Yonhap reported that on the 21st the KOSPI closed up 182.92 points (3.29%) at 5,735.66. The index opened at 5,666.34 and rose to the 4% range in the morning (Yonhap). Dong-A Ilbo reported that a buy-side sidecar was triggered around 10:52 a.m. with KOSPI 200 futures up 5.22% at 904.84. Electronic Times counted it as this year’s 25th buy-side sidecar. The Kosdaq rose 1.4% (Yonhap, SBS). Yonhap and SBS reported that investor deposits fell to 90 trillion won and debt-fueled investing fell to 30 trillion won.
Samsung Electronics and SK Hynix carry heavy weight in the KOSPI’s market capitalization, so when the two move 5%, the whole index swings by more than 3%. A buy-side sidecar is a device that for five minutes stops a futures surge from spilling over into spot program buying, so its triggering is itself a signal that the day’s swing has become abnormally large.
Anyone holding a fund or ETF heavy in chips will have felt, in their account value, two straight days of 3% moves in opposite directions. That investor deposits and debt-fueled investing fell together means individual money is leaving the market, so it is a number to watch alongside when judging whether the rebound will last.
One side holds that with AI investment sentiment reviving and foreign net buying returning, the market is past its low. Some brokerage figures appearing on Sampro TV said the downside is limited and discussed how to respond around the 5,500 level.
The other side sees the very pattern of rising and falling 3–4% a day as evidence of anxiety. Yonhap reported that anxiety persists even after the rebound, and some argue that with idle money shrinking, a surge is unlikely to turn into a trend reversal.
What is confirmed: the close of 5,735.66, the 3.29% gain, the buy-side sidecar in the morning and the 1.4% rise in the Kosdaq. The final amount of foreign net buying is unconfirmed. Today we watch whether foreign buying continues the day after the rebound, and what signal the Bank of Korea’s base rate decision sends to the market.
Yonhap (KOSPI closes at 5,735.66, 10/21) · Dong-A Ilbo (buy-side sidecar triggered, 10/21) · SBS (Kosdaq and deposits, 10/21) · Electronic Times (this year’s 25th buy-side sidecar, 10/21)
Economy · MarketsPress ✓ 4 outlets · final size of foreign net buying unconfirmed
KOSPI rises 3.29% to close at 5,735.66… intraday surge into the 4% range triggers first buy-side sidecar in two months
A day after a 3.73% plunge, the index moved more than 3% in the opposite direction
Yonhap reported that on the 21st the KOSPI ended the regular session at 5,735.66, up 182.92 points (3.29%) from the previous trading day. The index opened up 113.60 points (2.05%) at 5,666.34 and widened its gain to the 4% range in the morning. Dong-A Ilbo reported that around 10:52 a.m. a buy-side sidecar was triggered after KOSPI 200 futures stayed up 5% or more from the previous trading day for over a minute, with futures at 904.84, up 5.22%, at the time. Dong-A Ilbo explained that when a buy-side sidecar is triggered, the effect of program-trading buy orders is suspended for five minutes. Yonhap said it was the first buy-side sidecar in two months, and Electronic Times counted this year’s KOSPI buy-side sidecars at 25, which with 27 sell-side ones brings the total to 52. Dong-A Ilbo and Kyunghyang Shinmun reported that the index regained the 5,800 level intraday. Yonhap and SBS reported that the Kosdaq also rose 1.4%. Yonhap reported that as AI investment sentiment revived, Samsung Electronics and SK Hynix, known together as ‘Samjeon-Nix,’ rose 5%, and foreign net buying continued during the session.
The day before had gone the opposite way. SBS reported that on the 20th the KOSPI plunged 3.73% to close at 5,552.74. Yonhap reported that with the KOSPI on a roller coaster of 3–4% daily rises and falls, anxiety persists even after the rebound. Yonhap and SBS reported that investor deposits, the idle money waiting on the sidelines, fell back to 90 trillion won, and margin-loan balances, the so-called ‘debt-fueled investing,’ also fell to 30 trillion won. Chosun Ilbo reported that up to the day before the rebound the KOSPI had sunk to its lowest level in six months. Chosun Ilbo said iM Securities analyzed that foreign net selling of 200 trillion won weighs on the index even with a stronger won. The won stayed strong. Yonhap and SBS reported that on the 21st, on strong chip exports, the won-dollar rate set a new yearly low for the fourth straight session and stayed in the low 1,320s.
Unfold the story and DailyDrop’s take
The Korean Central News Agency reported on the 21st that Pak Jong-chon, adviser to the Ministry of National Defence, inspected a southern border fortification site on the 20th with Secretary Ri Il-hwan, department head Kim Yo-jong and General Staff commanders (Yonhap, Kyunghyang Shinmun). Yonhap reported that North Korea put forward “immediate counterattack if provoked by the enemy.” Dong-A Ilbo reported that Kim Yo-jong mentioned an order to make the border line the most permanent of lines. In a statement on the 21st, Kim said, “within October, psychological-warfare loudspeakers against the Republic of Korea will go into operation along the entire border” (Dong-A Ilbo, Kyunghyang Shinmun). Kyunghyang Shinmun reported that Kim took issue with the South Korean military’s warning broadcasts and warning shots.
Since 2024 North Korea has pressed ahead with ‘border fortification,’ laying walls and landmines along the military demarcation line, and in the process incursions across the line and warning shots by the South Korean military have repeated. Loudspeakers are a psychological-warfare tool that the two Koreas have repeatedly turned on and off against each other, so an announcement that they will operate is taken as an act raising border tension a notch.
Residents of border areas may directly experience loudspeaker noise and military countermeasures. If you plan border tourism or a visit, check the access-control notices from the local government and the military.
One side sees Kim Yo-jong’s statement as a flat rejection of the South Korean military’s demand, after the landmine explosion, to halt the fortification, and, as Chosun Ilbo reported, as North Korea in effect refusing the demand. There is concern that resuming loudspeakers raises the risk of accidental clashes.
The other side sees North Korea as calibrating the level of its warning through statements and inspection reports. Some read the setup in which Chairman Kim Jong-un does not step forward himself while Pak Jong-chon and Kim Yo-jong are out front as putting more weight on a pressure message than on actual action.
What is confirmed: the inspection on the 20th, the Korean Central News Agency report on the 21st and Kim Yo-jong’s statement on the 21st about loudspeakers ‘within October.’ When and where the loudspeakers will actually be turned on is unconfirmed. Today we watch the level of the official response from the South Korean military and government.
Yonhap (Pak Jong-chon and Kim Yo-jong inspection, 10/21) · Kyunghyang Shinmun (Kim Yo-jong loudspeaker statement, 10/21) · Dong-A Ilbo (full Kim Yo-jong remarks, 10/21) · Chosun Ilbo (‘historic mission’ remark on fortification, 10/21)
North Korea · BorderPress ✓ 4 outlets · date and location of loudspeaker activation unconfirmed
Kim Yo-jong: “Loudspeakers aimed at the South to go into operation along entire border within October”… inspects fortification site with Pak Jong-chon
The Korean Central News Agency reported on the 21st that Pak Jong-chon, adviser to North Korea’s Ministry of National Defence, the day before inspected key points of a southern border fortification construction site together with Ri Il-hwan, a Workers’ Party secretary, Kim Yo-jong, head of the Workers’ Party General Affairs Department, and senior commanders of the Korean People’s Army General Staff, Yonhap, Kyunghyang Shinmun and SBS reported. Yonhap reported that North Korea said at the event it would “counterattack immediately if provoked by the enemy.” Dong-A Ilbo reported that Kim Yo-jong said, “The head of state must yield not a single inch in exercising territorial sovereignty,” and “ordered that the border with a hostile state be made the most permanent of lines.” Chosun Ilbo reported that Kim said “the historic undertaking of making the southern border permanent can never be reversed,” and added that the South Korean military has demanded a halt to the fortification work since a landmine explosion in the Demilitarized Zone (DMZ) on the 21st of last month. Kim Yo-jong also issued a statement that evening. According to Dong-A Ilbo and Kyunghyang Shinmun, Kim said, “Our tactical hunting parties are occupying new positions,” and “within October, psychological-warfare loudspeakers against the Republic of Korea will go into operation along the entire border.” Yonhap also carried the same remarks as breaking news. Kyunghyang Shinmun reported that Kim claimed that “today at two places we carried out warning broadcasts and warning shots” toward South Korean troops. When and where the loudspeakers will actually be switched on has not been confirmed.
Unfold the story and DailyDrop’s take