코스닥 5% 급등, 45조 정책 자금이 '사이드카' 발동시켰다
On May 22, KOSPI closed at 7,847.71, up 32.12 points (+0.41%), holding steady above the 7,800 level. KOSDAQ soared 4.99% to 1,161.13, buoyed by expectations of policy fund inflows from the 150 trillion won National Growth Fund—strong enough to trigger a buy-side circuit breaker. Overnight, Wall Street's Dow Jones hit record closing levels and bond yields stabilized, sustaining risk-on sentiment ahead of Memorial Day. On May 23 (Monday), the key focus points are whether KOSDAQ's policy tailwinds persist and the strength of foreign investor return flows.
Today's Market Snapshot

- KOSPI: 7,847.71 (+32.12pt, +0.41%)
- KOSDAQ: 1,161.13 (+4.99%) — buy-side circuit breaker activated
- Supply/demand: Foreign investors on the sidelines; retail investors leading net purchases / institutional investors concentrated buying on KOSDAQ (detailed figures pending official disclosure)
- FX/government bonds: Bond yield stabilization trend under review (specific levels not yet disclosed)
- Trading volume: Massive volume confirmed at circuit-breaker-triggering levels on KOSDAQ
Global Backdrop — Overnight U.S. Markets

- Equity indices: Dow Jones hits all-time closing high; S&P 500 posts 8 consecutive weeks of gains. Bond yield relief acts as the primary catalyst, with risk-on appetite sustained ahead of Memorial Day (5/26) recess.
- 10-year Treasury yield: Easing bond yields emerge as the key driver of improved investor sentiment—a stark contrast to the prior week when surging yields pressured S&P and Nasdaq for three consecutive trading days.
- Key headlines: U.S.-Iran nuclear negotiation progress reports triggered oil price declines, while NVIDIA earnings expectations buoy Nasdaq. The prior week's trend of Dow +650pt, oil collapse, and bond yield retreat carries through to the 22nd.
Dominant Sectors & Themes (3+ sectors)
Top Priority: KOSDAQ Growth Stocks / Policy-Beneficiary Theme

- Movement: KOSDAQ index +4.99% (1,161.13)—buy-side circuit breaker triggered. Explosive buying connected to expectations that roughly 45 trillion won of the 150 trillion won National Growth Fund will concentrate in KOSDAQ and mid-cap growth stocks.
- Leading names: KOSDAQ biotech, secondary battery, and IT component stocks broadly rally (detailed individual stock performance pending verification)
- Watch points: Timing and details of policy fund deployment announcements. Post-circuit-breaker merchandise absorption becomes the short-term trend determinant. Since retail investors are driving inflows, confirmation of institutional and foreign co-participation is critical.
Second Priority: Semiconductors (Samsung Electronics, SK Hynix)

- Movement: KOSPI +0.41%—modest gains. Following May 21's explosive +8.42% rally (7,815.59), consolidation patterns emerge amid profit-taking.
- Leading names: Samsung Electronics (005930), SK Hynix (000660)—drove the May 21 rally but showed dampened upside on the 22nd.
- Watch points: Nomura sets Samsung Electronics target at 590,000 won, SK Hynix at 4 million won. SK Securities raises targets to 500,000 won and 3 million won respectively. SK Hynix's HBM average selling price (ASP) per gigabyte projected to rise from ~$12.90 in 2026 to $20.90 in 2027—the key catalyst.
Third Priority: U.S. AI / Big Tech Linkage Theme
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- Movement: U.S. S&P 500 posts 8 consecutive weekly gains. NVIDIA earnings expectations and AI investment momentum provide indirect benefits to domestic AI server and power infrastructure plays.
- Leading names: Domestic AI infrastructure and data center-related KOSDAQ component suppliers estimated to benefit.
- Watch points: Sustaining the "AI investment is survival" narrative championed by sell-side analysts. NVIDIA earnings results will shape directional flow for domestic HBM and AI server stocks.
Watchlist Stock Response Guide (3+ stocks)
This guide provides reference price levels based on brokerage reports and public disclosure data and is for reference only. All investment decisions are your responsibility.
Samsung Electronics (005930)
- Today's close / change: Consolidation trend on May 22 following May 21 rally (precise May 22 closing figure pending official disclosure)
- Supply/demand: Foreign investors cautious; institutional profit-taking likely / retail investors entering at lower prices
- Fundamental triggers: Labor agreement settlement (May 21 rally catalyst); HBM and AI semiconductor supercycle demand expected to persist. Nomura report confirms "memory supercycle not over."
- Brokerage targets / support/resistance levels: Nomura 590,000 won, SK Securities 500,000 won, some houses 430,000 won downside (range: 430,000–590,000 won). Recent 52-week box peak set during KOSPI 8,000 level breakout.
- Risk factors: ① Foreign investor mass selloff resumption possible (precedent: 13.2 trillion won outflow over May 15–19 week) ② U.S.-Iran negotiation breakdown → oil rebound → inflation → interest rate re-rise pathway
- Response scenarios: Favorable flow—observe whether 500,000 won level holds; foreign investor net-buy reversal offers additional momentum / Unfavorable flow—monitor 430,000 won support breach and potential renewed massive foreign selling as alarm levels.
SK Hynix (000660)
- Today's close / change: May 22 consolidation following May 21 KOSPI rally co-participation (precise May 22 close pending official disclosure)
- Supply/demand: Foreign investor selloff pressure easing; institutional net-buy bias estimated.
- Fundamental triggers: HBM ASP projection—2026 $12.90 → 2027 $20.90 (Nomura report). Structural HBM demand expansion driven by sustained AI infrastructure investment.
- Brokerage targets / support/resistance levels: Nomura 4 million won, SK Securities 3 million won, some houses 2.75–3.1 million won (range: 2.75–4 million won). Recent peak formation at 52-week highs; watch upper box breakout.
- Risk factors: ① Chinese memory supply glut concern re-emergence ② U.S. semiconductor export restrictions to China tighten, disrupting value chain.
- Response scenarios: Favorable flow—3 million won level maintenance and foreign investor net-buy return signal extended momentum / Unfavorable flow—monitor 2.75 million won support breach as alarm level; breach risks sharper short-term correction.
KOSDAQ Policy-Beneficiary Representative Stock—Ecopro BEM and Secondary Battery / Biotech Sectors
- Today's close / change: Sector-wide strength amid KOSDAQ +4.99% surge (individual stock figures pending official disclosure)
- Supply/demand: Retail massive net purchases; institutional co-participation / buy-side circuit breaker triggered
- Fundamental triggers: Expectations that 45 trillion won of the 150 trillion won National Growth Fund concentrates in KOSDAQ's long-neglected growth names (biotech, secondary batteries, IT components). KOSDAQ's extended underperformance versus KOSPI underscores valuation re-rating momentum.
- Brokerage targets / support/resistance levels: Recent 52-week KOSDAQ box peak at 1,161pt (May 22 close)—watch for new-high confirmation amid circuit breaker levels. Prior 1,100pt resistance—verify if conversion to support occurred.
- Risk factors: ① Policy fund execution timeline undefined → sentiment exhaustion risk if specifics delayed ② Sharp KOSDAQ rally sparks concentrated profit-taking selloff.
- Response scenarios: Favorable flow—1,100pt support maintained and policy details announced drive further momentum / Unfavorable flow—1,100pt breach watched as alarm level; policy announcement delays invite short-term correction caution.
Tomorrow's Must-Watch Events
- May 26 (Monday) KST: U.S. Memorial Day market closure—liquidity drop could expand Korean market volatility / profit-taking and position unwinding likely.
- After May 23 (Friday): National Growth Fund (150 trillion won) KOSDAQ investment details and execution timeline announcement—core variable for KOSDAQ rally persistence.
- Unscheduled (this week): Korea CPI (MoM/YoY) release expected—rate-cut hopes and inflation drift collision confirmed.
- May 23 (Friday) KST post-market: U.S.-Iran nuclear negotiation progress updates—breakdown risks oil rebound → global bond yield re-rise → Korean exporter headwinds.
One-Line Strategy Memo
May 22's KOSDAQ +4.99% surge and circuit breaker trigger stem from powerful policy expectations, and both rally persistence and expectation exhaustion risk coexist until concrete execution timelines are confirmed. Anchoring KOSPI's 7,800 level and KOSDAQ's 1,100 level as near-term support benchmarks enables a binary response: support maintenance sustains risk-on; breach triggers risk-off. Ahead of Memorial Day (5/26), monitor foreign investor supply/demand gaps caused by reduced U.S. trading volume, while maintaining the twin-engine strategy of semiconductor HBM supercycle and KOSDAQ policy beneficiaries as your core positioning going forward.
Glossary & Reference
- Supply/demand: Foreign, institutional, and retail net buy/sell flows
- Box range: Recent 52-week or quarterly high/low price boundaries
- Support/resistance: Actual levels observed across brokerage reports and technical charts (no arbitrary figures)
- Circuit breaker: Program trade halt triggered on extreme price moves (KOSDAQ +6% for 1+ minute triggers 5-minute halt)
This brief synthesizes publicly available news, regulatory filings, and brokerage research. It is not investment advice or a guarantee of returns. All trading decisions and outcomes remain solely your responsibility.
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