Bouygues Stock Climbs 1.92% at Close Amid Major Nuclear Contract
On Monday, December 15, 2025, Bouygues shares closed at 43.98 euros on Euronext Paris, marking a 1.92% increase from the previous day. This rise is part of a strong upward trend for the year, driven by the recent announcement of a strategic nuclear contract in the United Kingdom and solid fundamentals despite a complex economic environment. The stock continues its remarkable journey that began at the start of 2025.
Daily and Annual Performance
At the close this Monday, Bouygues shares were recorded at 43.98 euros, up 1.92% from the previous day's price of 43.15 euros. Trading volumes remained moderate, representing 0.06% of the capital, indicating a movement without speculative acceleration. This daily performance is part of an exceptional annual trajectory: the stock has now increased by 51.29% since the beginning of 2025, significantly outperforming the CAC 40. On shorter timeframes, the stock also maintains its momentum, with an increase of 1.88% over the week and 16.38% over the last three months. These figures reflect a sustained buying dynamic, bolstered by the announcement in early November of a major contract for the construction of the Sizewell C nuclear power plant in the United Kingdom. This contract, worth a total of 3.3 billion pounds, provides strategic visibility for the group's construction branch, which remains a pillar of growth. The group posted solid results for the first nine months in November, with revenue reaching 41.9 billion euros, up 0.9%, and current operating income from activities increasing by 5.5% to 1.81 billion euros. However, management slightly revised its annual revenue forecasts downward, mainly due to unfavorable exchange rate effects, while confirming slight growth in ROCA compared to 2024.
Impact of the Strategic Contract
The announcement on November 5 continues to fuel investor confidence. Bouygues Construction, part of the Civil Works Alliance with British firms Laing O'Rourke and Balfour Beatty, was selected to carry out the civil engineering work for the two EPR reactors at the Sizewell C nuclear power plant in Suffolk. This energy project, with a total cost of around 43 billion euros, represents a significant order book for the French giant, estimated at about 3 billion pounds sterling, spread until 2030. This selection is based on Bouygues' recognized expertise in European nuclear projects, with major references such as Hinkley Point C in England, Flamanville in France, and Olkiluoto in Finland. The Sizewell C plant will deliver a combined output of 3.2 gigawatts, sufficient to power six million British households for over 60 years. The project benefits from massive institutional support, including a 5 billion pound guarantee from Bpifrance Assurance Export. Beyond this emblematic contract, the group's construction businesses showed a growth of 5.5% over nine months, while Equans, the subsidiary specializing in energy services, contributed to the improvement of the operating result. These elements partly explain the stock's outperformance since the beginning of the year and strengthen its medium-term commercial visibility.
Technical Perspective
From a technical standpoint, Bouygues' stock is performing above its main moving averages, confirming the strength of the upward trend. The closing price of the day, at 43.98 euros, is above the 50-day moving average, set at 41.05 euros, and well beyond the 200-day average, fixed at 38.48 euros. However, the stock is approaching its resistance threshold identified at 43.71 euros, which it slightly exceeded this Monday, and is flirting with the upper boundary of the Bollinger bands at 44.23 euros. This proximity indicates a possible phase of consolidation in the short term. The Relative Strength Index, positioned at 63, shows a bullish momentum without excess, below the overbought zone generally located beyond 70. This level suggests some room for progression before a possible technical exhaustion. Additionally, the MACD displays a slightly bearish configuration, with a main line at 0.64 and a signal line at 0.66, generating a negative histogram of -0.02. This minor divergence suggests a slight easing of the buying momentum in the very short term, without, however, questioning the underlying dynamic. With a low beta of 0.23, Bouygues' stock shows significantly lower volatility than the market, a profile appreciated by investors seeking stability. The one-month volatility, measured at 3.60, also remains contained. The Chaikin Money Flow, at 0.13, indicates positive capital flows, consistent with continued buying. Overall, the technical configuration remains favorable, although the proximity to resistance calls for caution in the very short term.
