Asian stock markets posted broad gains on Wednesday, led by technology shares after Google parent Alphabet unveiled plans to invest $75bn in artificial intelligence infrastructure over the next year. The announcement, which exceeded analyst expectations, reignited investor enthusiasm for AI-driven growth and lifted regional benchmarks despite a concurrent rally in crude oil that tempered overall enthusiasm.
Japan's Nikkei 225 closed 1.2% higher at 39,845, with semiconductor-related stocks such as Tokyo Electron and Advantest among the biggest gainers. Hong Kong's Hang Seng index rose 0.8% to 17,634, while South Korea's Kospi added 1.1%. The moves followed a strong session on Wall Street, where the Nasdaq Composite climbed 1.6% on Tuesday after Alphabet's capital expenditure commitment.
Oil prices, however, remained a drag on sentiment. Brent crude futures settled above $85 a barrel for the first time since April, driven by production cuts from OPEC+ and rising geopolitical tensions in the Middle East. The rally in energy costs poses a challenge for central banks, including the Bank of England, which is grappling with stubbornly high services inflation. Higher oil prices typically feed through to petrol and heating bills, dampening consumer spending power.
For UK investors, the divergence between tech optimism and energy-driven inflation creates a complex backdrop. The FTSE 100, which is heavily weighted towards oil majors such as BP and Shell, could benefit from higher crude prices, but the broader economy may suffer if the Bank of England is forced to keep interest rates higher for longer. The FTSE 250, more exposed to domestic consumer spending, is particularly sensitive to such pressures.
Analysts at AJ Bell noted that while Alphabet's spending boost is positive for global tech, the sustainability of the AI rally depends on earnings delivery. 'Investors are betting big on AI, but the real test will come when companies have to show returns on that capital,' said Russ Mould, investment director. Meanwhile, oil markets remain volatile, with any further supply disruption likely to weigh on equity gains.