Up until the weekend, global markets had been betting on a fragile ceasefire between the U.S. and Iran turning into a longer-term peace deal.

But escalatory rhetoric, action over the Strait of Hormuz, and fresh Iranian attacks on the United Arab Emirates over the past 48 hours, have led experts to warn war could be back.

Market analysts said the latest developments could mark an inflection point in the war and a critical moment for financial markets and global energy supplies, which are dwindling as the Strait of Hormuz remains largely closed.

“It’s an incredibly delicate moment,” Ben Powell, chief investment strategist for APAC at BlackRock, told CNBC Tuesday.

“It’s very unsettling to have our first missile warnings here in Abu Dhabi for several weeks. We were all hoping that was behind us,” the UAE-based strategist said.

“Looking forward, I think there is a genuine complexity as to whether this escalation yesterday was just part of the negotiation — Iran showing that they’ve still got cards to play, perhaps signaling to the UAE that the UAE can leave the OPEC, but energy leaving the region is still dependent on the favor from Iran — or it could be a beginning of a more difficult moment,” he told CNBC’s “Access Middle East.”

Energy and other key parts of the global economy aren’t flowing, he said, adding that it now feels like we’re approaching a “critical moment” where inventories have been run down, and the delayed impact of the energy shock is starting to come into sharper focus.

Global markets were edgy Tuesday morning after the latest developments in the Middle East at the weekend, which saw the U.S. try to end a stalemate over the blockaded Strait of Hormuz by launching “Project Freedom,” essentially, a bid to “free” stranded ships in the strait and to safely escort them out of the waterway, which has been blockaded by both Iran and the U.S.

Those attempts were met with Iranian resistance, with the U.S. saying it had sunk several Iranian boats as a result of skirmishes in the channel, although Iran denied any of its boats had been sunk.

Iran later attacked oil infrastructure in the UAE with missiles and drones, seemingly resuming a strategy of lashing out against its Middle East neighbors to get them to pressure the U.S. to end the war.

Financial markets were a mixed bag on Tuesday, with bourses lower in Asia and mixed in Europe, while U.S. stock futures moved higher ahead of the forthcoming session on Wall Street.

That apparent bounceback in the U.S. comes after the major averages suffered declines on Monday and oil prices rose amid growing concerns that the conflict in the Middle East could resume with a vengeance.

Markets are likely to remain on tenterhooks as they wait to see what happens next, with geopolitical watchers now warning that a complete collapse of the already tentative U.S.-Iran ceasefire is looking increasingly likely.

“The question of the week is whether geopolitical risks will remain messy but contained, or break through to weigh on markets and corporate earnings,” Tina Fordham, founder of Fordham Global Foresight, commented in analysis Tuesday.

“Judging by the apparent resumption today of Iranian attacks on targets in the UAE itself and on ships attempting to pass through the Strait of Hormuz, I’m currently leaning toward the latter,” she warned.

Describing the apparent resumption of Iranian drone and missile attacks against the UAE as “the biggest escalation in some weeks,” she said Tehran had shown the U.S. that it still has fight left in it, peace deal or none.

“Iran is signalling that they still have the capacity to inflict pain and won’t be forced into capitulation. The U.S. increasingly faces a choice between a long war it doesn’t want to fight, or a bad, embarrassing deal,” Fordham noted in emailed comments.

The latest turn in events in the Iran war appears to have been precipitated by the U.S.’ ‘Project Freedom’ strategy, announced on Sunday, aimed at forcing a reopening of the Strait of Hormuz. The move came after the White House appeared to have grown frustrated at an impasse over a peace deal with Iran. Pakistan-mediated talks have stalled in recent weeks, and both sides are at odds over an agreement.

U.S. President Donald Trump told Fox News Monday that Iran would be “blown off the face of the earth” if it targeted U.S. ships that are protecting commercial vessels transiting the strait.

Tehran signaled overnight that it is still interested in Pakistan-mediated peace talks with the U.S. and warned that a political solution was the only way to break the deadlock over a deal.

“As talks are making progress with Pakistan’s gracious effort, the U.S. should be wary of being dragged back into quagmire by ill-wishers. So should the UAE. Project Freedom is Project Deadlock,” Iran’s Foreign Minister Abbas Araghchi commented on X overnight.

He said the latest developments in the war “make clear that there’s no military solution to a political crisis.”

Artificial intelligence chipmaker Cerebras aims to raise as much as $3.5 billion by going public on the Nasdaq.

The company is looking to sell 28 million shares, for $115 to $125 each, according to an updated prospectus it filed on Monday.

At that range, Cerebras could be worth up to $26.6 billion in the initial public offering, based on shares outstanding. In February, the company announced a venture round that gave it a $23 billion valuation, with Advanced Micro Devices among its investors.

Relatively few technology companies have gone public since central banks raised interest rates in 2022 to fight rising prices, making investors less interested in unprofitable names.

But with the ascent of generative AI products such as OpenAI‘s ChatGPT, investors have become rabid about betting on companies that benefit from the trend. Money-losing Cerebras competitor CoreWeave, which rents out Nvidia graphics processing units as a cloud service, raised $1.5 billion in an IPO last year. Cerebras’ chips are an alternative to Nvidia’s popular GPUs.

Cerebras sought to go public in 2024 but later withdrew the paperwork, as its business model was shifting away from selling hardware and toward operating a cloud service based on its own chips. In April, Cerebras filed for an IPO for a second time.

In January, Cerebras said it would provide up to 750 megawatts of AI computing power to OpenAI through 2028 in a transaction worth over $20 billion.

The company’s fourth-quarter revenue grew about 76% year over year to $510 million, and it showed $87.9 million in net income for the period.

Andrew Feldman, Cerebras’ co-founder and CEO, is not selling shares in the IPO. He will own 10.3 million shares after the IPO that would be worth up to $1.28 billion at the high end of the range, according to the filing.

The company has an option to sell an additional 4.2 million shares to underwriters after the IPO that would yield another $525 million in proceeds at the high end of the range.

WATCH: OpenAI unveils first AI model running on Cerebras chips