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IT −12.4%: one of its biggest daily moves this year. GARTNER INC moved 13.8 points less than its sector, on 2.6× its usual volume.

2026-11-03 · IT

IT −12.4%: one of its biggest daily moves this year

GARTNER INC moved 13.8 points less than its sector, on 2.6× its usual volume.

The story in plain words

Tuesday, November 3, 2026. IT −12.4%: one of its biggest daily moves this year. GARTNER INC moved 13.8 points less than its sector, on 2.6× its usual volume.

What the data shows for Gartner (IT): IT −12.4% today. Its sector fund (XLK) +1.3% today. S&P 500 (SPY) +0.3% today.

Worked out from that data: 13.8 points less than its sector. Volume 2.6× its 20-day average. Bigger than 99% of its daily moves over the past 250 trading days. After the 11 most similar IT days since Nov 17, 2021, the stock was higher 5 days later 6 of 11 times (History, not a forecast).

Possible contributors. These line up in time with the move; they are not confirmed causes: News: “Gartner Stock Sinks. Weak Forecast Underscores Threat From Cheaper AI Services.” (Published around the move. Timing only, not a confirmed cause). News: “Gartner, Inc. Q3 2026 Earnings Call Summary” (Published around the move. Timing only, not a confirmed cause). 10-Q filed (Filed around the move. Timing only). 8-K filed: Earnings results, Regulation FD disclosure (Filed around the move. Timing only).

About the company: Gartner trades as IT and is part of the S&P 500, in the Information Technology sector (IT Consulting & Other Services), headquartered in Stamford, Connecticut, founded in 1979.

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
    IT −12.4% todayNov 3, 2026, 4:35 PM ET
  • OBSERVED
    Its sector fund (XLK) +1.3% todayNov 3, 2026, 4:35 PM ET
  • CALCULATED
    13.8 points less than its sectorHow: stock return − sector fund return · Nov 3, 2026, 4:35 PM ET
  • OBSERVED
    S&P 500 (SPY) +0.3% todayNov 3, 2026, 4:35 PM ET
  • CALCULATED
    Volume 2.6× its 20-day averageHow: today’s volume ÷ average of the last 20 days · Nov 3, 2026, 4:35 PM ET
  • CALCULATED
    Bigger than 99% of its daily moves over the past 250 trading daysHow: share of past daily moves smaller in size · Nov 3, 2026, 4:35 PM ET
  • POSSIBLE CONTRIBUTOR
    News: “Gartner Stock Sinks. Weak Forecast Underscores Threat From Cheaper AI Services.”Published around the move. Timing only, not a confirmed cause. · Nov 3, 2026, 1:15 PM ET
  • POSSIBLE CONTRIBUTOR
    News: “Gartner, Inc. Q3 2026 Earnings Call Summary”Published around the move. Timing only, not a confirmed cause. · Nov 3, 2026, 12:53 PM ET
  • POSSIBLE CONTRIBUTOR
    10-Q filedFiled around the move. Timing only. · Source: SEC EDGAR · Nov 3, 2026, 3:00 PM ET
  • POSSIBLE CONTRIBUTOR
    8-K filed: Earnings results, Regulation FD disclosureFiled around the move. Timing only. · Source: SEC EDGAR · Nov 3, 2026, 3:00 PM ET
  • CALCULATED
    After the 11 most similar IT days since Nov 17, 2021, the stock was higher 5 days later 6 of 11 timesHistory, not a forecast. · How: same-company days with a move of similar size and direction

Gartner (IT) financials and filings →

More stories

Statistics only, not investment advice. Past moves don’t predict future ones. Data as of Nov 3, 2026, 4:35 PM ET.