Daily Pulse: September 3, 2026
KOSPI +0.26% | KOSDAQ -1.71% | Foreign futures +3,077 contracts while cash net sold for a fifth consecutive session
The Number That Matters
Woori Financial Group drew KRW 432B (~$318M) in foreign net buying, more than fourteen times the next largest foreign buy, Hyundai Motor at KRW 30B (~$22M). SK Hynix took KRW 378B (~$278M) of foreign net selling on the other side. One financial stock dominated the foreign buy list; one semiconductor stock dominated the foreign sell list. Whether the two legs belong to the same decision is not something a single session's data can show.
Where the Money Went
Foreign cash net selling of KRW 65B (~$48M) masked a sharp internal split: KRW 432B (~$318M) into Woori Financial, against KRW 378B (~$278M) out of SK Hynix and KRW 154B (~$113M) out of Samsung Electro-Mechanics. Institutions net bought KRW 731B (~$538M), and securities firms within that total accounted for KRW 928B (~$684M) of net buying while investment trusts sold KRW 125B (~$92M) and pension funds sold KRW 66B (~$49M); the securities firm figure includes program trading, block execution and trust-based buybacks that this data does not separate. Retail sold KRW 660B (~$486M) net, distributing Samsung Electro-Mechanics KRW 246B (~$181M) and Alteogen KRW 129B (~$95M). Woori Financial and Samsung Heavy Industries were the only two names on both the foreign and the institutional buy lists, and Samsung Heavy Industries also appeared on the retail sell list at KRW 57B (~$42M).
Why the Market Moved
1. Foreign futures net buying of 3,077 contracts provided index support while cash net selling of KRW 65B (~$48M) stayed small, keeping KOSPI at +0.26%.
2. Institutional net buying was dominated by a single name, POSCO International at KRW 951B (~$700M), a figure of the same order as the securities firm category's KRW 928B (~$684M) net; the data does not say whether the two are the same flow.
3. Citi cut price targets on Samsung Electronics and SK Hynix citing KRW exchange rate pressure, and both names sat on the foreign and institutional sell lists.
The Uncomfortable Question
Foreign cash has now net sold for five consecutive sessions. Over the last two sessions the cash and futures legs diverged: today cash sold while futures bought 3,077 contracts; yesterday both legs sold, with futures at 8,107 contracts. The question is whether today's futures buying is a reversal of yesterday's direction, or whether two sessions of opposing cash and futures flow are daily position management with no directional signal in either day.
Key Disclosures Today
POSCO Holdings filed an amended treasury share disposal result report on DART.
KoreaAlpha Take
The semiconductor selling is intact: SK Hynix absorbed KRW 378B (~$278M) of foreign net selling and KRW 300B (~$221M) of institutional net selling in the same session, while Citi lowered targets citing currency pressure. The largest foreign buy of the day ran through one financial stock, Woori Financial at KRW 432B (~$318M), and the largest institutional buy through one trading name, POSCO International at KRW 951B (~$700M). Two single-name prints of that size on a day when the foreign market total netted to KRW 65B (~$48M) are the fact; whether they were block execution or a change of view is not in this data. The trade is simple: watch whether foreign cash buying in Woori Financial repeats on the next session while SK Hynix selling persists.
Flow figures are KRX investor-type trading value across all listed boards (KOSPI, KOSDAQ, KONEX), common stock only, excluding ETF, ETN and ELW; institutions = the KRX institutional total investor type.
Research only. Not investment advice. KoreaAlpha does not provide personalised recommendations.
