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ANET −6.3%: an unusually large move for this stock. Arista Networks, Inc. moved 5.0 points less than its sector, on 1.1× its usual volume.

2026-10-15 · ANET

ANET −6.3%: an unusually large move for this stock

Arista Networks, Inc. moved 5.0 points less than its sector, on 1.1× its usual volume.

The story in plain words

Thursday, October 15, 2026. ANET −6.3%: an unusually large move for this stock. Arista Networks, Inc. moved 5.0 points less than its sector, on 1.1× its usual volume.

What the data shows for Arista Networks (ANET): ANET −6.3% today. Its sector fund (XLK) −1.4% today. S&P 500 (SPY) −0.0% today.

Worked out from that data: 5.0 points less than its sector. Volume 1.1× its 20-day average. Bigger than 93% of its daily moves over the past 250 trading days.

Possible contributors. These line up in time with the move; they are not confirmed causes: News: “These S&P500 stocks are gapping in today's session” (Published around the move. Timing only, not a confirmed cause). News: “Is SMCI Stock A Real Bargain?” (Published around the move. Timing only, not a confirmed cause).

About the company: Arista Networks trades as ANET and is part of the S&P 500, in the Information Technology sector (Communications Equipment), headquartered in Santa Clara, California, founded in 2004.

This is one of CookieStocks’ daily stock stories about unusually large one-day price moves in S&P 500 stocks, measured against each stock’s own history, its sector and its usual volume. Stories are found automatically each trading day from market data and SEC filings, and every claim is labelled as observed, calculated or a possible contributor. Statistics only, not investment advice.

Prove it

Every claim on the graphic, labelled: observed (straight from the data), calculated (worked out from it), or possible contributor (lines up in time, not a confirmed cause).

  • OBSERVED
    ANET −6.3% todayOct 15, 2026, 12:35 PM ET
  • OBSERVED
    Its sector fund (XLK) −1.4% todayOct 15, 2026, 12:35 PM ET
  • CALCULATED
    5.0 points less than its sectorHow: stock return − sector fund return · Oct 15, 2026, 12:35 PM ET
  • OBSERVED
    S&P 500 (SPY) −0.0% todayOct 15, 2026, 12:35 PM ET
  • CALCULATED
    Volume 1.1× its 20-day averageHow: today’s volume ÷ average of the last 20 days · Oct 15, 2026, 12:35 PM ET
  • CALCULATED
    Bigger than 93% of its daily moves over the past 250 trading daysHow: share of past daily moves smaller in size · Oct 15, 2026, 12:35 PM ET
  • POSSIBLE CONTRIBUTOR
    News: “These S&P500 stocks are gapping in today's session”Published around the move. Timing only, not a confirmed cause. · Oct 15, 2026, 10:35 AM ET
  • POSSIBLE CONTRIBUTOR
    News: “Is SMCI Stock A Real Bargain?”Published around the move. Timing only, not a confirmed cause. · Oct 15, 2026, 8:52 AM ET

Arista Networks (ANET) financials and filings →

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Statistics only, not investment advice. Past moves don’t predict future ones. Data as of Oct 15, 2026, 12:35 PM ET.