Global chip selloff wipes out over $1 trillion as custom AI silicon challenges Nvidia

Overview

Chip stocks lost more than $1 trillion in market value on July 28, 2026. Memory maker SK Hynix fell about 14% and Samsung dropped over 10%, pulling South Korea's Kospi down roughly 9%. Nvidia slid more than 5% and briefly handed the title of world's most valuable company back to Apple.

The trigger is a change in who designs AI chips. OpenAI, Amazon, and Cerebras are now shipping their own custom silicon instead of buying every chip from Nvidia. Investors read that as the start of a lasting shift, and repriced about a year of AI-hardware optimism in a single session.

Why it matters

If custom chips keep displacing Nvidia, cloud giants' AI bills fall, and so do the chip stocks sitting in most retirement funds.

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Key Indicators

$1T+

Market value erased

Combined loss across global chip stocks on July 28, 2026.

-14%

SK Hynix single-day drop

The Nvidia memory supplier led Asia's losses.

-9%

Kospi index drop

South Korea's benchmark fell as Samsung and SK Hynix sank.

-5%

Nvidia single-day drop

Enough to briefly cede most-valuable-company status to Apple.

10 GW

OpenAI–Broadcom chip plan

Custom accelerators OpenAI plans to deploy through 2029, bypassing Nvidia.

Voices

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People Involved

Jensen Huang

Defending Nvidia's lead as big customers build rival chips

Sam Altman

Diversifying OpenAI's chip supply away from Nvidia alone

Andrew Feldman

Positioning wafer-scale chips as a GPU alternative for inference

Organizations Involved

Nvidia Corporation

Semiconductor company

Dominant AI chip supplier now facing in-house rivals

Nvidia's graphics processors are the default hardware for building and running AI models.

Amazon Web Services (AWS)

Cloud computing division

Shipping custom Trainium chips in volume

Amazon's cloud arm designs its own Trainium AI chips to cut its reliance on Nvidia.

SK Hynix

Memory manufacturer

Hardest-hit stock in the July 28 selloff

SK Hynix makes the high-bandwidth memory that sits alongside AI processors.

Timeline

January 2026 July 2026

6 events Latest: July 28th, 2026 · 1 week ago

Tap a bar to jump to that date

July 2026
Global chip selloff erases over $1 trillion
Latest Market

SK Hynix drops about 14% and Samsung over 10%; Nvidia falls 5% and briefly loses the top-company title to Apple.
July 28th, 2026
Cerebras says its new chip will fight GPUs
Statement

Cerebras announces a chip built to compete directly with GPU architectures, sharpening the challenge to Nvidia.
July 8th, 2026
First tremor hits Asian chip stocks
Market

Samsung and SK Hynix fall over 9% as a Wall Street chip selloff spreads to Asia, an early sign of nerves.
July 2nd, 2026
June 2026
OpenAI unveils Jalapeño chip with Broadcom
Product

OpenAI reveals its first custom inference chip, designed with Broadcom, with initial deployment targeted for late 2026.
June 24th, 2026
May 2026
Amazon Trainium3 ships in volume
Product

AWS begins volume shipments of its custom Trainium3 chip, offered as a lower-cost alternative to Nvidia hardware.
May 1st, 2026
January 2026
OpenAI adds Cerebras to its chip roster
Deal

OpenAI signs a chip agreement with Cerebras, widening its supply beyond Nvidia, AMD, and Broadcom.
January 16th, 2026

Historical Context

3 moments from history that rhyme with this story — and how they unfolded.

March 2000

Cisco loses its dot-com crown (2000)

In March 2000, Cisco passed Microsoft to become the world's most valuable company at about $500 billion. It made the routers and switches that built the early internet, the picks-and-shovels of that boom. Then demand assumptions broke.

Then

Cisco shares fell roughly 88% over the next two years, from about $79 to $9.50.

Now

The stock did not pass its 2000 peak again until late 2025, even as the company stayed profitable and large.

Why this matters now

Like Nvidia, Cisco was the dominant supplier priced for endless growth. The parallel shows how fast a hardware leader reprices when buyers' spending plans shift.

June 2020

Apple drops Intel for its own chips (2020)

Apple announced it would stop buying Intel processors for Macs and use chips it designed itself, built by TSMC. A major customer chose to build rather than buy. The first Apple-designed Macs shipped later that year.

Then

Apple's chips beat Intel's on speed and battery life, and Apple stopped being an Intel customer for Macs.

Now

Intel lost the Mac business permanently and spent years trying to regain lost ground in chip performance.

Why this matters now

This is the exact mechanism now hitting Nvidia: a big buyer designs its own silicon and stops writing checks to the incumbent. It shows the threat can be real and lasting.

January 2025

The DeepSeek selloff (January 2025)

A cheaper AI model from Chinese startup DeepSeek raised fears that companies could build strong AI with far less chip spending. Nvidia fell about 17% in one session, near $600 billion, the largest single-day loss for any company at the time.

Then

Nvidia's stock recovered much of the drop within weeks as buyers kept ordering chips.

Now

The episode showed how sensitive Nvidia's value is to any hint that AI hardware demand could soften.

Why this matters now

The July 2026 selloff rhymes with this: a demand-side worry, not a bad Nvidia result, wiping out huge value fast. It also shows such drops can reverse quickly.