Broadcom Investors Weigh a Google Puzzle: Diversification or Displacement?

Broadcom shares slide 14% amid Marvell-Google custom AI chip deal, raising questions about its TPU stronghold and investor nerves over AI valuations.

The arithmetic of Broadcom's summer slide is stark enough on its own. The stock has shed roughly 14 percent over the past week, with Wednesday's session in Frankfurt adding another 5.8 percent drop to €309.00. But the trigger for the latest leg lower came from outside the company entirely — and the market's verdict on that news may say more about investor nerves than about Broadcom's actual standing.

The catalyst: Marvell Technology has struck a deal with Google that includes a warrant for up to 58.97 million Marvell shares at $206.58 each, a package valued at roughly $12.18 billion. In exchange, Marvell will assist in developing custom chips for Google spanning AI inference accelerators, memory and networking technology, and near-memory computing. The option is tied to future chip purchases running through 2033.

Traders read the arrangement as a direct challenge to Broadcom's lucrative custom AI chip business with Google — the search giant's Tensor Processing Units (TPUs) have long been a Broadcom stronghold. Marvell shares surged more than 11 percent in premarket trading on the news, while Broadcom slid between 3 and 5 percent on Wall Street. In Frankfurt, the decline was steeper, with the stock touching €309.00 after already giving ground from €328.05 the prior day.

A Deeper Context Behind the Sell-Off

Friday's session had already set a grim tone. Reuters reported a 5.9 percent drop as investors broadly questioned elevated AI-sector valuations and turned more risk-averse. Over 30 days, the stock is now down 6.0 percent, and it sits 8.5 percent below its 50-day moving average. The distance from the 52-week high of €429.60 — reached as recently as June — stands at roughly 28 percent. The relative strength index reads 33.6, a level technicians describe as oversold, though that metric deserves only passing attention rather than being treated as a buy signal.

Institutional positioning tells a more nuanced story. Tiger Global Management cut its Broadcom stake by about 51 percent in the second quarter, reducing it to 1.75 million shares, according to Reuters. Stanley Druckenmiller's Duquesne Family Office went further, exiting its Broadcom position entirely during the same period, alongside stakes in Micron, Intel, and Lattice Semiconductor. Broader 13F filings show institutional investors trimming both Nvidia and Broadcom while rotating toward infrastructure and memory names.

The Core Question: Shrinking Pie or Growing One?

Whether Marvell displaces Broadcom at Google or simply benefits from an expanding pool of custom chip spending is the central tension driving the current move. Broadcom signed a long-term agreement with Google in April covering custom AI chips through 2031 — a foundation investors had largely treated as secure. The Marvell deal reveals that Google is deliberately building out a multi-supplier strategy, and reports from Taiwan suggest AMD is also working on the next generation of Google's TPUs.

The bearish interpretation is straightforward: Google may be shifting AI chip work in-house or spreading it across more partners, which would erode the valuation premium attached to Broadcom's custom silicon business. The bullish counterargument holds that hyperscalers routinely diversify critical infrastructure suppliers, and the overall AI pie is growing fast enough to accommodate multiple vendors. Dell'Oro Group projects worldwide data center investment exceeding $3 trillion by 2030.

Fundamentals Versus Chart Damage

Operationally, Broadcom's numbers remain robust even as the stock stumbles. AI semiconductor revenue jumped 143 percent in the second quarter to $10.8 billion, with the company guiding to $16 billion for the third quarter. TD Cowen analyst Joshua Buchalter reaffirmed a buy rating with a $500 price target on Tuesday, citing expectations for AI revenue exceeding $100 billion by fiscal 2027. Nova Capital sees further upside with a $585.90 target, and JPMorgan sits at $580. Wall Street's consensus remains firmly positive: 23 buy ratings against just 3 holds, with an average price target of $515.61.

The financing pipeline adds another layer of support. Apollo and Blackstone are reportedly backing a $35 billion expansion of AI computing capacity for Anthropic, built on Broadcom's custom chips and networking solutions. BofA analyst Tom Curcuruto estimated on August 14 that Broadcom's chip financing vehicle could grow to $370 billion in senior debt by mid-2029 to fund 20 gigawatts of computing power — implying roughly $150 billion in new issuance for 2027 alone.

Legal and Macro Headwinds

Not everything points in Broadcom's favor. The company lost a bid in early August to suspend an EU antitrust inquiry seeking US legal documents related to its 2023 VMware acquisition. The matter isn't an immediate catalyst, but it serves as a reminder that regulatory risks linger in the background.

The macro environment has turned less accommodating as well. Yields on 30-year US Treasuries reached their highest level since 2007, oil prices firmed, and semiconductor names across the board — from Nvidia to Intel to Micron — came under pressure. That broader risk-off tone complicates any read on Broadcom's recent slide, blurring the line between company-specific concerns and sector-wide repositioning.

What Comes Next

The next concrete test arrives within days: Marvell's quarterly report on August 27 should offer early evidence of how substantially its Google custom chip business is ramping — and therefore how serious the competitive threat to Broadcom truly is. Until then, the stock's path below its 50-day average of €339.62 looks more like a pause than a confirmed reversal, provided Broadcom's existing Google agreement through 2031 holds and the third-quarter AI revenue guidance of $16 billion is confirmed.

The summer's real question isn't whether Google will keep investing in custom silicon — that much is settled. It's whether Broadcom's slice of that spending shrinks as the customer builds a broader supplier base. Wednesday's sell-off reflects the market pricing the worst-case scenario rather than the confirmed outcome. The gap between institutional de-risking and the company's operational momentum remains the central tension for shareholders watching the stock trade nearly a third below its June peak.