Arista Networks (ANET) is down about 4.95% today to $163.52 as traders reduce exposure into a catalyst-heavy stretch for AI and networking spending signals. The market is focusing on April 29 earnings from major Arista customers Microsoft and Meta—read-through events for data-center networking order pace—followed by Arista’s own Q1 2026 results on May 5.

Adding to pressure, investor attention has swung back toward competitive risk in AI data-center switching. Recent analyst commentary has highlighted Nvidia’s push into high-speed switching as a potential headwind that could cap Arista’s near-term upside if customers adopt alternative architectures or accelerate purchases away from traditional Ethernet roadmaps.

Arista has a concentrated customer base in large cloud and AI infrastructure, so the stock often trades on expectations for hyperscaler capex and deployment timelines rather than company headlines. With valuation-sensitive positioning into earnings, even modest shifts in expectations—or simple pre-event risk reduction—can translate into outsized daily moves in the shares.