started · updated
South Korea's Kospi surges record 18% on AI chip rally
On July 31 2026 the South Korean Kospi index jumped roughly 18 percent, its largest single‑day gain, after a three‑day sell‑off that had erased more than 17 percent of its value. The rally was driven by massive gains in the country’s two leading chipmakers: Samsung Electronics shares rose about 27‑28 percent and SK Hynix shares surged close to the 30 percent daily limit.
The surge followed strong U.S. earnings from Microsoft and Amazon, which exceeded expectations and revived confidence in artificial‑intelligence‑related spending. The Nasdaq 100 index rose more than 3 percent after those results, while Japan’s Nikkei 225 climbed about 4 percent. The Bank of Japan left its policy rate unchanged at 1.00 percent, and the Japanese yen weakened but was partially supported by coordinated intervention. Bitcoin stayed near $64 000, showing little correlation with the equity rally.
The rally also lifted other Asian markets, with Taiwan’s Taiex up nearly 8 percent and broader Asia‑Pacific indices posting gains. Analysts said the bounce reflected a rapid reversal of risk‑off positioning rather than a fundamental change in the economy.
Entities
Amazon · Amazon.com Inc · Amazon.com, Inc. · Bank of Japan · Japanese yen · KOSDAQ · KOSPI · KOSPI index · Korea Exchange · Microsoft · Microsoft Corp · Microsoft Corp.
Claims
What the coverage asserts, and how many sources carry each claim.
- [○ 1 SOURCE] A 2× leveraged ETF tracking SK Hynix posted an intraday return of over 55%.
- [○ 1 SOURCE] KOSPI opened at 5,657.79 and rose to about 6,386 by mid‑day.
- [● 2 SOURCES] Foreign investors net bought about 3.2 trillion won of Korean stocks on that day.
- [○ 1 SOURCE] Domestic institutional investors net sold roughly 2.1 trillion won while individuals net sold about 2.37 trillion won.
- [● 2 SOURCES] The Korea Exchange activated a buy‑side sidecar halt on both the KOSPI and KOSDAQ markets.
- [○ 1 SOURCE] KOSPI rose 12.82% to 6,310.50 on the morning of 31 March, recovering above the 6,300 level.
- [● 2 SOURCES] SK Hynix shares jumped between 22% and 27% during the rally.
- [● 2 SOURCES] Samsung Electronics shares rose roughly 20% in early trading.
- [● 9 SOURCES] The KOSPI index rose more than 12% on July 31, 2026. biz.heraldcorp.com · tennews.in · wixx.com · cashcow.nl
- [● 2 SOURCES] Domestic institutional investors net sold roughly 2.1 trillion won, while individual investors net sold about 2.3–2.4 trillion won. biz.heraldcorp.com
- [● 7 SOURCES] Foreign investors net bought around 3.2–3.5 trillion won of Korean equities during the session. biz.heraldcorp.com · cashcow.nl · www.cnbce.com
- [● 7 SOURCES] The Korea Exchange activated buy‑side sidecar trading halts on the KOSPI and KOSDAQ markets. biz.heraldcorp.com · cashcow.nl