IBM’s AI Regulatory Warning and Q2 Earnings Miss Send Shockwaves Through Tech Sector

‘Mornings with Maria’ host Maria Bartiromo analyzes IBM’s latest stock projections and potential impact on the U.S. markets.

Shares of IBM declined more than 23% following the market open on Tuesday, as investors questioned the near-term returns expected from artificial intelligence expenditures.

The drop marked the worst trading day for IBM in decades, with second-quarter earnings showing both profit and revenue falling short of analyst forecasts.

In an investor letter on Tuesday, CEO Arvind Krishna attributed IBM’s underperformance to its Z mainframe business — large-scale enterprise computing systems equipped with advanced AI capabilities — failing to meet the company’s projections. The flagship product, the z17, is marketed as a “transaction processing powerhouse.”

“Given this was the strongest start to our mainframe program in history, we anticipated low-single-digit Infrastructure revenue decline for the year, beginning this quarter,” Krishna wrote. “What occurred was worse than expected, primarily due to shortfalls in our Z performance and the associated software stack, especially in Transaction Processing.”

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IBM CEO Arvind Krishna attends an event in the Rose Garden of the White House in Washington, D.C., on July 6, 2026. (Mandel Ngan/AFP via Getty Images)

The IBM z17 is a mainframe system designed to detect fraud in real-time during credit card transactions. According to IBM, “Every time you swipe your credit card, check your bank balance, make a stock transaction or use an ATM, that transaction is likely running through an IBM Z. With AI embedded directly on the platform, IBM’s z17… enables clients to detect fraud in real time without moving their data,” the company states on its website.

Krishna explained that the shortfall stemmed from clients redirecting capital expenditure toward hardware to secure infrastructure amid supply constraints and anticipated price increases.

The IBM Watson IoT Center is located in the Highlight Towers in Munich, Germany, on May 22, 2026. (Michael Nguyen/NurPhoto via Getty Images)

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“In the final weeks of June, we observed clients redirecting quarterly capital expenditure toward servers, storage, and memory purchases to secure supply-constrained infrastructure ahead of expected price hikes,” Krishna wrote.

“While we anticipated some supply-chain-related impacts, the scale of capex reprioritization exceeded our expectations,” he continued.

IBM reported adjusted earnings of $2.93 per share on $17.2 billion in revenue, missing Wall Street estimates of $3.01 per share and $17.86 billion, respectively, according to CNBC.

In this photo illustration, the IBM logo is seen displayed on a smartphone. (Mateusz Slodkowski/SOPA Images/LightRocket via Getty Images)

Bartiromo highlighted IBM’s decline as a catalyst for broader market volatility, noting, “The biggest drag on the Dow Industrials this morning is IBM. This is the worst day so far that we’ve ever seen for IBM. This unexpected warning sent a shockwave through the tech sector, causing software names to sell off—ServiceNow, Salesforce, Microsoft, all down.” Other tech firms including Arm Holdings, Oracle, and Apple also experienced declines.

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