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CEG +14.2%: one of its biggest daily moves this year. Constellation Energy Corp moved 11.9 points more than its sector, on 2.3× its usual volume.

2026-10-06 · CEG

CEG +14.2%: one of its biggest daily moves this year

Constellation Energy Corp moved 11.9 points more than its sector, on 2.3× its usual volume.

The story in plain words

Tuesday, October 6, 2026. CEG +14.2%: one of its biggest daily moves this year. Constellation Energy Corp moved 11.9 points more than its sector, on 2.3× its usual volume.

What the data shows for Constellation Energy (CEG): CEG +14.2% today. Its sector fund (XLU) +2.3% today. S&P 500 (SPY) +0.8% today.

Worked out from that data: 11.9 points more than its sector. Volume 2.3× its 20-day average. Its biggest daily move in the past 250 trading days. After the 11 most similar CEG days since Apr 19, 2022, the stock was higher 5 days later 6 of 11 times (History, not a forecast).

Possible contributors. These line up in time with the move; they are not confirmed causes: News: “Top Midday Stories: Google Strikes 20-Year Nuclear Power Deal With Constellation; Marvell Raises Revenue Guidance for 2026-27” (Published around the move. Timing only, not a confirmed cause). News: “Google, Constellation Energy Strike 3.59-GW Power Deal” (Published around the move. Timing only, not a confirmed cause).

About the company: Constellation Energy trades as CEG and is part of the S&P 500, in the Utilities sector (Electric Utilities), headquartered in Baltimore, Maryland, founded in 1999.

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
    CEG +14.2% todayOct 6, 2026, 12:35 PM ET
  • OBSERVED
    Its sector fund (XLU) +2.3% todayOct 6, 2026, 12:35 PM ET
  • CALCULATED
    11.9 points more than its sectorHow: stock return − sector fund return · Oct 6, 2026, 12:35 PM ET
  • OBSERVED
    S&P 500 (SPY) +0.8% todayOct 6, 2026, 12:35 PM ET
  • CALCULATED
    Volume 2.3× its 20-day averageHow: today’s volume ÷ average of the last 20 days · Oct 6, 2026, 12:35 PM ET
  • CALCULATED
    Its biggest daily move in the past 250 trading daysHow: share of past daily moves smaller in size · Oct 6, 2026, 12:35 PM ET
  • POSSIBLE CONTRIBUTOR
    News: “Top Midday Stories: Google Strikes 20-Year Nuclear Power Deal With Constellation; Marvell Raises Revenue Guidance for 2026-27”Published around the move. Timing only, not a confirmed cause. · Oct 6, 2026, 11:45 AM ET
  • POSSIBLE CONTRIBUTOR
    News: “Google, Constellation Energy Strike 3.59-GW Power Deal”Published around the move. Timing only, not a confirmed cause. · Oct 6, 2026, 11:18 AM ET
  • CALCULATED
    After the 11 most similar CEG days since Apr 19, 2022, the stock was higher 5 days later 6 of 11 timesHistory, not a forecast. · How: same-company days with a move of similar size and direction

Constellation Energy (CEG) financials and filings →

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Statistics only, not investment advice. Past moves don’t predict future ones. Data as of Oct 6, 2026, 12:35 PM ET.