CNBC Daily Open: What happened to the $20 billion?

A pop-up shop for "dots" a personal assistant agent at the OpenAI developers conference allows attendees to design stickers of their agents at Fort Mason on Sept. 29, 2026 in San Francisco, California. Heather Diehl | Getty ImagesHello, this is Leonie Kidd coming to you from London. Welcome to another edition of CNBC's Daily Open.When you are justifying a valuation of over $850 billion, every metric matters.OpenAI's latest annual revenue estimate, confirmed by CNBC, has spooked investors by falling short of previous statements, and the market has taken it out on technology stocks. Read on for more.What you need to know todayA $20 billion differential from month-to-month is bound to draw negative attention. OpenAI has told investors that annualized revenue hit $50 billion at the end of September, in a statement confirmed by CNBC. That falls significantly short of the $68 billion figure widely reported last month. First revealed by the Financial Times, the discrepancy spooked investors, who flocked to sell AI stocks from Nvidia to Oracle to CoreWeave. It comes at a sensitive time for OpenAI. CEO Sam Altman has confirmed the group will not try to IPO this year, but the company is still looking to justify a valuation that tops $850 billion. You can watch CNBC's full interview with Altman and CNBC's Kate Rooney from the group's DevDay last week here. For now, futures are bouncing back from Thursday's declines, with all three major markets set to open higher on Friday. Public problemsMeanwhile, Anthropic is reportedly seeking a $2 trillion valuation in its upcoming listing on the Nasdaq. In a recent note, research firm New Constructs described it as "the most ridiculous IPO of 2026," adding that it "presents far bigger risks and is positioned to be a far bigger rip-off of U.S. capital markets." In other IPO news, a Nvidia-backed AI group in Australia, Firmus, has withdrawn its IPO, citing market volatility. It would have been the second-largest new share sale in Australia's history.Iran on holdOil prices are retreating on Friday, following a steep drop on Thursday, after U.S. President Donald Trump said that America will not attack Iran before the midterm elections. Earlier in the week, his comments about renewed strikes had driven Brent back above $104 a barrel. Saudi travel disruptionsAn escalation in Houthi attacks on Saudi Arabia's capital Riyadh has prompted flight cancellations and disruption to workplaces and schools. Yemen's Iran-backed group claimed to fire missiles at the Saudi capital's airport, and threatened to shut Saudi airspace. CNBC is continuing to monitor the situation, which now looks set to impact two major events due to take place in Riyadh over the coming weeks. — Leonie KiddAnd Finally...