[2026-07-28] Korea Stock Market Morning Preview | Semiconductors Eye Rebound Momentum Amid Mixed US Close

📌 One-Line Summary

US markets closed mixed overnight, with the Dow firm but the Nasdaq slipping. The key question today is whether the KOSPI (6,755.75) and KOSDAQ (764.86) — which rebounded sharply on the back of semiconductor supply-chain names in the previous session — can absorb the Nasdaq's weakness and carry their upward momentum forward. Surging oil prices and a stubborn USD/KRW rate above the 1,460 level remain key swing factors.

🌙 Overnight Markets

The three major US indices diverged overnight. The Dow, led by cyclical and value stocks, held firm, while concerns over AI investment costs and surging oil prices weighed on tech names, dragging the Nasdaq into negative territory. The S&P 500 finished only marginally higher.

IndexCloseChange
Dow Jones52,210.08+0.51%
S&P 5007,413.18+0.02%
Nasdaq24,932.08-0.18%

Skepticism over the profitability of large-scale AI spending, combined with concerns that a spike in oil prices could push interest rates higher, brought valuation pressure on growth stocks into focus. In contrast, the Dow — stacked with defensive blue chips — held up relatively well, highlighting the temperature gap between the indices. For Korean equities, the key issue will be how well the market can digest the Nasdaq's weakness.

In the previous session, Korean indices staged a strong rebound: the KOSPI rose +0.97% to 6,755.75, and the KOSDAQ jumped +2.22% to 764.86, driven by strength in semiconductor supply-chain (materials, parts and equipment) names. The KOSDAQ's 2%-plus surge reflected buying interest concentrated in small- and mid-cap growth and supply-chain stocks. Notably, even as US semiconductor shares tumbled, domestic supply-chain names rebounded more than 5%, suggesting the Korean semiconductor value chain is partly decoupling from the US-driven weakness. How long that decoupling can persist — should the Nasdaq weaken further — remains to be seen.

IndexPrev. CloseChange
KOSPI6,755.75+0.97%
KOSDAQ764.86+2.22%

💱 FX & Commodities

The USD/KRW exchange rate stands at 1,464.96, keeping the burden of a high won-dollar rate above the 1,460 level firmly in place. A high FX rate acts as a constraint on foreign investor flows, though some observers note that with foreign investors returning recently, downward pressure on the rate may be gaining the upper hand. International oil prices are surging on rising US-Iran geopolitical uncertainty, which warrants caution as it could translate into upward interest-rate pressure and a higher valuation discount rate for equities. Bitcoin is trading around the 64,542 dollar level.

ItemValue
USD/KRW1,464.96
Bitcoin (USD)64,542.99

🔥 Today's Key Themes & Sectors

1. Semiconductors (Supply Chain & Large Caps) — Watch

In the previous session, domestic semiconductor supply-chain names rebounded more than 5%, showing independent strength decoupled from the weakness in US chip stocks. The issue of SK Hynix's American Depositary Receipts (ADRs) trading at a 16–51% premium over the underlying Korean shares is expected to continue influencing sentiment toward large-cap semiconductor names. The key point to watch today is whether supply-chain-led strength can persist even as the market absorbs the Nasdaq's weakness.

2. Refining & Energy — Expected to Rise

With international oil prices surging on US-Iran geopolitical risk, refining and energy-related stocks are expected to benefit. That said, if the oil-price spike spills over into inflationary and interest-rate pressure, it could cut both ways for the broader market, so caution is warranted. Rising oil prices are a short-term tailwind for refiners and energy names, but may conversely pressure cost-sensitive industries such as airlines, shipping and chemicals — raising the possibility of sector-by-sector differentiation.

3. Banks & Value Stocks (High-Rate Beneficiaries) — Watch

With upward interest-rate pressure from surging oil prices coinciding with the hawkish stance of Bank of Korea Governor Shin Hyun-song, interest-rate-sensitive sectors such as banks and insurers may warrant attention. This is a phase where their relative appeal versus growth stocks comes into focus.

4. AI & Growth Stocks — Caution

With US tech names weakening on concerns over AI investment costs, domestic growth stocks may also face downside risk should valuation-discount pressure widen.

🎯 Scenario Outlook

📈 Bull Case

If domestic semiconductors extend their supply-chain-led strength regardless of the Nasdaq's weakness and foreign net buying flows in, the KOSPI could attempt to reclaim the 6,800 level and the KOSDAQ could settle above 770. Supported by a firm Dow and FX stability, the previous session's rebound may be extended.

➖ Neutral Case

With the mixed US close clashing against the burdens of a high FX rate and surging oil, the KOSPI is likely to trade in a 6,700–6,800 range and the KOSDAQ in a 755–775 band. A theme-rotation market centered on semiconductors, refining and energy may unfold.

📉 Bear Case

If AI investment concerns and oil-driven rate increases combine to transmit the Nasdaq's weakness to domestic growth stocks, and foreign investors exit under the burden of a high FX rate, the KOSPI could fall below the 6,700 level and the KOSDAQ could test support at 750.

IndexSupportResistance
KOSPI6,7006,850
KOSDAQ750780

⚡ Key Checkpoints for Today

  • Whether domestic semiconductor stocks sustain their decoupling from Nasdaq weakness, and the trajectory of the SK Hynix ADR premium
  • Direction of international oil prices amid US-Iran geopolitical risk, and the resulting interest-rate pressure
  • Shifts in foreign investor flows amid a persistent USD/KRW rate above 1,460
  • Global monetary-policy variables including RBA Governor Bullock's remarks (12:05 KST) during the session

📅 Today's Economic Events

Global (High Impact)

Time (KST)CountryEventForecast/Previous
12:05Australia (AUD)RBA Gov Bullock Speaks- / -

Domestic

There are no major DART disclosures scheduled today. However, remarks by Bank of Korea Governor Shin Hyun-song on rate policy, prices and FX, along with the overall direction of monetary policy, remain a market focus and warrant close attention to the related news flow. At his first Monetary Policy Board meeting, Governor Shin signaled a hawkish hold, hinting at a rate hike within the year — so in a phase of high FX and surging oil prices, the direction of monetary policy and its impact on rate-sensitive sectors and foreign flows should be watched together.

Meanwhile, overseas, Korean retail investors' net buying of US stocks has exceeded 4 trillion won this month, with the expansion of individual overseas investment being cited as a factor behind won weakness. Amid heightened volatility in the domestic market, US equities have shown relatively firm performance, prompting capital rotation — making it a point of interest how this flow structure affects the trading behavior of foreign and retail investors in the Korean market today.

⚠️ Investment Disclaimer

Disclaimer: This post is for informational purposes only and does not constitute investment advice. All investment decisions are the sole responsibility of the investor. Past performance does not guarantee future results. With external and internal variables — a mixed US close, surging oil prices and a high FX rate above 1,460 — acting in combination, volatility may widen, so please manage your risk accordingly.

🇰🇷 Korean Version: https://kai-search.tistory.com/manage/posts/

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