QCOM −6.5%: 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
  QCOM −6.5% todaySep 28, 2026, 11:35 AM ET
• OBSERVED
  Its sector fund (XLK) −1.4% todaySep 28, 2026, 11:35 AM ET
• CALCULATED
  5.1 points less than its sectorHow: stock return − sector fund return · Sep 28, 2026, 11:35 AM ET
• OBSERVED
  S&P 500 (SPY) −0.8% todaySep 28, 2026, 11:35 AM ET
• CALCULATED
  Volume 0.4× its 20-day averageHow: today’s volume ÷ average of the last 20 days · Sep 28, 2026, 11:35 AM ET
• CALCULATED
  Bigger than 93% of its daily moves over the past 250 trading daysHow: share of past daily moves smaller in size · Sep 28, 2026, 11:35 AM ET
• POSSIBLE CONTRIBUTOR
  News: “What's going on in today's session: S&P500 gap up and gap down stocks”Published around the move. Timing only, not a confirmed cause. · Sep 28, 2026, 10:35 AM ET
• POSSIBLE CONTRIBUTOR
  News: “CEO Predicts: “Demand Will Continue to Rise” as AMD and Intel Soar up to 17% Thanks to Muse”Published around the move. Timing only, not a confirmed cause. · Sep 28, 2026, 9:33 AM ET
• CALCULATED
  After the 13 most similar QCOM days since Oct 12, 2021, the stock was higher 5 days later 6 of 13 timesHistory, not a forecast. · How: same-company days with a move of similar size and direction