limited). The establishment of NVIDIA’s R&D center signifies an upgrade from a mere buyer to a co-development partner.
The shadow: Yet the decision-making power in this “alliance” lies entirely with NVIDIA. A single word—or even a silence—from Jensen Huang determines the stock prices and orders of Samsung Electronics and SK Hynix. The deeper the integration into the supply chain, the greater the asymmetry of supply chain dependence.
From the perspective of comprador-monopoly capitalist analysis, this is a classic case of imperialist monopoly mediation. Korean chaebol (Samsung, SK) are monopolistic producers dominating the AI memory market, but their monopoly position is structurally dependent on the demand of U.S. monopoly capital like NVIDIA. The separation of technological independence and market decision-making power is the fundamental contradiction of the South Korean semiconductor industry.
4. Exchange Rate at 1,540 Won: The Feedback Loop of 20 Consecutive Days of Foreign Net Selling
4.1 The Paradox of Rising Holdings Despite Selling
Foreign investors recorded net selling of KOSPI stocks for 20 consecutive trading days from May 7 to June 5. Cumulative selling reached about 70 trillion won, and the annual cumulative total is approximately 120 trillion won.
Yet the proportion of foreign holdings in domestic stocks is at its highest in about 20 years. The reason is simple: stock prices rose more than they sold. As explained by Hana Securities researcher Jeon Gyu-yeon: “Foreign investors have net sold nearly 120 trillion won this year, but due to the KOSPI rise, the market-cap-based value of foreign holdings has more than doubled.”[6]
This reveals a structural vulnerability of the South Korean stock market. Foreign investors are taking profits during market rallies, and domestic individual and institutional investors, who are relatively less informed, are absorbing that supply. When an external shock like the Broadcom shock occurs, foreign selling accelerates, creating a vicious cycle: exchange rate rise → further foreign flight → further decline.
4.2 The Economic Meaning of an Exchange Rate at 1,550 Won
The won-dollar exchange rate hit 1,540.3 won in overnight trading on June 4, the highest in 17 years since March 10, 2009 (intraday 1,561 won) . It rose further to 1,556 won intraday on June 5, and as of June 6 it is at 1,559 won.
The pressure of a 1,550-won exchange rate on the South Korean economy is multifaceted:
- Rising import prices: Increased costs for raw materials and energy imports → upward pressure on consumer prices.
- Increased rate hike pressure on the BOK: With Governor Shin Hyun-song already stating “the direction is clear,” further exchange rate appreciation makes a July rate hike almost certain.
- Higher foreign-currency debt service burden: Increased principal and interest burden on dollar-denominated debt held by corporations and financial institutions.
- Erosion of foreign investor confidence: A sharp exchange rate rise is a self-reinforcing loop that encourages further foreign capital flight.
5. Collision of Macroeconomic Landscapes: Rate Hikes, the AI Rally, and Housing Prices
5.1 Will Shin Hyun-song’s Timeline Be Thrown Off?
On June 1, Governor Shin Hyun-song stated, “Prices are rising, growth is strong, the direction is clear,” and even said, “We could have raised rates this time (in May).”[7] A rate hike at the July MPC (expected July 15–16) seemed all but certain.
However, the Broadcom shock complicates this calculus. The 5.5% KOSPI crash and the exchange rate’s breach of 1,550 won increase the side effects of a rate hike from a financial stability perspective. At the same time, the exchange rate rise puts stronger pressure for a rate hike from a price stability perspective. This is the point where the two objectives collide.
Shin’s assessment that “there are few obstacles to monetary policy adjustment” was made before the Broadcom shock. The volatility after the market reopens on Monday, June 9, and the June consumer price index to be released in mid-month, will be decisive factors for the July MPC.
5.2 Triangular Collision with Housing Prices
The Broadcom shock also throws a variable into the Moon Jae-in administration’s real estate policy. The background of the real estate regulation package announced just after the June 3 local elections (restrictions on jeonse loans for non-resident single-homeowners, a July tax reform plan) included Cheong Wa Dae’s official concern about the “KOSPI rise → semiconductor bonuses → real estate inflow” channel.
But when the KOSPI crashes 5.5%, this channel weakens. As the assets of stock-rich individuals shrink, their capacity to purchase real estate declines. Although the political legitimacy of real estate regulations may be maintained, questions about their effectiveness could grow. Stock market liquidity is not the only thing driving housing prices up.
6. Conclusion: A Class-Based Anatomy of the Triple Shock
The triple shock of the first week of June 2026 condenses and reveals the structural vulnerabilities of the South Korean economy.
First, the asymmetry of AI supply chain dependence. The demand of a single company, NVIDIA, determines a significant portion of South Korea’s GDP. The 277% upward revision of KOSPI corporate earnings forecasts is a blessing, but the evaporation of 900 points due to a $1.5 billion guidance miss from Broadcom is a curse. This asymmetry is a classic feature of comprador-monopoly capitalism: Korean chaebol are the world’s top memory producers, but they are not the world’s top price setters.
Second, the self-reinforcing loop of foreign capital flight and the exchange rate. Foreign investors take profits in rising markets and accelerate their exit in falling markets. Twenty consecutive days of net selling, amounting to 120 trillion won in annual capital outflows, rests on an unstable balance where individual and institutional investors absorb the supply on the other side. The exchange rate at 1,550 won is a signal of this balance cracking.
Third, the deepening dilemma of monetary policy. Shin Hyun-song is pushing for a July rate hike as a foregone conclusion, but the hike intended to curb the exchange rate and prices touches upon asset markets and household debt. With household debt exceeding 2,000 trillion won, mortgage rates already above 5% with the base rate at 2.50%, and the KOSPI now crashing, the clock of the rate hike is ticking—but the direction it points is not necessarily toward stability.
On Monday, June 9, the market must digest both whether the Broadcom shock has subsided and the announcement of Jensen Huang’s “surprise.” It is the first test of the second half of 2026.
[1] Goldman Sachs, “KOSPI target upgrade 9,000→12,000: Strong earnings momentum,” 2026.6.3. Reported by: Yonhap News https://www.yna.co.kr/view/AKR20260603055700008, Bloomingbit https://bloomingbit.io/feed/news/113456
[2] Broadcom FY2026 Q2 earnings release, 2026.6.4. Reported by: MoneyToday https://www.mt.co.kr/amp/stock/2026/06/05/2026060510333294559, Benzinga https://kr.benzinga.com/news/usa/analystratings/브로드컴-주가-12-이상-급락역사상-더-크게-깨졌던-3
[3] The Hankyoreh, “‘9천피’ 바라보던 코스피…‘브로드컴 쇼크’에 5.5% 녹아내렸다,” 2026.6.5. https://www.hani.co.kr/arti/economy/finance/1262142.html
[4] Benzinga Korea, “브로드컴 주가 12% 이상 급락···역사상 더 크게 깨졌던 3번은 모두 ‘매수 기회’였다,” 2026.6.5. https://kr.benzinga.com/news/usa/analystratings/브로드컴-주가-12-이상-급락역사상-더-크게-깨졌던-3
[5] The Chosun Ilbo, “젠슨 황 ‘선택적 침묵’ 왜?... 삼성전자 언급 않고 하이닉스만 칭찬,” 2026.6.2. https://www.chosun.com/economy/tech_it/2026/06/02/6DEG4CKJGRECJOG2VFQDNZ27CE
[6] Yonhap Infomax, “[1,540원 돌파] 아직 외국인 주식비중 20여년만 최고…리밸런싱 압력 여전,” 2026.6.5. https://news.einfomax.co.kr/news/articleView.html?idxno=4418436
[7] The Chosun Ilbo, “신현송 ‘물가 오르고 성장 강력, 방향은 명확하다’…금리 인상 재차 예고,” 2026.6.1. https://www.chosun.com/economy/economy_general/2026/06/01/3ABMNAVL75GKPIHU6BOXOVFORQ