Layer 0 · ANET — Arista Networks
Thesis
The cleanest pure-play on back-end AI Ethernet — Meta, Microsoft, Oracle migrating from InfiniBand to 800G/1.6T Ethernet fabrics. Tier B not Tier A because a -16% post-print sell-off ($170 to $142) told us the crowd is now selling rallies on hyperscaler-timing fears, even as the print itself was a clean double-beat.
What it does + financial print
Arista builds the high-radix data-centre switches that knit together AI clusters — Tomahawk-5 and Jericho3 silicon, EOS software, Etherlink for back-end RoCE. The competitive race is binary: either AI back-ends standardise on Ethernet or NVDA's Spectrum-X eats the fabric. Right now both vendors win, but Arista is the share-leader inside the Magnificent-Seven hyperscaler footprint.
Q1 2026 printed $2.71B revenue versus $2.66B consensus — a +35% YoY beat — and $0.87 EPS versus $0.79 (+10%). The guide was technically in-line but management leaned cautious on hyperscaler timing, which is what drove the -16% reaction. Sell-side average PT sits at $182 (FX Leaders, 25-35% upside). The fundamentals are fine; the tape is suspicious.
Bull case
A Meta/MSFT 800G order acceleration in H2 — even one disclosed mega-PO — flushes the digestion fear and rerates the multiple back toward the $170-180 zone. Add Oracle, xAI and the sovereign deals (KSA, UAE) ramping their own Ethernet back-ends and you have the same revenue trajectory ANET had through 2025 but on a wider customer base.
Gap / bear case
Two bears co-exist: AVGO's Tomahawk-6 silicon means more hyperscalers can build their own switches and skip Arista's premium box; NVDA's Spectrum-X bundles networking with GPUs and is the path-of-least-resistance for Tier-2 buyers. Until ANET prints a quarter where front-end + back-end Ethernet wins are both visible, the multiple stays capped.
Trigger to upgrade / downgrade
Upgrade to Tier A on a clean $130 reset that holds (the $130 zone is the prior gap-fill and 200-day moving average) — or on the next print if back-end AI Ethernet revenue is explicitly disclosed at >$1B annualised. Downgrade to C only if a hyperscaler publicly defects to Spectrum-X for a tier-1 cluster.
The trade
- Entry zone: $128-132 on pullback (gap fill); chase only above $158
- Stop: $118 close (2×ATR below entry, breaks 200-day)
- Position size: 1.5% of NLV starter, 3% full
- Catalyst date: Q2 print August 5 2026; hyperscaler Computex-style commentary mid-summer
- Conviction: 7/10