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AMAT −7.0%: an unusually large move for this stock. APPLIED MATERIALS INC /DE moved 6.8 points less than its sector, on 1.3× its usual volume.

2026-10-13 · AMAT

AMAT −7.0%: an unusually large move for this stock

APPLIED MATERIALS INC /DE moved 6.8 points less than its sector, on 1.3× its usual volume.

The story in plain words

Tuesday, October 13, 2026. AMAT −7.0%: an unusually large move for this stock. APPLIED MATERIALS INC /DE moved 6.8 points less than its sector, on 1.3× its usual volume.

What the data shows for Applied Materials (AMAT): AMAT −7.0% today. Its sector fund (XLK) −0.2% today. S&P 500 (SPY) +0.0% today.

Worked out from that data: 6.8 points less than its sector. Volume 1.3× its 20-day average. Bigger than 94% of its daily moves over the past 250 trading days. After the 8 most similar AMAT days since Oct 27, 2021, the stock was higher 5 days later 4 of 8 times (History, not a forecast).

Possible contributors. These line up in time with the move; they are not confirmed causes: News: “These S&P500 stocks are moving in today's session” (Published around the move. Timing only, not a confirmed cause). News: “Update: US Equity Indexes Fall Amid Declines in Technology, Mixed Mega-Cap Banking Results” (Published around the move. Timing only, not a confirmed cause).

About the company: Applied Materials trades as AMAT and is part of the S&P 500, in the Information Technology sector (Semiconductor Materials & Equipment), headquartered in Santa Clara, California, founded in 1967.

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
    AMAT −7.0% todayOct 13, 2026, 3:35 PM ET
  • OBSERVED
    Its sector fund (XLK) −0.2% todayOct 13, 2026, 3:35 PM ET
  • CALCULATED
    6.8 points less than its sectorHow: stock return − sector fund return · Oct 13, 2026, 3:35 PM ET
  • OBSERVED
    S&P 500 (SPY) +0.0% todayOct 13, 2026, 3:35 PM ET
  • CALCULATED
    Volume 1.3× its 20-day averageHow: today’s volume ÷ average of the last 20 days · Oct 13, 2026, 3:35 PM ET
  • CALCULATED
    Bigger than 94% of its daily moves over the past 250 trading daysHow: share of past daily moves smaller in size · Oct 13, 2026, 3:35 PM ET
  • POSSIBLE CONTRIBUTOR
    News: “These S&P500 stocks are moving in today's session”Published around the move. Timing only, not a confirmed cause. · Oct 13, 2026, 3:05 PM ET
  • POSSIBLE CONTRIBUTOR
    News: “Update: US Equity Indexes Fall Amid Declines in Technology, Mixed Mega-Cap Banking Results”Published around the move. Timing only, not a confirmed cause. · Oct 13, 2026, 1:49 PM ET
  • CALCULATED
    After the 8 most similar AMAT days since Oct 27, 2021, the stock was higher 5 days later 4 of 8 timesHistory, not a forecast. · How: same-company days with a move of similar size and direction

Applied Materials (AMAT) financials and filings →

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Statistics only, not investment advice. Past moves don’t predict future ones. Data as of Oct 13, 2026, 3:35 PM ET.