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SNDK −20.6%: one of its biggest daily moves this year. Sandisk Corp moved 13.0 points less than its sector, on 2.9× its usual volume.

2026-11-05 · SNDK

SNDK −20.6%: one of its biggest daily moves this year

Sandisk Corp moved 13.0 points less than its sector, on 2.9× its usual volume.

The story in plain words

Thursday, November 5, 2026. SNDK −20.6%: one of its biggest daily moves this year. Sandisk Corp moved 13.0 points less than its sector, on 2.9× its usual volume.

What the data shows for Sandisk (SNDK): SNDK −20.6% today. Its sector fund (XLK) −7.6% today. S&P 500 (SPY) −4.2% today.

Worked out from that data: 13.0 points less than its sector. Volume 2.9× its 20-day average. Bigger than 99% 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: “Stock Market Today: Dow Down 1,500 Points As Volatility Spikes; Expedia Posts A Soft Outlook (Live Coverage)” (Published around the move. Timing only, not a confirmed cause). News: “Equities Plunge in Tech-Led Sell-Off Amid Data Center Restriction Fears” (Published around the move. Timing only, not a confirmed cause).

About the company: Sandisk trades as SNDK and is part of the S&P 500, in the Information Technology sector (Technology Hardware, Storage & Peripherals), headquartered in Milpitas, California, founded in 1988.

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
    SNDK −20.6% todayNov 5, 2026, 4:35 PM ET
  • OBSERVED
    Its sector fund (XLK) −7.6% todayNov 5, 2026, 4:35 PM ET
  • CALCULATED
    13.0 points less than its sectorHow: stock return − sector fund return · Nov 5, 2026, 4:35 PM ET
  • OBSERVED
    S&P 500 (SPY) −4.2% todayNov 5, 2026, 4:35 PM ET
  • CALCULATED
    Volume 2.9× its 20-day averageHow: today’s volume ÷ average of the last 20 days · Nov 5, 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 5, 2026, 4:35 PM ET
  • POSSIBLE CONTRIBUTOR
    News: “Stock Market Today: Dow Down 1,500 Points As Volatility Spikes; Expedia Posts A Soft Outlook (Live Coverage)”Published around the move. Timing only, not a confirmed cause. · Nov 5, 2026, 2:46 PM ET
  • POSSIBLE CONTRIBUTOR
    News: “Equities Plunge in Tech-Led Sell-Off Amid Data Center Restriction Fears”Published around the move. Timing only, not a confirmed cause. · Nov 5, 2026, 2:14 PM ET

Sandisk (SNDK) financials and filings →

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Statistics only, not investment advice. Past moves don’t predict future ones. Data as of Nov 5, 2026, 4:35 PM ET.