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Fund managers fretting over Corporate America’s “overinvestment” are only worried about one thing

Being concerned about “overinvestment” is really a very narrow statement about worries over hyperscalers’ ROI.

Luke Kawa

Big Tech capex makes the world go ’round.

In the US, the enduring AI build-out is responsible for fueling some explosive gainers, namely in memory chip and semicap stocks.

But these hot pockets of the market would be at risk if Big Tech CEOs listened to what CIOs want them to do: spend less.

“Capex too hot right now... CIOs telling CEOs to improve balance sheets (35% from 26%) vs. increase capex (20% from 34%) as FMS investors saying corps ‘overinvesting’ at new record high,” Bank of America Chief Investment Strategist Michael Hartnett wrote of the results of the latest BofA fund manager survey.

BofA Capex Overinvestment

Being concerned about “overinvestment” is really a very narrow statement about worries over hyperscalers’ ROI.

At the S&P sector level, there is no broad-based capex boom: communication services, technology, and consumer discretionary (home to the Magnificent 7) are in a league of their own when it comes to boosting capex over the past five years.

While an AI bubble is still deemed to be the biggest tail risk, the share of investors judging this to be the case has winnowed significantly in recent months — along with the deflation in valuations for Big Tech’s big spenders.

BofA Biggest tail risk feb 2026


Cash levels rose to 3.4% for February, “up from the record low of 3.2% in January, the first rise in 7 months,” per BofA, even as investors boosted risk-on positioning by going more overweight on equities as well as commodities and underweight on bonds.

This elevated positioning is one reason why the S&P 500 has struggled to make gains in 2026.

“Fund manager survey sentiment stays uber-bullish… asset price upside in Q1 harder when all positioned for it,” Hartnett wrote.

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Samsung’s massive Q1 fails to lift Sandisk, other data center plays

Almost all memory stocks slipped Tuesday, despite getting a positive update on the massive flood of money pouring into the sector from the AI build-out, as the potential escalation of the US war with Iran Tuesday evening overshadowed Samsung’s blowout numbers.

Korean chip giant Samsung Electronics reported preliminary Q1 results showing operating profit up by 755% compared to Q1 2025, trouncing pretty elevated expectations for a gain of about 550%.

Samsung is the world’s largest producer of NAND and DRAM chips. Once considered low-value commodity inputs to tech products, NAND and DRAM prices have exploded over the last six months amid a hyperscaler scramble to secure chips that can manage the surfeit of data produced by AI.

The same dynamics have made memory plays like Sandisk, Western Digital, and Micron some of the best-performing stocks in the S&P 500 over the last 12 months.

But other than Seagate Technology Holdings, those stocks were down Tuesday as of 11:15 a.m. ET, as the surge in oil prices and ongoing war with Iran muted much of the AI data center trade excitement. Bellwethers like Nvidia and hyperscalers like Oracle and Meta were struggling early, as were data center input makers like Corning and Coherent, AI power plays like GE Vernova, Vertiv Holdings, and even hard-hat builders of the shells that house all those AI servers.

On the other hand, some so-called optical stocks — makers of fiber-optic connections that quickly shift data between users, hyperscalers, and all around data centers themselves — were up. Lumentum and Arista Networks, two popular optical stocks, were showing resilience.

Samsung is the world’s largest producer of NAND and DRAM chips. Once considered low-value commodity inputs to tech products, NAND and DRAM prices have exploded over the last six months amid a hyperscaler scramble to secure chips that can manage the surfeit of data produced by AI.

The same dynamics have made memory plays like Sandisk, Western Digital, and Micron some of the best-performing stocks in the S&P 500 over the last 12 months.

But other than Seagate Technology Holdings, those stocks were down Tuesday as of 11:15 a.m. ET, as the surge in oil prices and ongoing war with Iran muted much of the AI data center trade excitement. Bellwethers like Nvidia and hyperscalers like Oracle and Meta were struggling early, as were data center input makers like Corning and Coherent, AI power plays like GE Vernova, Vertiv Holdings, and even hard-hat builders of the shells that house all those AI servers.

On the other hand, some so-called optical stocks — makers of fiber-optic connections that quickly shift data between users, hyperscalers, and all around data centers themselves — were up. Lumentum and Arista Networks, two popular optical stocks, were showing resilience.

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