Seoul — July 22, 2026. Published after the market close; prices are official closing values.
The 30-second version
- The KOSPI closed at 6,797.70, up 0.74% — but that number hides the real story: it opened up 4.51% at 7,052.09, spiked to 7,166.00 intraday, and gave almost all of it back in the afternoon.
- The opening surge tripped the year’s 20th buy-side sidecar, a five-minute halt on program buy orders.
- Foreign investors bought a net KRW 2.63 trillion (~$1.8B) of KOSPI shares today, while individuals and institutions sold into the strength.
- Autos led — Hyundai Motor jumped 4.76% on Boston Dynamics stake speculation — while chips cooled and the KOSDAQ slipped 0.30% to 751.09.
- The won weakened, with USD/KRW at 1,480.1 in Seoul; WTI crude rose 1.90% to $86.52 on Middle East tensions.
A monster open that didn’t survive the afternoon
The setup overnight was about as bullish as it gets for Korea. The Philadelphia Semiconductor Index surged 5.21% in the previous US session, with Micron up 12.17%, and Korean semiconductor export data added to the optimism. The KOSPI gapped up 4.51% at the open and briefly traded above 7,150.
Then the afternoon happened. Two things drained the rally: caution ahead of Alphabet’s earnings report, and rising oil prices tied to Middle East geopolitical risk — WTI closed at $86.52, up 1.90%. By the bell, a 350-point opening gain had shrunk to just under 50 points. The VIX ticking up 2.11% to 17.41 fits the same picture: risk appetite is back, but nerves are close to the surface.
Some context explains why traders sell strength so quickly right now. This has been a brutal July. The KOSPI stood at 8,051 on July 6, then suffered a string of violent drops — including an 8.95% single-day plunge on July 13 and a 6.37% fall on July 16 — bottoming at 6,516 on July 20. Today extends a two-day rebound (+3.56% Tuesday, +0.74% today), but the index is still roughly 1,250 points below its early-July level. In that environment, a 4.5% opening pop is an invitation to take profits.
The sidecar, and who was actually buying
For readers unfamiliar with the term: a sidecar is a Korean market circuit-breaker-lite. When KOSPI futures move sharply, the exchange freezes program trading orders — the automated basket trades that institutions use — for five minutes. Think of it as a speed bump rather than a road closure; regular orders keep flowing. Today’s was the 20th buy-side sidecar this year, a statistic that says a lot about how violent 2026’s swings have been in both directions.
The flow data shows a clear split. In the KOSPI today, foreign investors bought a net KRW 2.63 trillion (~$1.8 billion at ~1,480 won per dollar), essentially holding the index up single-handedly, while individuals sold KRW 1.23 trillion and institutions sold KRW 1.39 trillion.
That continues a pattern. In the previous session (July 21, KOSPI and KOSDAQ combined), foreigners were net buyers of KRW 295.2 billion and institutions bought KRW 1.37 trillion — including KRW 889.1 billion from brokerage proprietary desks — while individuals dumped KRW 1.64 trillion. Over the past five sessions through July 21, cumulative foreign net buying reached KRW 2.71 trillion (~$1.8B). Meanwhile, the sidelined-cash picture as of July 20: investor deposits at brokerages stood at KRW 112.5 trillion (~$76B) and retail margin loans at KRW 33.3 trillion (~$22.5B). In short: foreign money is coming back in, and local retail is selling to them.
Autos led, chips cooled, bio lagged
Despite the semiconductor-driven open, chips were not the day’s winners. Samsung Electronics eked out +0.58% to 260,500 won, but SK hynix — which briefly reclaimed the 2,000,000 won mark intraday — reversed to close down 0.33% on profit-taking. Chip-equipment maker Hanmi Semiconductor fell 4.02%, and the semiconductor sector ETF proxy finished down 0.86% (sector figures here come from KODEX sector-ETF proxies, which can deviate slightly from official indices).
The real leadership came from autos. Hyundai Motor surged 4.76% to 418,000 won and Hyundai Mobis jumped 6.99%, lifted by expectations that the group will acquire the remaining stake in robot maker Boston Dynamics; Kia added 1.52%. By ETF proxy, autos gained 3.72%, construction 3.37%, and steel 2.54%, while bio fell 1.89% — Samsung Biologics dropped 1.65%.
One filing worth flagging: Samsung Epis Holdings disclosed an R&D and commercialization agreement for SBE303, a Nectin-4-targeting solid tumor drug candidate, via Korea’s official DART disclosure system.
For an overnight sentiment check, US-listed Korea proxies from the previous US session were split: the iShares MSCI South Korea ETF (EWY) soared 6.16%, while Coupang fell 4.14% — again, that reflects Tuesday’s US trading, not today’s Seoul session.
Key closing numbers
| Instrument | Close | Change |
|---|---|---|
| KOSPI | 6,797.70 | +0.74% |
| KOSDAQ | 751.09 | -0.30% |
| USD/KRW (Seoul close) | 1,480.1 | +6.7 won |
| Samsung Electronics | 260,500 | +0.58% |
| SK hynix | 1,830,000 | -0.33% |
| Hyundai Motor | 418,000 | +4.76% |
| WTI crude | $86.52 | +1.90% |
| VIX | 17.41 | +2.11% |
| SOX (US, prev session) | 12,356.16 | +5.21% |
What to watch next
- Alphabet earnings — cited as the main source of afternoon caution; a strong print could revive the AI trade that powered today’s open.
- Oil and the Middle East — WTI at $86.52 and climbing is a direct headwind for energy-importing Korea and the won.
- Foreign buying streak — KRW 2.71 trillion of net buying in five sessions; whether it persists will determine if the rebound off 6,516 holds.
- SK hynix and the 2,000,000 won level — the stock touched it intraday and was sold; a decisive close above it would be a sentiment marker.
- The won near 1,480 — continued weakness pressures foreign investors’ dollar returns.
FAQ
Why did the KOSPI give up a 4.5% opening gain on July 22, 2026?
The index opened sharply higher on a 5.21% overnight surge in the Philadelphia Semiconductor Index and strong Korean chip exports, but faded through the afternoon on caution ahead of Alphabet’s earnings and rising oil prices tied to Middle East tensions. It closed up just 0.74% at 6,797.70.
What is a sidecar in the Korean stock market?
A sidecar is a temporary, five-minute halt on program (automated basket) trading orders, triggered when KOSPI futures move sharply. It is milder than a full circuit breaker, which halts all trading. Today’s buy-side sidecar was the 20th of 2026.
Who was buying Korean stocks today?
Foreign investors, almost alone. They bought a net KRW 2.63 trillion (~$1.8B) in the KOSPI, while domestic individuals sold KRW 1.23 trillion and institutions sold KRW 1.39 trillion. Foreigners have now bought roughly KRW 2.71 trillion over the five sessions through July 21.
Why did Hyundai Motor stock jump 4.76%?
Hyundai group shares rallied on expectations that the group will acquire the remaining stake in robotics firm Boston Dynamics, with Hyundai Mobis gaining 6.99% alongside.
Disclaimer: This is an information and analysis publication, not investment advice. See our Methodology for data sources, standards, and our corrections policy.