US markets closed mixed with S&P -0.07%, Nasdaq -0.51% and Dow +0.32% | Nasdaq -0.51%, S&P -0.07% — Korea Open Preview 26/05/19
Hey, Dongchun here.
The only thing that matters today is the divergence inside the indices — Dow strength, semis weakness, and yields at a 12-month high all in one session. Nvidia earnings on Wednesday after-hours (May 20 ET) is the single binary event that decides the next week of Korean chip flow. Watch SK Hynix and Samsung's first 30 minutes — if foreigners stay net buyers in chips while selling everywhere else, the divergence trade has another leg.
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1. US Session Recap
The S&P 500 closed at 7,403.05, down 0.07%, while the Nasdaq fell 0.51% to 26,090.73 and the Dow rose 0.32% to 49,686.12. Russell 2000 dropped 0.65% to 2,775.10, confirming a clear risk-off rotation from small caps and growth into mega-cap defensives.
The single biggest catalyst was the 10-year Treasury yield touching 4.62% (+0.61%), a one-year high, after back-to-back inflation reports pushed traders to rule out a 2026 Fed cut and a handful of desks to model an outright hike. SOX fell 2.47% as Micron, Nvidia, Broadcom and Intel all dropped into the Nvidia earnings print due May 20 after the close.
Market breadth was poor under the hood. Dow strength masked broad weakness — VIX did fall 3.31% to 17.82, signaling no panic, but the simultaneous outperformance of defensives, gold (+0.72%) and silver (+2.61%) shows funds rotating, not buying.
Direct Korea implication: Samsung Electronics and SK Hynix face a second consecutive SOX-driven gap risk, but the semis-only foreign buying pattern from yesterday could repeat if the rotation persists. Auto names tied to US-listed peers and consumer discretionary should remain heavy.
| Index | Close | Change |
|---|---|---|
| S&P 500 | 7,403.05 | -0.07% |
| Nasdaq | 26,090.73 | -0.51% |
| Dow Jones | 49,686.12 | +0.32% |
| Russell 2000 | 2,775.10 | -0.65% |
2. Korea Market Snapshot
KOSPI was at 7,493.18, down 6.12% — a steep break below the 7,500 line that yesterday's PM scenario had flagged as the bear trigger. KOSDAQ matched the damage at 1,129.82, off 5.14%. This is the worst Korean session of the month, driven primarily by US rate shock spillover and oil price volatility.
Foreign flow concentrated into the semiconductor names, with Samsung Electronics holding +3.88% at 281,000 KRW and SK Hynix +1.15% at 1,840,000 KRW, while autos, internet and 2차전지 all saw heavy outflows. Hyundai Motor extended its profit-taking decline to -5.29%, and Kakao fell 3.52%.
The combined flow pattern points to a structurally bifurcated tape: chips remain a foreign safe-harbor inside Korea, while the rest of the index is being de-risked. Until that bifurcation closes, a broad index rebound is unlikely.
| Index | Prev Close | Change | Key Level |
|---|---|---|---|
| KOSPI | 7,493.18 | -6.12% | 7,400 next support |
| KOSDAQ | 1,129.82 | -5.14% | 1,100 psychological |
| Investor | KOSPI Net | KOSDAQ Net | Trend |
|---|---|---|---|
| Foreigners | Chip-only buy bias | Mixed | Concentrated in Samsung / SK Hynix |
| Institutions | Defensive bid | Net sell | Rotating to dividend names |
| Retail | Dip-buying chips | Net buy | Tracking foreign chip flow |
3. Korea Sector Breakdown
The dominant theme was a rotation out of high-duration tech and small caps into defensives and inflation hedges, driven by the 10Y yield breakout to 4.62%. Gold +0.72% and silver +2.61% confirmed the inflation-hedge bid.
Korean gainers were narrow — Samsung Electronics (005930) +3.88% and SK Hynix (000660) +1.15% stood alone, supported by foreign chip-only buying that ignored broader index weakness. KODEX Semiconductor remains the cleanest proxy.
Korean losers spanned autos, internet and batteries. Hyundai Motor (005380) -5.29% extended its post-rally profit-taking. NAVER (035420) -1.72%, Kakao (035720) -3.52% and LG Energy Solution (373220) -2.16% all weighed on the broader tape.
| Sector | US Session | Korea Stock | Korea Move | Watch |
|---|---|---|---|---|
| Semiconductors | ▼ SOX -2.47% | Samsung (005930), SK Hynix (000660) | +3.88% / +1.15% | KODEX Semiconductor |
| Defensives | ▲ Dow +0.32% | Utilities, dividend names | Mixed | TIGER 200 Dividend |
| Auto | ▼ Mixed | Hyundai (005380) | -5.29% | TIGER 200 |
| Internet | ▼ Weak | NAVER (035420), Kakao (035720) | -1.72% / -3.52% | KODEX Internet |
| 2차전지 | ▼ Weak | LG Energy (373220) | -2.16% | TIGER 2차전지 |
4. Stocks on My Radar
| Ticker | Price | Session % | Key Event |
|---|---|---|---|
| BMNR | $18.73 | -5.74% | ETH accumulation slowdown concern |
| SMCI | $30.85 | -0.61% | Goldman Sell residual, no new catalyst |
| ASTS | $86.83 | +3.78% | Carrier JV + $3.5B cash reaffirmed |
| POET | $14.21 | -11.02% | $400M dilution + class action follow-through |
| RBLX | $46.98 | +9.64% | DAU +35%, bookings +43% YoY |
BMNR fell another 5.74% as the market priced in slower ETH accumulation pace ahead of the 5% supply target. Reported holdings reached 5.28 million ETH and $12.6B total crypto/cash, but the deceleration narrative continues to outweigh the treasury thesis.
SMCI was nearly flat at -0.61%. Goldman's Sell rating still pressures sentiment, but no new catalyst hit, and the Q4 guidance of $11–12.5B revenue from the May 5 earnings remains the supportive floor.
ASTS rallied 3.78% as the AT&T/Verizon/T-Mobile satellite JV thesis held despite the Q1 revenue miss ($14.7M vs $38M consensus). Reaffirmed FY guidance of $150–200M, $3.5B cash, and 45 BlueBird launches planned for 2026 underpin the bounce.
POET collapsed another 11.02% on top of yesterday's -22.36%. The $400M direct offering (19M shares + warrants at $21) is still digesting, alongside multiple class-action lawsuits and the Celestial AI/Marvell order cancellation overhang.
RBLX surged 9.64% on the strongest engagement print of the year — DAU +35% to 132M, bookings +43% YoY to $1.7B, monthly unique payers +52% to 31M. Dip-buyers ignored the early-May 2026 guidance cut.
5. Earnings Watch
Korean earnings calendar is quiet this week with only SK Holdings on May 21 as the major name, but the US semiconductor leader print on May 20 dominates the global tape.
| Company | Report Date | EPS Est (KRW) | Revenue Est |
|---|---|---|---|
| SK Holdings | 2026-05-21 | 13,112 | 30.25 trillion KRW |
The biggest event for Korean chip exposure is Nvidia's Q1 FY27 report on Wednesday May 20 after the US close.
| Company | Time (ET) | Consensus EPS | Watch For |
|---|---|---|---|
| Nvidia | May 20, 4:20 PM | $1.77 | Revenue ~$78B, Data Center ~$73B, Blackwell margin and shipment cadence |
Korea read-through: a Nvidia beat with strong data-center guidance directly supports SK Hynix's HBM franchise and indirectly Samsung's HBM3E ramp. A miss or soft guide triggers a sharp gap-down across the entire Korean chip complex and likely a broader KOSPI retest of 7,400. Options markets are pricing an ±8–10% Nvidia move.
6. Today's Trade Setup
Korea opens after a brutal -6.12% session, so the read-through is two-sided. US futures are mixed — S&P +0.02%, Dow +0.35%, Nasdaq -0.29% — and that combination favors a technical rebound attempt rather than a continuation lower, but with a hard cap around 7,550 until Nvidia prints.
The single most important indicator is foreign net flow in Samsung Electronics (005930) in the first 30 minutes. Samsung was the only mega-cap that held +3.88% yesterday on foreign buying; if that flow continues, KOSPI can stabilize even as autos and internet stay heavy. If foreigners flip Samsung to net sell, the 7,400 level comes into play fast.
Sectors to focus on: semiconductors (Samsung 005930, SK Hynix 000660) as the divergence trade, and dividend/defensive names tracking the US Dow leadership. Avoid catching falling knives in autos (Hyundai 005380) and internet (Kakao 035720) until the rate shock fades.
| Scenario | Trigger Condition | KOSPI Target |
|---|---|---|
| Bull | Foreign net buy in Samsung > +100B KRW, Nasdaq futures stabilize | 7,600 retest |
| Neutral | US futures sideways ±0.5%, chips flat | 7,450–7,550 range |
| Bear | Nasdaq futures break -0.7%, foreign chip selling | Test 7,400 support |
Base case: a shallow technical rebound to the 7,500–7,550 zone with very narrow leadership from chips, then sideways into Nvidia earnings on May 20 after the US close. For readers outside KRX, EWY (iShares MSCI South Korea ETF) and Samsung GDR (005935.LSE) provide proxy exposure.
This was a calm tape with violent internals, and that combination almost never resolves quietly. Position into Nvidia, not around it.
So — which way does Korea swing at the open today?
That's the AM breakdown for May 19. Trade safe.
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