US stock market hits all-time high as investors bet big on AI

The US stock market reached an all-time high, with the benchmark S&P 500 index now up 14 percent for the year, as investors continue to pour money into companies tied to artificial intelligence.

The rally has come despite headwinds that might otherwise have weighed on markets, including elevated oil prices and a sell-off in US government debt. Rising bond yields typically make borrowing more expensive and can dampen enthusiasm for riskier assets such as stocks, yet equities have continued to climb.

AI optimism driving gains

Much of the market's strength has been attributed to sustained investor enthusiasm for artificial intelligence, with technology companies at the center of AI development and infrastructure build-out drawing significant inflows. This pattern has mirrored broader market trends over the past couple of years, as AI has emerged as a dominant theme shaping investor sentiment.

Some analysts have cautioned that heavy concentration of gains in AI-related stocks raises questions about how broad-based the rally truly is, and whether valuations in parts of the technology sector have outpaced underlying earnings growth. Others point to the scale of corporate investment in AI infrastructure as justification for continued optimism.

The combination of record stock prices alongside elevated oil prices and pressure in the bond market underscores a US economy sending mixed signals, even as equity investors remain focused on the long-term potential of AI-driven growth.