Why Constellation Energy Plunged Today

By Billy Duberstein – Mar 11, 2026 at 4:38PM ESTKey PointsElectricity prices fell month-over-month, even as long-term bond yields rose. The combination sent the utility sector down for the day. Constellation, as one of the higher-valued power producers, fell more than the group. Shares of Constellation Energy (CEG 5.23%) fell 5.2% on Wednesday. Constellation has been a hot stock over the past year, as it's the largest U.S.-based nuclear power provider; additionally, Constellation just closed its acquisition of Calpine, which was more concentrated in natural gas and geothermal power, turning the company into a true energy powerhouse. However, shares fell today after the February Consumer Price Index (CPI) report showed a somewhat surprising month-over-month decline in electricity prices, even as long-term bond yields rose. ExpandNASDAQ: CEGConstellation EnergyToday's Change(-5.23%) $-16.58Current Price$300.51Key Data PointsMarket Cap$115BDay's Range$298.32 - $317.1452wk Range$161.35 - $412.70Volume318KAvg Vol3.6MGross Margin17.35%Dividend Yield0.50% Electricity prices fall in February, but are still up year-over-year Today, the Bureau of Labor Statistics released the February CPI report. While overall inflation grew 0.3% month-over-month and 2.4% year-over-year, the pertinent item for Constellation is the electricity category, where prices fell 0.7% month over month. The decline was due to warmer February weather after January's winter storms, but the decline still may have surprised investors, given that electricity prices have been a concern amid rising demand from AI data centers. As a result, the entire utility sector was generally lower today. Also contributing to the sector's decline might have been the rise in 10-year Treasury Bond yields, which increased seven basis points to 4.2%. The war in Iran is pushing up oil prices and perhaps future inflation expectations, despite President Trump's talk that the operation will end "soon" and the news that the International Energy Agency agreed to release 400 million barrels of oil from the strategic petroleum reserve today to stem the rise in oil prices. Utility stocks are generally seen as "safe" stocks that investors buy for their dividend yields. However, the AI infrastructure build-out has caused investors to give utilities and power producers higher growth multiples over the past couple years. Still, higher Treasury Bond rates may be contributing to today's decline in utility stocks, given that utility stocks "compete" somewhat with bonds for investor attention. Combine that with the fact that Constellation had garnered one of the highest multiples in the industry, at 41 times earnings, and it's no surprise to see the stock selling off harder than usual, despite no company-specific news. Image source: Getty Images. Could this be a buy-the-dip moment? Despite the month-over-month decline, electricity prices were still up 4.8% on the year, which is higher, obviously, than the overall 2.4% inflation rate for the overall economy. Looking ahead, Constellation's medium-term growth outlook still remains solid, given the high demand for clean energy to power AI data centers, especially nuclear and natural gas, of which Constellation has in spades. However, there is increasing regulatory risk here. In January, for instance, the Trump Administration, local governors, and the PJM interstate transmission region authorities agreed to cap rate increases on existing power plants while forcing tech companies to backstop the construction of new power sources. These measures could cap Constellation's growth rate in the near-term, but may also extend that growth runway as tech-backed power plants are constructed. Overall, Constellation remains a lower-risk way to play AI's electricity demand boom, though it might not have as much upside as other tech plays in the space, especially at Constellation's current valuation.Read NextMar 8, 2026 •By Manali Pradhan, CFATop 2 Growth Stocks to Buy After Nvidia's Latest Sell-OffMar 5, 2026 •By Matt DiLalloWhy Constellation Energy Stock Surged 17.5% in FebruaryFeb 24, 2026 •By Scott LevineWhy Constellation Energy Stock Is Climbing Higher TodayFeb 17, 2026 •By Matt DiLalloShould You Buy Constellation Energy Stock Before Feb. 20?Feb 16, 2026 •By Courtney CarlsenShould You Buy Constellation Energy Stock While It's Below $290?Feb 12, 2026 •By Rick OrfordWhere Will Constellation Energy Be in 5 Years?About the AuthorBilly Duberstein is a contributing Motley Fool technology analyst covering semiconductors, hardware, software, and AI, as well as consumer goods. Billy loves looking at the story behind investments from an interdisciplinary point of view, with an equal appetite for high-growth disruptors and beaten-down value names. He is also CEO of Stone Oak Capital, a registered investment adviser in California. He previously worked as a technology analyst for several hedge funds and as a research assistant at Wedbush Securities. Billy holds an MBA in finance from New York University and a bachelor’s degree in music from the University of Virginia.TMFStoneOakStocks MentionedConstellation EnergyNASDAQ: CEG$300.51(-5.23%)-$16.58*Average returns of all recommendations since inception. Cost basis and return based on previous market day close.