On the morning of the 31st, the domestic stock market recorded an explosive gain of over 12% compared to the previous trading day right from the opening bell.

As of 9:22 a.m., the KOSPI stood at 6,311.81, surging 718.25 points (12.84%) from the previous trading day. A massive influx of program buying from the early minutes of trading has spread strong investor sentiment throughout the broader market.

■ Top Market Cap Stocks Rally Across the Board Large-cap stocks with the highest market capitalizations are leading a broad upward rally. Samsung Electronics rose 19.08% to 246,500 won, while SK Hynix climbed 21.86% to trade at 1,611,000 won.

Samsung Electronics Preferred Shares also jumped 19.93%, with SK Square surging 27.16% and Samsung Electro-Mechanics soaring 29.92%, further widening their gains. Hyundai Motor is also showing strong performance, rising more than 7%.

■ Drivers of the Surge: U.S. Tech Stock Rebound + Foreign Buying Concentrated in Semiconductor Stocks The market's sharp rally is attributed to a significant improvement in investor sentiment overnight in the U.S. stock market, centered on semiconductor and technology stocks, combined with a concentration of foreign buying in large-cap domestic semiconductor stocks.

Earlier, in both the Korea Exchange and the KOSDAQ market, buy-side circuit breakers were triggered as program buy orders surged, signaling signs of an overheating market.

■ Need to Watch for the Possibility of Expanded Volatility Analysts note that as top large-cap stocks by market value drive the index higher, attention is needed regarding whether the upward trend can be sustained during trading hours and the possibility of expanded volatility.

[※ Investment decisions are the responsibility of the individual, and this article is not intended to recommend investment in any specific stock.]