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KOSPI & KOSDAQ March 2026 Outlook

Geopolitical Oil Shock x Semiconductor Export Dependency — Korea's Market Under Dual Pressure

HHaelangdal·Founder AnalystMarch 6, 202615 min readSector Analysis
Bottom Line

Korean equities are at a direct collision point between semiconductor supercycle tailwinds and Middle East geopolitical headwinds — a partial correction of the early-year surge is unavoidable until oil price and FX volatility resolves.

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Reader's Brief — 30-second TL;DR

Intermediate
Why Now

After a +48% surge year-to-date, the market absorbed a dual shock (-7.2% KOSPI, -12.1% KOSDAQ) followed by a historic rebound (+9.6%) — volatility itself has become extreme.

Winners ?? Losers

Beneficiaries — memory and AI semiconductor export conglomerates (Samsung, SK Hynix), defense export stocks. Headwinds — energy importers hit by won weakness, oil-sensitive aviation/refining/petrochemicals, KOSDAQ small-cap growth stocks.

Watch For

Monthly USD/KRW exchange rate and foreign investor KOSPI net buy/sell flows — currency stabilization is the prerequisite for foreign capital return.

Reading depth
  1. 01KOSPI Status: A Week of Historic VolatilityAfter a +48% YTD surge, KOSPI swung through a volatile week of a -12.1% circuit breaker and a +9.6% rebound on Iran's missiles. The 5,200-5,300 200-day average is key support.Jump to section
  2. 02Growth Driver 1: Semiconductor SupercycleKorea's strongest driver is the chip supercycle pulled by AI infrastructure and HBM. Samsung's 65-70T and SK Hynix's 28-32T profit forecasts anchor it, with China's self-sufficiency the risk.Jump to section
  3. 03Growth Driver/Risk 2: Middle East Geopolitical Risk and Oil PricesThe Middle East war is Korea's biggest uncertainty, with 72% Middle East crude the weak point. Base (50-60%) keeps KOSPI 5,200-5,800; Tail Risk (10-15%) means closure and 3,800-4,500.Jump to section
  4. 04Growth Driver 3: Policy Momentum and Value-UpPolicy momentum and value-up are another upside axis. The National Growth Fund and 280-company participation cushion volatility, with foreigners reentering on fundamentals after geopolitical selling.Jump to section
  5. 05KOSDAQ Growth Driver 1: First Active ETF ListingKOSDAQ's first active ETFs lift daily turnover 15-20% and re-rate quality mid-caps. Mirae, Samsung, and Korea Investment offer differentiated exposure to bio, batteries, and AI growth.Jump to section
  6. 06KOSDAQ Growth Driver 2: Biotech Sector Structural GrowthBio is a structural growth axis for KOSDAQ. Samsung Biologics CDMO, Celltrion biosimilars, and Hanmi and Yuhan's GLP-1 obesity drugs drive it, with trial failure and export delays the risks.Jump to section
  7. 07March Comprehensive OutlookThe March outlook centers on the chip supercycle, diversified across bio, defense, dividends, and cash. Whether diplomacy succeeds is the key inflection for KOSPI's direction.Jump to section

KOSPI Status: A Week of Historic Volatility

YTD Flow:

  • 2026.01.02~02.28: surged +48% ( policy + semiconductor strength)
  • 2026.03.03: -7.2% crash (Iranian missile strikes begin, VIX surges)
  • 2026.03.04: -12.1% additional plunge (circuit breaker triggered, worst single-day loss in history)
  • 2026.03.05: +9.6% historic rebound (government support statements, diplomatic negotiation hopes)
  • 2026.03.06: 5,600→5,300 range, profit-taking pressure

Sector Performance (as of 3/6):

  • Semiconductors: Samsung Electronics -1.3%, SK Hynix -1.2% (profit-taking)
  • Defense/Energy: Doosan Enerbility +4.6%, Hanwha Aerospace +4.5% (strength continues)
  • Financials: Mixed, brokerage stocks strong amid elevated volatility
  • Chemicals/Refining: Mixed due to oil price uncertainty

Technical Perspective:

  • Key support: 5,200~5,300 (200-day moving average)
  • Resistance: 5,600~5,700 (short-term overbought zone)
  • RSI: Turned down after breaching 60, overbought caution
IndicatorKOSPI
Key Support5,200~5,300 (200-day moving average)
Resistance5,600~5,700 (short-term overbought zone)
RSITurned down after breaching 60
3/3-7.2% crash
3/4-12.1% plunge (circuit breaker)
3/5+9.6% historic rebound
3/65,600→5,300 profit-taking
Takeaway

After a +48% YTD surge, KOSPI swung through a volatile week of a -12.1% circuit breaker and a +9.6% rebound on Iran's missiles. The 5,200-5,300 200-day average is key support.

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This report is provided for informational purposes only and does not constitute a recommendation to buy or sell any financial instrument. Investment decisions should be made based on your own judgment and responsibility. The analysis and opinions contained herein are based on information available at the time of writing and are subject to change.

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