AI Boom Sparks Global Market Optimism with South Korea Leading Rally

Global markets are showing renewed optimism driven by a strong rebound in the artificial intelligence (AI) sector and robust second-quarter earnings reports. Major U.S. tech companies reported better-than-expected results and aggressive growth forecasts, fueling investor confidence and sparking a fresh wave of gains. This positive momentum extended to Asian markets, with South Korea's KOSPI index surging 4.1%, officially entering bull market territory after recovering about 23% from late July lows. The rally was led by chipmakers Samsung Electronics and SK Hynix, boosted by renewed enthusiasm for AI investments and strong U.S. AI company earnings.

In Japan, the Nikkei 225 rose 1.6%, while China’s Shanghai Composite and Hong Kong’s Hang Seng showed more modest gains. Analysts highlighted that the AI investment boom is far from over, with the South Korean rally signaling a broader rotation back into technology stocks. On Wall Street, futures traded mixed but stable, following a day where the Nasdaq led gains with a 0.5% rise, the S&P 500 increased 0.3%, and the Dow Jones remained flat. The Russell 2000 small-cap index hit record highs, reflecting growing investor risk appetite.

Strong earnings and optimistic forecasts from AI infrastructure and cloud companies drove sharp gains in the neo-cloud sector, with notable jumps in CoroWeb and Nebius Group shares. Super Micro also surged after a strong revenue outlook and record order backlog. The Roundhill Neo-Cloud ETF jumped over 17%, with all 14 holdings trading higher. The semiconductor sector also performed well, with the Philadelphia SOX index rising about 2%, supported by Goldman Sachs upgrades for Dell Technologies, NetApp, and HPE. Cisco Systems reported record Q4 fiscal results, with revenues up 18% to $17.3 billion and an aggressive 2027 revenue forecast of up to $73.4 billion, including $7.5 billion from AI infrastructure, though its stock fell about 4% in after-hours trading.

In Israel, mixed trends prevailed with Riskified and Brainsway rising on strong reports, while Alpha Tau Medical, Naix, eToro, and Playtika Holdings declined. Dual-listed stocks on the Tel Aviv Stock Exchange showed a positive arbitrage gap of 0.63%, led by gains in Brainsway, Camtek, and Gilat. The TA-35 index rose 1.1%, driven by tech stocks and strong earnings from Bank Leumi, which posted an 8.5% net profit increase to 2.83 billion shekels. However, the construction index fell 2.4%, marking its worst month since March 2025 amid reports that over 4% of new home transactions in 2023 were canceled due to buyer affordability issues.

Oil prices declined amid concerns over supply disruptions following a massive oil spill off Oman’s coast from a sanctioned tanker carrying 800,000 barrels of Russian oil, threatening a marine reserve. Additional deadly attacks on vessels in the Gulf of Oman and Red Sea increased market volatility despite the International Energy Agency’s forecast of lower global oil demand this year. The U.S. dollar remained stable against the shekel near 2.9836, supported by mixed monetary policy expectations between the Federal Reserve and the European Central Bank.

Market strategists remain cautiously optimistic about equities, supported by strong earnings and ongoing AI investments globally. UBS Global Wealth Management’s Chief Investment Officer Mark Haefele recommends diversifying portfolios by reallocating some U.S. tech exposure to Europe, Asia, and select cyclical sectors. However, concerns persist over high interest rates, stretched valuations, and a wave of AI-related IPOs, which could temper future returns. Analysts note that despite earnings beats, stock price reactions have been muted, reflecting investor caution amid a complex macroeconomic backdrop.