GM −3.8%: an unusually large move for this stock

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
  GM −3.8% todaySep 30, 2026, 1:05 PM ET
• OBSERVED
  Its sector fund (XLY) +0.0% todaySep 30, 2026, 1:05 PM ET
• CALCULATED
  3.8 points less than its sectorHow: stock return − sector fund return · Sep 30, 2026, 1:05 PM ET
• OBSERVED
  S&P 500 (SPY) +0.5% todaySep 30, 2026, 1:05 PM ET
• CALCULATED
  Volume 0.5× its 20-day averageHow: today’s volume ÷ average of the last 20 days · Sep 30, 2026, 1:05 PM ET
• CALCULATED
  Bigger than 93% of its daily moves over the past 250 trading daysHow: share of past daily moves smaller in size · Sep 30, 2026, 1:05 PM ET
• POSSIBLE CONTRIBUTOR
  News: “Micron is crushing it, but so is SanDisk. So why are they still underestimated?”Published around the move. Timing only, not a confirmed cause. · Sep 30, 2026, 10:24 AM ET
• POSSIBLE CONTRIBUTOR
  News: “Ultium Cells to invest $1 billion in Spring Hill battery plant”Published around the move. Timing only, not a confirmed cause. · Sep 30, 2026, 9:41 AM ET