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Goldman Sachs Global Investment Research Department's South Korea stock analyst Chris Cha stated in a report on September 23 that KOSPI has the conditions for a short-term tactical breakout, but the continuous flow of liquidity from South Korean retail investors into the cryptocurrency market will make the index's subsequent upward movement more reliant on foreign capital and local institutions reconfiguring. The report noted that concerns about the Federal Reserve's interest rates have been partially digested by the market, and risk appetite has shifted towards proxy AI themes.The report pointed out that South Korean memory chips provide fundamental support, with fourth-quarter DRAM contract prices expected to grow double digits quarter-on-quarter, and the ramp-up of HBM4 capacity will continue to limit the supply of standard server DRAM. Samsung Electronics' large shareholder returns, continuous buying by institutions, and foreign capital turning into net buying may drive KOSPI towards the resistance zone of 7000 to 7200 points.The report also indicated that the capacity of local South Korean retail investors to absorb has weakened. After Bitcoin returned to $85,000, cryptocurrency trading in South Korea has heated up. According to DefiLlama data cited in the report, Upbit's single-day spot trading volume on June 13 was approximately $770 million, which rose to $1.817 billion on September 22, an increase of about 136%. Based on the total trading volume of $3.27 billion on that day across South Korea's five major trading platforms, Upbit alone accounted for over half. Goldman Sachs believes this will make KOSPI more reliant on foreign and institutional buying in the future, and October is a critical window to test whether foreign capital will continue to increase its investment in South Korean semiconductor and AI assets.

According to Gate quotes, the South Korean KOSPI index closed down 57.13 points, a decrease of 0.85%, at 6627.24 points; the Nikkei 225 index closed down 8.89 points, a decrease of 0.01%, at 63484.10 points.

The Bank of Korea recently reviewed the reasons for the fluctuations of the Korea Composite Stock Price Index (KOSPI) in the "Monetary and Credit Policy Report for September 2026." The report shows that as the KOSPI continues to rise, the contribution rates of Samsung Electronics and SK Hynix to the index's increase have rapidly increased.Especially during the process in June this year when the KOSPI surged from 8000 points to 9000 points, the contribution rates of these two stocks to the index's rise reached as high as 99%.

The Sui development team co-founder of Mysten Labs, Kostas Kryptos, stated that Havenex is undergoing Series A financing and is about to complete it. All necessary license applications and some additional license applications have been submitted, and the financing amount is also close to being fully allocated.Havenex is not positioned to become another Coinbase, Binance, Bybit, or Kraken, but rather to provide infrastructure for financial institutions, enabling them to offer digital assets and traditional financial assets to clients while meeting regulatory, custody, security, and transparency requirements. Havenex plans to support a multi-chain architecture, verifiable custody, continuous solvency proof, default multi-signature, quantum-resistant keys, hardware two-factor authentication wallets, as well as self-custody and key loss protection mechanisms; in regions where regulations allow, it will also support privacy assets and RWA. The project will use Sui technology in suitable scenarios while integrating assets, bridging protocols, and foundational components from other ecosystems.The concept of Havenex was proposed by him, and he will currently participate as an advisor, but Mysten Labs and Sui remain his main focus. He stated that the project aims to establish transparency and security standards different from those of FTX and Mt. Gox, and to reduce the serious vulnerability risks caused by code generated by large language models recently.

According to Gate market data, the South Korean KOSPI index rose 11.5% this week, ending a seven-week decline trend.

According to Gate market data, the South Korean KOSPI index rose 3.38% in early trading, Samsung Electronics rose 4%, and SK Hynix rose 5%.

According to Gate market data, the South Korean KOSPI index surged 5% during the day, currently reported at 6,665.78 points.

According to Gate market data, the South Korean KOSPI index has expanded its decline to 3%, SK Hynix's stock price has dropped by 7%, and Samsung Electronics has fallen by nearly 3%.

According to Jinshi reports, the Korea Exchange has launched a sidecar mechanism for the KOSDAQ, suspending programmatic trading for 5 minutes.

According to Jinshi reports, foreign investors net bought KOSPI stocks worth 7.2 trillion won on Friday, setting a historical record.

According to Gate market data, the Korean Composite Stock Price Index (KOSPI) has risen above 6600 points, with an intraday increase of 18%. Previously, ChainCatcher reported that Samsung Electronics and SK Hynix both set new records for single-day gains.

According to Gate market data, the South Korean KOSPI index surged 14% during the day, currently reported at 6,385.83 points.

According to Gate market data, the South Korean KOSPI index rose 5% during the day, currently reported at 5,950.55 points.Samsung Electronics rose by 7%, and SK Hynix increased by 3.2%.

According to Gate market data, the South Korean KOSPI index fell below 5,500 points, down 8.73% during the day.

According to Jinshi reports, the Korean Exchange has activated the circuit breaker mechanism for the KOSDAQ index, suspending trading for 20 minutes.

The Korea Exchange triggered a circuit breaker due to an 8% drop in the KOSPI index, suspending trading for 20 minutes.

The South Korean trading platform (KRX) triggered the sidecar mechanism due to fluctuations in the KOSPI index, suspending programmatic trading for about 5 minutes.The sidecar mechanism is mainly used to respond to severe fluctuations in a short period of time, limiting only programmatic trading while manual trading can continue normally. Unlike the circuit breaker mechanism, the sidecar mechanism does not suspend trading for the entire market and is more viewed as a "speed bump" during market volatility.In contrast, the circuit breaker mechanism is typically used in extreme market conditions and, once triggered, suspends trading for the entire market to prevent panic-induced fluctuations from further escalating.

According to Gate market data, the South Korean KOSPI index opened down more than 5%, SK Hynix fell over 8%, and Samsung Electronics dropped 6%. The Nikkei 225 index opened down 0.6%.

According to Gate market data, the Nikkei 225 index closed up 320.04 points on July 27 (Monday), an increase of 0.5%, reporting at 64,931.19 points.The South Korean KOSPI index also closed up 65.12 points on the same day, an increase of 0.97%, reporting at 6,755.74 points, with SK Hynix rising 3.5% and Samsung Electronics rising 2%.