Daily Pulse: October 12, 2026
KOSPI -3.65% | KOSDAQ -4.83% | KOSPI opened at 6,578, reached 6,590, then closed at 6,384: foreign cash and futures moved in opposite directions as SK Hynix and Samsung Electronics absorbed KRW 1.56 trillion (~$1.2B) in combined foreign selling while retail stepped in with KRW 1.14 trillion (~$855M)
The Number That Matters
Foreign net cash selling was KRW 2.03 trillion (~$1.5B). SK Hynix and Samsung Electronics accounted for KRW 1.56 trillion (~$1.2B) of that total, or 77% of aggregate foreign selling. The KOSPI closed within 16 points of the session low, surrendering the entire intraday range. The give-back from the session high of 6,590 was 3.12%.
Where the Money Went
Foreign sellers concentrated in SK Hynix at KRW 1.00 trillion (~$752M), Samsung Electronics at KRW 555B (~$416M), SK Square at KRW 222B (~$166M), LG Innotek at KRW 87B (~$65M) and Samsung SDI at KRW 54B (~$40M). Foreign buying in Issuepetasys, Samsung Electro-Mechanics and Daeduck Electronics totalled KRW 156B (~$117M), roughly 9% of foreign selling in the top three names. Among the four institutional sub-categories this report tracks, investment trusts sold KRW 543B (~$407M), private equity sold KRW 540B (~$404M) and pension funds bought KRW 175B (~$131M). Non-arbitrage program trading sold KRW 1.36 trillion (~$1.0B) across the market. Retail bought KRW 1.72 trillion (~$1.3B) net, with Samsung Electronics at KRW 975B (~$731M) the single largest entry. No name drew simultaneous conviction buying from both foreign and institutional investors.
Why the Market Moved
1. Foreign cash sold KRW 2.03 trillion (~$1.5B) while futures bought 3,009 contracts, moving in opposite directions; SK Hynix alone absorbed KRW 1.00 trillion (~$752M) in foreign selling against KRW 164B (~$123M) in retail buying.
2. Non-arbitrage program trading sold KRW 1.36 trillion (~$1.0B) across the market, with total program net selling at KRW 1.27 trillion (~$949M).
3. Samsung Electronics drew KRW 975B (~$731M) in retail buying against KRW 988B (~$741M) in combined foreign and institutional selling in the same name.
The Uncomfortable Question
Retail absorbed KRW 1.72 trillion (~$1.3B) in a session where foreign sellers offloaded KRW 2.03 trillion (~$1.5B) and institutions sold KRW 353B (~$265M). Samsung Electronics alone drew KRW 975B (~$731M) in retail buying against combined foreign and institutional selling that nearly matched it. The question is how long retail can run a two-stock absorption trade in Samsung Electronics and SK Hynix with pension funds on the buy side at only KRW 175B (~$131M) and no name drawing conviction from both foreign and institutional investors simultaneously.
Key Disclosures Today
No material DART filings today.
KoreaAlpha Take
The data does not support a broad recovery. Foreign cash selling in SK Hynix and Samsung Electronics equalled 77% of total foreign net selling, the same concentration structure that has held for multiple sessions, and retail absorbed the bulk of it without institutional partnership. Pension funds bought KRW 175B (~$131M), a reversal from the selling seen in recent sessions, but that figure is too small to change the absorption structure. The scheduled end dates for the buyback programs in both names are 19 and 21 November; as execution advances toward those dates, the price-insensitive bid beneath these names shrinks. The question is whether pension fund buying in SK Hynix grows in the next session or remains a footnote to retail's trade. The trade is simple: watch whether foreign net cash selling in SK Hynix exceeds KRW 1.00 trillion (~$752M) in the next session.
Data sources: Korea Exchange, DART
Research only. Not investment advice. KoreaAlpha does not provide personalised recommendations.
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. Foreign, institutional and retail do not sum to zero: the balance, KRW 668B (~$500M) net bought on this session, sits with other corporations and other foreign investors, categories this report does not collect.
