KOSPI Forecast May 29, 2026: US stocks closed at fresh records on May 28 with S&P (Nasdaq +0.91%, S&P +0.58%)
Hey, Dongchun here.
KOSPI and KOSDAQ open on May 29, 2026 after US markets closed with Nasdaq +0.91% and S&P 500 +0.58%. Here is the Korean stock market preview for foreign investors.
The only thing that matters today is that the market printed all-time highs on the same day PCE accelerated to a near 3-year high — proof that AI revenue recognition is now the dominant pricing input over the inflation path. Snowflake's +36.5% guidance-driven move and SMCI's +8.14% Taiwan compliance rally show the AI infrastructure story is widening from chips into both software and supply-chain trust signals. Watch whether Korean memory leaders Samsung and SK Hynix capture this AI-software bid from the open, or whether KOSDAQ's -3.36% bleed signals that the rotation is large-cap only.
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1. US Market Close: Impact on Korean Stocks
The S&P 500 closed at 7,563.63 (+0.58%) and the Nasdaq Composite at 26,917.47 (+0.91%), both setting fresh all-time records, while the Dow Jones Industrial Average added 0.05% to 50,668.97 and the Russell 2000 climbed 0.57% to 2,936.57. The new highs extended an 8-week winning streak for the S&P 500 and reaffirmed tech leadership rather than broad rotation.
The single biggest catalyst was Snowflake's earnings-day move of roughly +36.5%, its best day ever, after the company posted a strong AI-driven outlook that re-energized the broader AI infrastructure trade. The session also absorbed a hot 3.8% headline PCE inflation print (a near 3-year high) and a reported but later disputed US-Iran ceasefire extension headline, neither of which derailed the rally.
Breadth was tech-led but not exclusively narrow — SOX rose +1.00% to 12,829.14, Russell 2000 participated with +0.57%, and VIX fell -3.38% to 15.74, the lowest comfort zone of the recent stretch. The advance/decline mix favored technology and AI-adjacent software over energy, where WTI slipped -0.27% to $88.44 and Brent fell -2.06%.
The direct Korea implication is constructive for memory and AI-infrastructure names: SOX strength typically transmits to Samsung Electronics (005930) and SK Hynix (000660), while the SMCI +8.14% supply-chain compliance narrative supports Korean server back-end equipment suppliers. KOSDAQ small-cap momentum names face risk if the rotation stays large-cap concentrated.
| Index | Close | Change |
|---|---|---|
| S&P 500 | 7,563.63 | +0.58% |
| Nasdaq | 26,917.47 | +0.91% |
| Dow Jones | 50,668.97 | +0.05% |
| Russell 2000 | 2,936.57 | +0.57% |
2. KOSPI and KOSDAQ Today: Korean Market Opening Outlook
KOSPI closed at 8,228.70 (+2.25%, +181.19 points) while KOSDAQ moved sharply the other way at 1,133.13 (-3.36%, -39.39 points). The KOSPI move triggered the prior PM bull-case scenario as US futures strength and a calmer VIX flowed straight into large-cap Korean equity demand.
Foreign net flow concentrated into large caps, with Samsung Electronics (005930) still weighing at 299,500 KRW (-2.44%) but SK Hynix (000660) holding +2.07% to 2,289,000 KRW and LG Energy Solution (373220) extending +15.25% to 442,000 KRW on the DTE Energy ESS contract narrative. The mix suggests foreign money picked specific stories — HBM and battery infrastructure — rather than blanket large-cap buying.
Institutional and retail flows likely combined as supportive in KOSPI but unable to defend KOSDAQ, where mid-cap momentum (battery materials, robotics, biotech) saw a coordinated profit-taking wave. The pattern implies tomorrow's session opens with a continued large-cap bias and ongoing KOSDAQ vulnerability unless the AI-software bid spreads to smaller names.
| Index | Prev Close | Change | Key Level |
|---|---|---|---|
| KOSPI | 8,228.70 | +2.25% | 8,300 next resistance |
| KOSDAQ | 1,133.13 | -3.36% | 1,100 support test |
| Investor | KOSPI Net | KOSDAQ Net | Trend |
|---|---|---|---|
| Foreigners | Large-cap concentrated bid | Net negative tilt | First constructive session after long sell streak |
| Institutions | Net supportive | Net neutral to negative | Partial absorber on KOSPI |
| Retail | Mixed | Aggressive dip exposure | Continues defensive role |
3. Korean Sector Breakdown: What is Moving Today
The dominant theme was AI infrastructure re-acceleration, with Snowflake's record earnings-day move spilling into chip and server-supply names globally. The same trade carried directly to Korean memory leaders and battery infrastructure plays, even as small-cap momentum unwound.
Top gainers in Korea were battery and HBM-linked semis. LG Energy Solution (373220) extended +15.25% on the DTE Energy 2.4 trillion KRW ESS contract feeding Oracle's Michigan AI data center grid, while SK Hynix (000660) +2.07% kept the HBM bid intact. NAVER (035420) +3.12% benefited from the US 10Y yield drop to 4.45%, supporting growth-duration appetite.
Top laggers were Samsung Electronics (005930) -2.44%, where foreign sell pressure remained concentrated, and Kakao (035720) -0.99%, which failed to ride the platform tailwind. KOSDAQ as a whole lost -3.36% as small-cap battery materials, robotics, and biotech names saw broad profit-taking.
| Sector | US Session | Korea Stock | Korea Move | Watch |
|---|---|---|---|---|
| Semis (HBM) | ▲ SOX +1.00% | SK Hynix (000660) | +2.07% | KODEX Semiconductor |
| Battery | ▲ ESS narrative | LG Energy (373220) | +15.25% | TIGER 2차전지 |
| Platform | ▲ Yield drop | NAVER (035420) | +3.12% | Growth duration bid |
| Semis (Memory) | ▲ but split | Samsung (005930) | -2.44% | Foreign concentration |
| Auto | ◐ Flat | Hyundai (005380) | -0.22% | Cyclical disconnect |
| KOSDAQ momentum | ▼ Heavy | Small caps | -3.36% (index) | Momentum unwind |
4. Korean Stocks on My Radar
| Ticker | Price | Session % | Key Event |
|---|---|---|---|
| BMNR | $19.25 | +2.28% | ETH treasury 5.39M tokens, $12.3B holdings reaffirmed |
| SMCI | $41.30 | +8.14% | Taiwan authorities collab thwarts illegal server diversion |
| ASTS | $133.09 | +2.69% | 10-day winning streak +78%, $3.5B cash, BlueBird 8/9/10 launch mid-June |
| POET | $13.26 | -0.15% | Stabilizing post $400M raise, Lumilens $50M order intact |
| RBLX | $46.83 | +2.63% | Citi $70 target, Allstate +119% stake disclosed |
SMCI jumped +8.14% after disclosing that collaboration with Taiwanese authorities blocked an authorized reseller's attempt to illegally divert servers to China, with volume hitting 67.4 million shares (74% above three-month average), restoring some compliance trust after the March smuggling scandal involving a co-founder.
ASTS continued its breakout to a 10-day cumulative +78%, expanding market cap by about $16 billion to $38 billion; next near-term catalyst is the mid-June Falcon 9 launch of BlueBird 8, 9, and 10, with year-end 2026 target of approximately 45 satellites and reaffirmed $150–200 million 2026 revenue guidance.
RBLX advanced +2.63% as Citi analyst Jason Bazinet reiterated his Buy rating with a $70 price target, and Allstate Corp disclosed a 119% increase in its Q4 stake; the company's 111+ million daily active user base continues to support double-digit revenue growth.
BMNR rose +2.28% as the ETH treasury (5.39 million tokens, 4.47% of total ETH supply) and $12.3 billion crypto-and-cash holdings narrative held, with 4.71 million ETH staked generating annualized $276 million yield.
POET drifted -0.15% as the $400 million registered direct offering dilution is digested; the Lumilens joint development deal with an initial $50 million purchase order remains intact, while PFIC litigation overhang and the Marvell/Celestial AI lost-order issue persist.
5. How to Trade KOSPI Today: Setup and Levels
Expected KOSPI open is gap-up with US futures extending overnight strength — Nasdaq futures +0.92%, S&P futures +0.66%, Dow futures +0.07%. The primary driver is the spillover of the Snowflake-led AI rally into Korean memory and AI-infrastructure names.
The single most important indicator to watch is foreign net flow in Samsung Electronics (005930) during the 9:00–9:05 AM KST open window. After Samsung's -2.44% close yesterday, a sustained foreign bid in the first five minutes would confirm that the long foreign sell streak is finally breaking; absence of that bid signals that the rally is HBM-concentrated only and Samsung remains an isolation case.
Top 2 sectors to focus on are semiconductors (SK Hynix 000660 leading, with Samsung Electronics 005930 as the swing indicator) and battery (LG Energy Solution 373220 follow-through plus diffusion to Samsung SDI 006400 and POSCO Future M 003670). KOSDAQ small-cap names remain at risk of further momentum unwind after -3.36%.
| Scenario | Trigger Condition | KOSPI Target |
|---|---|---|
| Bull | Foreign net buy in Samsung > +200B KRW + Nasdaq futures hold > +0.5% + VIX < 16 | Tests 8,300 |
| Neutral | Foreign net flow flat + futures hold but no extension + USD/KRW 1,500–1,505 box | 8,200–8,250 box |
| Bear | KOSDAQ extends > -2% + foreign outflow accelerates > 800B KRW + futures fade below 0% | 8,150 support test |
Base case is a gap-up open with continued large-cap leadership, where SK Hynix and LG Energy Solution carry the index while Samsung Electronics and KOSDAQ test whether the rally broadens. International readers without KRX access can track exposure via EWY (iShares MSCI South Korea ETF) for broad index beta or Samsung Electronics GDR for direct mega-cap memory exposure.
An all-time high on a 3.8% PCE day is not contradiction — it is the market choosing AI cash flow over inflation theory. Tomorrow's session decides whether Korean semis ride that choice or get left behind by KOSDAQ's momentum unwind.
So — which way does Korea swing at the open today?
That's the AM breakdown for May 29, 2026. Trade safe.
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