Kai Research

📊 This Week at a Glance The final week of July (7/27–07/31) delivered one of the most extreme bouts of volatility the Korean stock market has ever seen — a single week that packed in both a circuit breaker crash and a record-scale surge. A US-China semiconductor shock sent the KOSPI tumbling for three straight sessions to the 5,500 level, but on the final trading day foreign investors poured in roughly 7 trillion won of net buying, driving a one-day +17.91% explosion that recovered most of the losses. On a weekly basis, however, both indices still closed lower — KOSPI -3.10% and KOSDAQ -5.36% . Index Weekly Open Weekly Close Weekly High Weekly Low Weekly Change Weekly Volume KOSPI 6,806.27 6,595.45 6,806.27 5,262.77 -3.10% 187,766.8만 KOSDAQ 760.54 719.76 780.39 630.99 -5.36% 246,219.6만 The USD/KRW exchange rate spiked to as high as 1,472 won intraday during the sell-off, but as risk appetite recovered it stabilized back toward a weekly close of around 1,442.07 won . 📅 Daily Perform...

📊 This Week at a Glance This week (July 20–24), the Korean stock market delivered one of its most extreme roller-coaster sessions of the year, as semiconductor peak-out fears collided head-on with a Middle East-driven oil shock . Volatility was so severe that sidecars (program-trading circuit breakers) were triggered on five consecutive trading days . The KOSPI managed to defend a marginal weekly gain of +0.71% , but the KOSDAQ fell -3.23% , underperforming its larger peer. Intraday, the KOSPI swung between a low of 6,429.03 and a high of 7,166.00 — a span of roughly 737 points, or over 11%. Index Weekly Open Weekly Close Weekly High Weekly Low Weekly Change Weekly Volume KOSPI 6,643.58 6,690.62 7,166.00 6,429.03 +0.71% 190,572.7만 KOSDAQ 773.21 748.22 790.28 730.81 -3.23% 252,719.3만 The USD/KRW exchange rate closed at an elevated 1,459.42 (week-trading close basis), and came under further upward pressure late in the week as heightened Middle East geopolitical risk boosted safe-haven d...

📊 This Week at a Glance The Korean equity market endured one of its most volatile weeks of the year (July 13–17), whipsawed by resurgent semiconductor peak-out fears , extreme swings in SK Hynix's US-listed ADR, and a surprise benchmark rate hike . The KOSPI tumbled -7.98% for the week and the KOSDAQ dropped -5.70% , surrendering the psychologically important 7,000 and 800 levels respectively. On a daily basis, plunges of nearly 9% alternated with rebounds above 6%, triggering buy- and sell-side sidecars repeatedly as panic-driven, directionless trading dominated the tape. Index Week Open Week High Week Low Week Close Week Volume Weekly Change KOSPI 7,412.03 7,529.07 6,448.86 6,820.60 178,781.8만 -7.98% KOSDAQ 839.72 867.38 749.76 791.84 209,818.9만 -5.70% The USD/KRW exchange rate closed the week near 1,487.46 , hovering close to the 1,490 mark. This persistently elevated won weakness weighed on foreign investor sentiment throughout the week. 📅 Daily Performance Not a single sess...

📊 This Week at a Glance This week (Jul 6–Jul 10) the Korean stock market delivered a rollercoaster session. Fears of an AI and semiconductor peak, combined with anxiety surrounding Samsung Electronics' earnings, drove a sharp mid-week sell-off, before a late rebound powered by a U.S. chip rally and strong demand for SK Hynix's Nasdaq ADR debut. KOSPI tumbled -8.68% for the week, while KOSDAQ held up relatively better at -3.34% . Index Week Open Week High Week Low Week Close Week Volume Weekly Change KOSPI 8,186.82 8,327.26 7,063.76 7,475.94 250,216.1만 -8.68% KOSDAQ 866.40 872.12 778.17 837.43 258,434.1만 -3.34% The USD/KRW exchange rate closed near 1,498.87 won , with the won hovering around the weak 1,500 level throughout the week. The gap between KOSPI's high (8,327) and low (7,064) exceeded 15%, marking an exceptionally volatile week. 📅 Daily Performance The week traced a near 'V-shape' — a steep decline through the first three sessions followed by a strong two...

📌 Weekly Summary A semiconductor "peak-out" shock sent the KOSPI plunging -7.89% in a single session on July 2, triggering a sell-side sidecar (circuit breaker). Yet institutions unleashed aggressive buying on the final day, dramatically reclaiming the 8,000 line. For the week, the KOSPI fell -2.95% while the KOSDAQ rose +0.93% — an extraordinary roller-coaster week. 📊 This Week at a Glance This week (June 29 – July 3), Korean equities absorbed a level of volatility that simple weekly returns fail to capture. The gap between the KOSPI's weekly high of 8,667.73 and its weekly low of 7,378.10 approached 1,300 points. The index closed the week by surging +5.76% on the final session to reclaim the 8,000 mark. Index Weekly Open Weekly High Weekly Low Weekly Close Weekly Change Weekly Volume KOSPI 8,334.28 8,667.73 7,378.10 8,088.34 -2.95% 226,021.8만 KOSDAQ 860.40 955.45 823.98 868.41 +0.93% 300,052.4만 The USD/KRW exchange rate spiked to 1,530.15 , a 17-year high...

📌 Weekly Wrap-Up (Jun 22 – Jun 26, 2026): A brutal roller-coaster week defined by a "Black Tuesday & Black Friday." The KOSPI plunged -6.07% to 8,411.21 and the KOSDAQ collapsed -11.08% to 851.37, with a circuit breaker triggered on Friday amid relentless foreign selling and a surging won-dollar rate. 📊 This Week at a Glance Korean equities suffered one of their most violent weeks on record. Despite a strong mid-week rebound powered by Micron's earnings surprise and SK Hynix's Nasdaq ADR listing hopes, foreign profit-taking and inflation jitters dragged both benchmarks sharply lower into the weekend. The KOSPI's intraweek swing exceeded 1,170 points (high 9,253 / low 8,081), an abnormal level of volatility. Index Week Open Week High Week Low Week Close Weekly Return Weekly Volume KOSPI 8,954.43 9,253.00 8,080.99 8,411.21 -6.07% 226,334.5만 KOSDAQ 957.49 979.58 838.53 851.37 -11.08% 344,053.9만 USD/KRW Week Close 1,535.00 (multi-year high zone) ...

📊 This Week at a Glance This week (June 15–19) the Korean stock market staged an extreme decoupling between the KOSPI and KOSDAQ , driven by the dominance of large-cap semiconductor names. The KOSPI surged +6.17% for the week, breaking into record-high territory, while the KOSDAQ plunged -7.78% , losing the key 1,000 level. Index Week Open Week High Week Low Week Close Weekly Change Weekly Volume KOSPI 8,526.12 9,385.59 8,450.24 9,052.42 +6.17% 270,236.7만 KOSDAQ 1,048.19 1,054.32 946.15 966.59 -7.78% 324,760.2만 The KOSPI climbed as high as 9,385 intraday, extending the so-called ‘250nix’ rally led by Samsung Electronics and SK hynix, while the KOSDAQ swung roughly 10% from its weekly high of 1,054 to a low of 946 amid a liquidity vacuum. 📅 Daily Performance The KOSPI opened the week with an explosive jump and held a four-day winning streak, whereas the KOSDAQ saw its losses accelerate into the back half of the week — a mirror image of the index leader. Date KOSPI Close KOSPI Chang...

📊 This Week at a Glance This week (June 8–12) the Korean stock market hid an extreme roller-coaster ride behind its modest weekly gains. The week opened with a 'Black Monday' circuit-breaker shock, but both indices staged a sharp V-shaped rebound to close higher: the KOSPI rose +0.94% and the KOSDAQ surged +7.24% on the week. Notably, the harder-hit KOSDAQ reclaimed the 1,000 level and far outpaced the large-cap-heavy KOSPI. Index Week Open Week Close Week High Week Low Weekly Change Weekly Volume KOSPI 8,048.09 8,123.62 8,434.40 7,394.46 +0.94% 233,375.3만 KOSDAQ 959.61 1,029.05 1,049.70 908.46 +7.24% 313,946.2만 The KOSPI swung more than 1,040 points between its weekly high of 8,434.40 and low of 7,394.46, and weekly volume exceeded 2.3 billion shares as panic selling and bargain-hunting collided fiercely. 📅 Daily Performance The week followed a classic high-volatility pattern: Monday crash → Tuesday surge → Wednesday pullback → Thursday–Friday consecutive rebounds. Date KO...