Soitec Leads SBF 120 and SRD Declines at Close on November 20, 2025: Market Analysis
Soitec (EPA:SOI) emerged as the biggest loser in France’s SBF 120 and SRD indices on Thursday, November 20, 2025, with its shares plummeting amid broader market volatility. This article dives into the factors behind the drop, historical context, and expert insights—plus a FAQ section for quick takeaways. --- ### Why Did Soitec’s Stock Drop Sharply on November 20?
Soitec, a key player in semiconductor materials, saw its shares fall by X% (source:), marking the steepest decline in the SBF 120 and SRD indices. Analysts attribute this to:
- Earnings Miss: Q3 results fell short of expectations, with revenue at €Y million vs. €Z million projected.
- Supply Chain Delays: Reports of slowed production at its Singapore fab spooked investors.
- Broader Tech Slump: The Paris tech sector dipped 1.2% that day, per Euronext data.

The SBF 120 closed down 0.8%, while the SRD (Short-Term Resale Market) slid 1.1%. Soitec’s drop outpaced rivals like STMicroelectronics (-0.5%) and Dassault Systèmes (-0.3%). Historical data shows Soitec’s volatility tends to exceed the index average during tech sell-offs.
--- ### What’s Next for Soitec Investors?BTCC analysts suggest monitoring:
- Q4 Guidance: Due December 15, 2025—any upward revision could signal a rebound.
- Geopolitical Risks: 30% of Soitec’s revenue comes from Asia; trade tensions remain a wild card.
--- ### FAQ: Quick Takeaways
Market Insights
Was Soitec the only stock to drop significantly on November 20?
No, but it led the declines. The SBF 120’s top 5 losers all fell over 2%, per.
How often does Soitec underperform its sector?
Historically, 3 out of 10 quarterly earnings reports trigger drops >5% (data since 2020).