ANET — Nov 195/145 put spread
Ciena beat on Sept 3 with record revenue up 37% and adjusted EPS up 215%, then fell 9.7% that session because management guided sequential gross and operating margin compression. Arista edged higher the same day. Arista goes into its Nov 2 print at 79% of its 52-week range with IV percentile at 10.5, which means the chain has repriced neither the peer margin signal nor the hyperscaler concentration our catalyst watch flags. The 195/145 costs 32% of width to own that gap.
- Ticker: ANET
- Direction: Bearish
- Risk profile: earnings
- Confidence: medium
- Catalyst: Q3 2026 earnings (AMC) (2026-11-02)
- Cohort: 2026-09-06
- Expires: 2026-09-13
- Max loss: $15.79
- Max gain: $34.21
Structure
- long put 195 2026-11-20
- short put 145 2026-11-20
Signals
- Peer guide-down: CIEN -9.7% Sep 3 on sequential margin compression guide despite +37% revenue (web_search)
- Relative positioning: ANET at 79% of 52w range vs CIEN at 39.2% (DB)
- Catalyst watch: Hyperscaler concentration; 800G ramp (DB)
- IV percentile (52w): 10.5 — puts near the cheapest of the year (DB)
What invalidates this thesis
Arista's margin structure is switching silicon, not the optical component line Ciena guided down, so the read-through may simply not apply. Our own project table links 3,895 MW of OpenAI and 3,372 MW of Meta capacity to Arista, and a Nov 2 beat-and-raise on hyperscaler orders invalidates the whole setup.