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Last updated : 15/09/2026 - 16h08
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Alten stock plunges 10.5% in one week and breaks below its 20-day moving average

The selloff intensifies for Alten this Wednesday, in a Paris market that is itself sharply lower. The engineering and technology consulting specialist's shares extend a difficult sequence that began in late August, erasing much of the quarterly rebound accumulated over the summer.


Alten stock plunges 10.5% in one week and breaks below its 20-day moving average

A decline that fits into a bearish trend for several weeks

Alten is down 3.2% during the session at €68.15, ranking among the largest declines in the SBF 120, which itself is down 1.81% at mid-day. This movement extends a very difficult week for the stock, which was already retreating sharply on Monday, bringing seven-day performance to -10.68%. Over one month, the decline reaches nearly 10%, which significantly moderates the 6.74% gain accumulated over three months.

The overall market context is unfavorable: geopolitical tensions in the Middle East, with attacks on Saudi energy installations pushing Brent toward $98, fuel risk aversion visible across all European growth stocks. Implied volatility, measured by the VIX, surged more than 7% during the session to 16.48, reflecting heightened market nervousness. In this context, cyclical stocks and those sensitive to the tech employment cycle, such as engineering consulting firms, face particular pressure.

Contained valuation, but technical configuration under pressure

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On the analyst consensus front, the stock is valued on the basis of approximately 8.9 times expected earnings for the current fiscal year and 7.9 times those of the following fiscal year, with earnings per share growth projected at +12.8% from one fiscal year to the next, according to the analyst consensus compiled. These multiples remain modest, but the price movement reflects selling pressure that has not weakened since late August. The technical reading reinforces this diagnosis: the stock is now trading 8.44% below its 20-day moving average (€74.43), a significant gap that reflects the severity of the reversal since the summer peak. Conversely, the price remains above its 50-day MA at €67.32 (difference of +1.23%), and this is precisely the threshold that constitutes the immediate reference zone.

The support at €66.80 is located just below, less than 2% from the current price. The RSI at 44 remains in neutral territory, with no clear oversold signal, which indicates that the correction has not yet exhausted itself technically. The resistance at €79.80 appears distant as long as the stock does not recover its 20-day moving average.



Sector Aéronautique et Défense Ingénierie & services techniques (aéro / spatial / défense)


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Context

Period
  • Period: T2 2026
Key reported figures
  • Revenue: 1 056 millions d'euros
  • Quarterly revenue: 1 056 millions d'euros
  • Revenue growth: 3,3 %
Outlook / guidance
  • Expected revenue: 4 165 millions d'euros
  • Management commentary: La croissance organique, à données constantes, devrait être comprise entre 1,4% et 1,8%.

The information presented in this article is provided for informational purposes only and does not constitute an investment recommendation, an incentive to buy or sell a financial asset, or investment advice. Readers are invited to conduct their own research before making any decision.

Investments in the stock market involve risks, including the risk of capital loss. Past performance of an asset or market is no guarantee of future results. Any investment decision should be made taking into account your personal financial situation, objectives and risk tolerance.

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