### The move

CNBC reports **Nvidia** shares fell nearly **3%** while **AMD** gained close to **1%** after comments from **Arista Networks CEO Jayshree Ullal** on the company’s earnings call.

Ullal said that where deployments were previously “pretty much 99% Nvidia,” Arista now sees roughly **20% to 25%** where **AMD is becoming the preferred accelerator**.

### Why it matters for stock markets

The AI infrastructure trade has been a major driver of U.S. equity performance, and investors are highly sensitive to:

- Evidence of **share shifts** in the accelerator market

- Changes in **hyperscaler spending** and architecture choices

- The “picks-and-shovels” ecosystem (networking, switches, and interconnect)

CNBC also notes Arista’s role as an Ethernet switching provider connecting AI clusters, and points out that Nvidia has been expanding its own networking stack—raising competitive and demand questions for suppliers.

### What to watch

- Additional datapoints from hyperscalers on mix (Nvidia vs AMD vs in-house silicon)

- Upcoming earnings and guidance from Nvidia, AMD, and AI networking vendors

- Whether this is a one-off commentary or a broader deployment trend

_Source: CNBC (link above)._