KOSPI -3.26% Stumbles, Nvidia Fall Sparks How Much Shock in Korean Semiconductors?

AI slowdown signs hit first, and semiconductors flinched.

Overnight US news dimmed the mood before the Korean open.

Retail: "If Nvidia falls, do our semiconductors follow?"

Yes, there is clear linkage.

However, today calls for watching sector and stock-level differentiation.

How was the Korean market yesterday? (Source: closing prices as of 2026-09-15 08:20 KST)

KOSPI: 6,684.37 (-3.26%)

KOSDAQ: 806.79 (-1.69%)

(Note) The indices fell sharply the previous day.

The drop was concentrated in semiconductors and IT.

What were the overnight global signals?

US IT and semiconductors: +0.91% (sector average)

AI slowdown news: multiple reports including Nvidia declines

Bitcoin ETF: $460 million net outflow → observed capital movement into altcoins

(Note) AI demand slowdown concerns pressured semiconductor valuations.

Three things to watch in early trading this morning

1) Foreign selling/buying flow, liquidity comes first.

2) HBM and data center names reaction, check for divergence from Astra expectations.

3) Crypto capital shifts, confirm whether the $460 million Bitcoin ETF outflow spreads to broader risk assets.

Glossary

Polymarket bet → a prediction market that briefly shows how the market views the likelihood of a Fed rate cut.

So, up or down?

Downside forces

• AI slowdown news - Nvidia declines, semiconductor valuation reappraisal

• KOSPI closing -3.26%, weaker risk sentiment

• Bitcoin ETF net outflow - $460 million, pressure from crypto capital movement

Supportive forces

• US IT and semiconductor sector average +0.91%, implying mixed signals and possible within-sector differentiation

• HBM-related positive news and demand expectations, some names may rise on news

• Polymarket shows 100% 'no' for an in-year rate cut, stabilizing expectations

Early-market direction will likely hinge on flows from foreigners and institutions, and on within-sector differentiation.

Monitor intraday moves on 실시간 뉴스.

This is for reference only.

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※ This article is for information purposes only and is not investment advice.

※ Investment decisions and responsibility rest with the investor.

※ Figures are as of the time of writing and may change.