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EFX +6.6%: one of its biggest daily moves this year. EQUIFAX INC moved 6.3 points more than its sector, on 0.7× its usual volume.

2026-10-15 · EFX

EFX +6.6%: one of its biggest daily moves this year

EQUIFAX INC moved 6.3 points more than its sector, on 0.7× its usual volume.

The story in plain words

Thursday, October 15, 2026. EFX +6.6%: one of its biggest daily moves this year. EQUIFAX INC moved 6.3 points more than its sector, on 0.7× its usual volume.

What the data shows for Equifax (EFX): EFX +6.6% today. Its sector fund (XLI) +0.3% today. S&P 500 (SPY) +0.3% today.

Worked out from that data: 6.3 points more than its sector. Volume 0.7× its 20-day average. Bigger than 99% of its daily moves over the past 250 trading days. After the 5 most similar EFX days since Oct 27, 2021, the stock was higher 5 days later 4 of 5 times (History, not a forecast).

Possible contributors. These line up in time with the move; they are not confirmed causes: News: “Which S&P500 stocks are moving on Thursday?” (Published around the move. Timing only, not a confirmed cause). News: “Discover which S&P500 stocks are making waves on Thursday.” (Published around the move. Timing only, not a confirmed cause).

About the company: Equifax trades as EFX and is part of the S&P 500, in the Industrials sector (Research & Consulting Services), headquartered in Atlanta, Georgia, founded in 1899.

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
    EFX +6.6% todayOct 15, 2026, 4:05 PM ET
  • OBSERVED
    Its sector fund (XLI) +0.3% todayOct 15, 2026, 4:05 PM ET
  • CALCULATED
    6.3 points more than its sectorHow: stock return − sector fund return · Oct 15, 2026, 4:05 PM ET
  • OBSERVED
    S&P 500 (SPY) +0.3% todayOct 15, 2026, 4:05 PM ET
  • CALCULATED
    Volume 0.7× its 20-day averageHow: today’s volume ÷ average of the last 20 days · Oct 15, 2026, 4:05 PM ET
  • CALCULATED
    Bigger than 99% of its daily moves over the past 250 trading daysHow: share of past daily moves smaller in size · Oct 15, 2026, 4:05 PM ET
  • POSSIBLE CONTRIBUTOR
    News: “Which S&P500 stocks are moving on Thursday?”Published around the move. Timing only, not a confirmed cause. · Oct 15, 2026, 3:05 PM ET
  • POSSIBLE CONTRIBUTOR
    News: “Discover which S&P500 stocks are making waves on Thursday.”Published around the move. Timing only, not a confirmed cause. · Oct 15, 2026, 12:35 PM ET
  • CALCULATED
    After the 5 most similar EFX days since Oct 27, 2021, the stock was higher 5 days later 4 of 5 timesHistory, not a forecast. · How: same-company days with a move of similar size and direction

Equifax (EFX) 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, 4:05 PM ET.