KOSPI Falls 3.48% on Oct 30, Cybersecurity Stocks Rise 3.27%: Why?
KOSPI closed down 3.48% on October 30, and the real story is where money moved.
Today's Numbers First
As of the October 30, 2026 close, KOSPI finished at 5,730.74 (-3.48%) and KOSDAQ at 724.38 (-3.83%).
Relative strength gathered in cybersecurity, CMO/CDMO contract manufacturing, and esports.
Weakness concentrated in PCB, semiconductor substrates, semiconductor back-end and test, and 3D printing.
Only data that passed the index date and theme price cache freshness checks was used.
A single session signal needs confirmation from next session trading value and flows.
- KOSPI 5,730.74 (-3.48%)
- KOSDAQ 724.38 (-3.83%)
- Strong themes today: Cybersecurity, CMO/CDMO contract manufacturing, Esports
This covers the Korean market close on October 30, 2026, along with global macro indicators and strength across 100 investment themes.
Use it as a starting point for gauging the next session's opening.
Where the KOSPI Index Lost Ground
| Index | Close | Change | Change % |
|---|---|---|---|
| KOSPI | 5,730.74 | -206.92 | -3.48% |
| KOSDAQ | 724.38 | -28.85 | -3.83% |
Global Macro Snapshot
| Indicator | Value | Daily Change |
|---|---|---|
| VIX (Fear Index) | 18.31 | - |
| US 10-Year Yield | 4.989% | - |
| Dollar Index (DXY) | 101.68 | - |
| USD/KRW | ₩1,333.80 | - |
| S&P 500 | 7,720.39 | - |
| Nasdaq | 26,184.72 | - |
| WTI Crude | $103.53 | - |
| Gold | $4,005.00 | - |
| Bitcoin | $77,873 | - |
Why Cybersecurity Stocks Stood Out
| Rank | Theme | Avg Change | Up/Down | Leading Gainer |
|---|---|---|---|---|
| 1 | Cybersecurity | +3.27% | 12/5 | AhnLab (053800) +17.98% |
| 2 | CMO/CDMO Contract Manufacturing | +1.93% | 2/2 | Samsung Biologics (207940) +8.86% |
| 3 | Esports | +1.76% | 2/0 | SOOP (067160) +2.91% |
Which Themes Fell the Most?
| Rank | Theme | Avg Change | Up/Down | Leading Laggard |
|---|---|---|---|---|
| 1 | PCB, Semiconductor Substrates | -8.66% | 0/9 | Daeduck Electronics (353200) -13.60% |
| 2 | Semiconductor Back-End, Test | -8.43% | 0/10 | TSE (131290) -14.78% |
| 3 | 3D Printing | -7.95% | 0/3 | Rokit Healthcare (376900) -13.57% |
What to Confirm Next Session
- Both markets sold off together (KOSPI -3.48%, KOSDAQ -3.83%), so a macro shock check is needed.
The strength of the next session's rebound will mark the turning point for trend judgment.
- Bottom 3 themes averaged -8.35%, with selling concentrated in weak themes.
A short-term rebound from oversold levels is possible, but calling a trend reversal is premature.
One session of data is not enough to decide on. Judge alongside a trend of five or more sessions and macro changes.
Dig Deeper
- Weekly reports and insights: PickStock Insight
- How to use macro indicators: Three Indicators That Measure the Market's Temperature
- Theme-linked stock mind map: PickStock Theme Explorer
Report date: 2026-10-30. Data sources: Naver Finance, Yahoo Finance, CNN Fear & Greed. Generated after checking price outliers and the reference date. This is for informational purposes only and is not investment advice or a recommendation.
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관심 테마로 저장하면 마이페이지에서 다시 볼 수 있고, 강한 움직임이 생길 때 주간 테마 시그널과 연결해 확인할 수 있습니다.
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