Is Constellation Energy Stock Increasing Your Market Risk? Trefis Team Thu, November 12, 2026 at 10:59 AM EST 3 min read CEG +1.25% ^GSPC +0.16% NEE +0.82% DUK +0.53% SO -0.31% Explore stocks on Coinbase Trading disclosure Trading disclosure The above button links to Coinbase. Yahoo Finance is not a broker-dealer or investment adviser and does not offer securities or cryptocurrencies for sale or facilitate trading. Coinbase pays us for certain activity generated through this link. Prices displayed are informational.
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Constellation Energy (CEG) calls itself the nation's largest producer of reliable, emissions-free nuclear energy. If you own the stock, it probably sits alongside money that already tracks the S&P 500. Its daily moves land on top of the moves that money already makes. So when the index slips, does Constellation soften the blow to your money or add to it?
Constellation Energy Adds To Your Market Risk
It adds to that risk. Over the year to November 11, 2026, a $10,000 holding in Constellation gained about $91 on the average day the S&P 500 rose 0.659%. On the average day the index fell 0.626%, the same holding lost about $112. The stock ultimately gave back more on the market's bad days than it added on its good ones.
Constellation also tended to move about 1.33% for each 1% move in the index over that year, meaning a market drop has, on average, reached your holding at more than full strength. Its volatility, a measure of how widely a price swings over a year, was 49.6%, against 13.7% for the S&P 500.
Will Constellation Energy Keep Swinging This Widely?
The stock will probably keep swinging, because Constellation remains in the middle of a major change. The company closed its acquisition of Calpine in January 2026 and sold a gas plant in October to meet regulatory commitments tied to that deal. Total debt stood at $23.4 billion at the end of September 2026, against $9.04 billion a year earlier.
During the November 9, 2026 call, management said it had contracted more than 8,500 megawatts so far in 2026, including deals with Google and Amazon, and that those contracts make its earnings more visible. Yet it still expects action from FERC in the first half of 2027 on colocation, placing large users such as data centers beside its plants. A company absorbing a large deal on far more debt while it waits on regulators is likely to keep swinging as widely as it did over the past year.
Much of that swing is unique to Constellation. Over the past year, the stock moved with the index only loosely, carrying a correlation of 0.37 on a scale where 1 means the two always move together.
Has Constellation Energy Paid You For Its Swings?
It has, and a little better than the market has. Over the long run since February 2, 2022, Constellation returned 42.3% a year including dividends, against 12.8% for the S&P 500. Over the same window, its volatility was 49.2% a year, against 17.2% for the index.
Dividing each return by its volatility shows Constellation earned 0.86 of return for each unit of swing, against 0.744 for the S&P 500. Over that long run, each unit of swing you sat through paid you slightly more than the market's did.
If the market's next good day looks like the average one of the past year, Constellation adds more to your money than an index fund does, and on the next bad day it takes away noticeably more. If you already own other bets on power for data centers, Constellation adds to that same bet rather than spreading it. For that risk to stay worth it, Constellation has to keep turning its long-term contracts into earnings while it carries its much larger debt.
What Would Selling Constellation Energy Cost You In Tax?
If you bought long ago, selling can bring a large tax bill, and holding keeps all the risk. A free 30-minute strategy review with our partner advisory firm covers a floor under a large position and a lower-tax way out.
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