CBOE +5.3%: one of its biggest daily moves this year

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
  CBOE +5.3% todaySep 30, 2026, 2:35 PM ET
• OBSERVED
  Its sector fund (XLF) −0.9% todaySep 30, 2026, 2:35 PM ET
• CALCULATED
  6.1 points more than its sectorHow: stock return − sector fund return · Sep 30, 2026, 2:35 PM ET
• OBSERVED
  S&P 500 (SPY) +0.4% todaySep 30, 2026, 2:35 PM ET
• CALCULATED
  Volume 1.0× its 20-day averageHow: today’s volume ÷ average of the last 20 days · Sep 30, 2026, 2:35 PM ET
• CALCULATED
  Bigger than 98% of its daily moves over the past 250 trading daysHow: share of past daily moves smaller in size · Sep 30, 2026, 2:35 PM ET
• POSSIBLE CONTRIBUTOR
  News: “Uncover the latest developments among S&P500 stocks in today's session.”Published around the move. Timing only, not a confirmed cause. · Sep 30, 2026, 12:35 PM ET
• POSSIBLE CONTRIBUTOR
  News: “3 Financial Stocks Watching The Treasury Trade Stress Test”Published around the move. Timing only, not a confirmed cause. · Sep 30, 2026, 11:11 AM ET
• POSSIBLE CONTRIBUTOR
  8-K filed: Material agreement, Regulation FD disclosureFiled around the move. Timing only. · Source: SEC EDGAR · Sep 29, 2026, 4:00 PM ET
• CALCULATED
  After the 5 most similar CBOE days since Oct 13, 2021, the stock was higher 5 days later 5 of 5 timesHistory, not a forecast. · How: same-company days with a move of similar size and direction