ANET·Arista Networks Inc

Realized volatility (21d)

31.0% 29th pct

Below its peak

-6.1%

vs 200-day average

+26.4%

Up days (1y)

54%

Arista Networks Inc is currently running 31.0% annualised volatility over the last 21 sessions. Measured against ANET's own 12 years of daily returns rather than a market-wide average, that is the 29th percentile — on the quiet side for this stock, against a typical reading of 39.3%. The distinction matters because a number that looks calm for one stock is turbulent for another, and the absolute figure on its own tells you neither.

ANET is trading -6.1% below its running peak. Across 11 full years on file, its median worst-drawdown-in-a-year was -32.3%, and the deepest was -50.9% in 2025. The current pullback is therefore shallower than what this stock gives back in a typical year, which is context worth having before treating it as a dislocation.

Price sits +26.4% from its 200-day moving average. Against every other day in its history, that gap ranks at the 73rd percentile — a somewhat wider gap than its own norm. Over the past year ANET closed higher on 54% of sessions, and it is currently 1 session into a rising streak.

On October specifically: over 13 years of records, ANET finished the month higher 8 of 13 times, with a median return of +1.8% and an average of +0.9%. Its strongest month historically has been July at +7.5% on average, its weakest September at +0.8%. Seasonality is a weak signal on its own — a decade is a small sample and regimes change — but it is a real distribution rather than a rule of thumb.

Overnight risk is measurable too: ANET has opened more than 2% away from the prior close in 175 of 3,107 sessions (5.6% of the time), with the largest gaps running +6.3% and -10.1%. For anyone holding through an event, that rate is a better guide to overnight exposure than the intraday range.

Across the last 3 dated reports on file, ANET moved an average of 5.4% in the session after earnings, closing higher 0 of those 3 times, with a median move of -7.0% and a largest of -7.1%.

All figures computed from 3,108 daily closes between 2014-06-06 and 2026-10-14, split-adjusted, recomputed daily. Percentiles are against ANET's own 12-year history, not a peer group or index.