KOSPI Hit 7,153 Intraday, So Why Did It Pull Back?

Today's Mood

On the last trading day before Chuseok, the KOSPI touched a fresh intraday record of 7,153.99 — then closed up just 0.90%. Buying was concentrated in chip-equipment names, and institutions were the only net buyers holding the index up.

It’s the fourth straight day of gains. But declining stocks (548) outnumbered advancers (311), so the market underneath wasn’t as strong as the index suggests (Seoul Shinmun).

Yesterday's Check, Today's Result

Yesterday we said we’d watch two things: whether foreign and institutional buying continued, and whether SK Hynix kept lagging the rest of the chip rally.

The result is split. Institutions flipped from selling 11.9 billion won yesterday to buying 317.3 billion won today. Foreigners did the opposite, flipping from buyers to net sellers of 510.2 billion won. SK Hynix rose just 1.36% today, again trailing Samsung Electronics (2.70%) — the lag continued.

Up to 7,153 Intraday, Then Pulled Back

KOSPI was strong from the open, hitting a fresh record of 7,153.99 in the morning before profit-taking chipped away at the gain through the afternoon. The 7,080.92 close sits 73 points below that high.

Still, it’s held above 7,000 for a fourth straight session — and it did so on the last session before a four-day break.

Today's Six Biggest Movers

Four of today’s six biggest movers by percentage fell. Aside from Wonik Holdings (+7.40%) and newcomer SK Square (+3.88%), the other four — Daewoo E&C (-6.56%), Doosan Enerbility (-4.85%), Hanwha Aerospace (-3.30%), and Naver (-2.79%) — all declined.

The declines in defense- and nuclear-linked Doosan Enerbility and Hanwha Aerospace stand out. Doosan Enerbility dropped more than 5% with no clear negative catalyst (Jaegyeong Ilbo), in line with a broader valuation-driven pullback across shipbuilding and defense names recently. Hanwha Aerospace had governance-related disclosures — a CEO change and a related-party transaction — but nothing that directly affects operations or new orders (Jaegyeong Ilbo).

Wonik Holdings Triggered a Volatility Halt Before 10 A.M.

Wonik Holdings jumped 12.26% to 29,750 won by 9:37 a.m., triggering a volatility interruption (VI). For beginners: a VI is a two-minute single-price cooling-off period the exchange imposes when a stock moves sharply in a short window — it slows the move, it doesn’t stop it.

No specific disclosure or news explained the surge (CBC News). Its unlisted subsidiary Wonik Robotics has worked with Meta’s AI lab on a tactile robot hand called the Allegro Hand, but that’s a year-old story, not fresh news, so it’s hard to call it today’s actual catalyst. The stock closed up 7.40%, well off its intraday high.

SK Square Rose Again, With No Clear Reason

SK Square gained 3.88% today. Jaegyeong Ilbo reported “no specific disclosure or confirmed positive news,” attributing the move to technical trading and flow-driven demand.

SK Square is a holding company with a stake in SK Hynix, so it’s plausible that interest in the chip rally spilled over. That’s our own reading, though, not a confirmed catalyst.

Daewoo E&C Kept Feeling the Debt-Guarantee Pressure

Daewoo Engineering & Construction fell 6.56% today. The drag appears to be a continuation of pressure that began on the 21st, after the board approved a 157 billion won debt guarantee on September 14th for refinancing the Jayang Five PFV project (Jaegyeong Ilbo). Several new order announcements weren’t enough to offset it.

While our chip-equipment and robotics names rose today, construction, defense, and nuclear names each fell on their own, separate stories.

Samsung Electronics and SK Hynix Still Trade Well Below Target

By our valuation engine, SK Hynix trades at a forward P/E of 3.9x, 71.0% below its analyst target price. Samsung Electronics trades at 4.0x, 66.7% below target. For beginners: P/E divides a stock’s price by its expected earnings — the lower it is, the cheaper the stock looks relative to profit.

KB Securities raised its Samsung Electronics target to 600,000 won in July — more than double today’s closing price of 285,000 won. Even on a day the large-cap chipmakers rallied, that gap stayed wide.

Photo: Un ragazzo chiamato Bi / Flickr (BY-SA 2.0)

Institutions Were the Only Net Buyers

On the KOSPI, institutions net-bought 317.3 billion won, effectively the sole buying force. Retail investors sold 1.44 trillion won and foreigners sold 510.2 billion won (Seoul Shinmun). It’s an unusual combination on a day the index rose — foreigners heading for the exit.

On the KOSDAQ, retail investors net-bought 31.8 billion won, underpinning the chip-equipment rally there (Seoul Shinmun).

Banks and Automakers Fell

Behind the chip rally, banks and automakers moved the other way. KB Financial fell 1.42% and Shinhan Financial fell 2.66%; Hyundai Motor (-1.66%) and Kia (-2.69%) also declined. Money flowing into chips came out of other sectors today.

KOSDAQ and the Won

The won weakened 0.65% to 1,364.3 per dollar. It’s an unusual pairing — the index rising while the won weakens — but it lines up with foreigners flipping to net sellers on the KOSPI today.

The KOSDAQ outran the KOSPI, up 1.21% on retail buying and chip-equipment strength — the hotter of the two markets today.

KOSPI Takes a Four-Day Break, and a US-China Summit Falls Right In the Middle

KOSPI and KOSDAQ close tomorrow (24th) and the day after (25th) for Chuseok, then the weekend, for four days with no trading. The next session is the 28th (Monday).

As it happens, President Trump and President Xi are set to meet in Washington on the 24th (local time), with AI, chip supply chains, and rare earths on the agenda (Money Today). Since Korean markets are closed while that plays out, whatever comes of it likely lands all at once when trading resumes on the 28th.

Back Open on the 28th, After Four Days Off

KOSPI and KOSDAQ are closed the 24th-25th for Chuseok and the 26th-27th weekend, reopening Monday the 28th. In between, the Trump-Xi summit on the 24th is expected to touch on chip export controls, tariffs, and rare earths (Money Today).

Three things to watch on the 28th: whether the summit produced any language on chips or tariffs, whether foreign flows turn to net buying again, and whether names like Wonik Holdings and SK Square — which rallied today without a confirmed catalyst — hold onto today’s gains after the break.

Worth Watching Today

Wonik Holdings moved fast enough to trigger a volatility interruption (VI) by 9:37 a.m., up 12.26% from the prior close. But no specific disclosure or news explained the jump (CBC News).

There’s background worth noting, though. Its unlisted subsidiary Wonik Robotics has worked with Meta’s AI lab, FAIR, on a tactile-sensor robot hand called the Allegro Hand, supplying research institutions like Google, Stanford, and MIT, plus companies including Samsung Electronics and Nvidia (Financial Post). But that collaboration isn’t new — it’s been running for over a year — so it’s hard to point to it as today’s actual trigger.

What today really showed is that a stock carrying the ‘robotics’ label can draw buying regardless of whether there’s an actual catalyst. We’re not chasing this move at today’s price.

President Trump and President Xi meet in Washington on the 24th (local time). Trade and tariffs, AI and tech competition, semiconductors and supply chains, and rare earths are all expected on the agenda (Newspim, Money Today).

The piece that touches Korean markets most directly is chip export controls. Herald Business noted that if the US tightens chip export restrictions on China, Korean chipmakers not caught up in the restrictions could see a relative benefit. If controls ease instead, concerns about China’s own chip self-sufficiency drive could resurface.

As it happens, this summit falls on the first of four straight days Korean markets are closed. Whatever the outcome, it will likely hit all at once when trading resumes on the 28th.