Global stocks rallied on Tuesday, buoyed by fresh artificial intelligence (AI) optimism after Anthropic moved towards a US stock market listing, while oil prices and bond yields fell on renewed hopes of a US-Iran deal.

Brent crude futures dropped more than 1% below US$94 (RM372.73) a barrel, paring the previous session’s sharp gains, after US President Donald Trump said talks with Iran continued.

His comments came despite a report that Tehran had suspended indirect negotiations with Washington to end hostilities, keeping investors cautious about efforts to end the three-month war and underlining the fragility of an ongoing ceasefire.

Europe’s STOXX 600 was up 0.7% by midday, as a strong forecast from chipmaker STMicroelectronics lifted technology stocks.

Anthropic said on Monday it had confidentially filed for a US initial public offering, edging ahead of rival OpenAI in a closely watched race to reach public markets. Google parent Alphabet is also seeking to raise US$80 billion in equity to fund the expansion of its AI infrastructure.

“This speaks to the huge sums involved in keeping pace in the AI arms race. It represents a significant shift from a period of bumper free cash flow to going cap in hand to the markets to help fund its expansion,” Russ Mould, an investment director at AJ Bell, said.

On the economic front, the Institute for Supply Management on Monday said the US manufacturing purchasing managers index rose to 54.0 in May from 52.7 the previous month, beating expectations to hit a four-year high, likely driven by firms front-loading orders amid rising prices and supply concerns linked to the Iran war.

Futures on the S&P 500 and Nasdaq 100 were down around 0.1% to 0.2%, pointing to a slightly weaker open after both indices posted an eighth straight gain and fresh record highs on Monday.

“That marks the first time in a year the S&P has achieved eight consecutive daily gains. And if you look at the moves on a weekly basis, a positive gain this week would be the S&P’s 10th consecutive advance, which is something we haven’t seen since 1985,” Deutsche Bank strategist Jim Reid said.

In Taipei, Nvidia chief executive officer Jensen Huang said the company had enough supply to support strong growth in central processing units (CPUs) and graphics processing units (GPUs), but acknowledged supply constraints remained a concern.

South Korean equities were volatile, with the benchmark Kospi swinging sharply lower after hitting a record high as bellwethers, such as Samsung Electronics and SK Hynix, seesawed.

In currency markets, the dollar edged slightly lower. The euro, still 1.5% below its level at the start of the war, was last up 0.1% on the day at US$1.1646.

Data showed eurozone core inflation at 2.5% year-on-year in May, above expectations of 2.4% and April’s 2.1%. Money markets price in a quarter-point European Central Bank rate hike this month, with at least one more by year end.