ArcelorMittal, ACS and Repsol surge over 40% in 2026, outpacing the Ibex 35's 8.42% rise
Executive summary: ArcelorMittal, ACS and Repsol each rose more than 40% in 2026, overtaking the Ibex 35's 8.42% gain. The strong performance indicates renewed investor confidence in heavy industry and energy stocks, potentially reshaping portfolio allocations.
Who is involved: ArcelorMittal, ACS, Repsol and the Ibex 35 index.
Likely next: Investors may increase exposure to these outperformers, while other Ibex components may seek to catch up or diversify.
On 12 June 2026, Expansión reported that ArcelorMittal, ACS and Repsol posted gains exceeding 40% year‑to‑date, significantly outperforming the Ibex 35's 8.42% increase. The article lists nearly ten companies in the index posting over 20% gains. This outperformance reflects strong sectoral momentum in heavy industry, construction and energy. The movement signals shifting investor focus toward traditional sectors amid broader market trends.
What's next — scenarios
Sectoral Super-Cycle (50%)
Capital reallocation from tech/growth toward heavy industry and energy will drive sustained Ibex 35 alpha.
- Continued quarterly earnings beats in industrial sectors
- Rising commodity prices (Steel/Oil)
Cyclical Peak/Mean Reversion (30%)
The current outperformance is a temporary hedge against inflation, leading to a sharp correction in ArcelorMittal and Repsol.
- Decline in manufacturing PMI
- Central bank interest rate stabilization
Broad Market Catch-up (20%)
The Ibex 35 performance improves as the laggard sectors align with industrial leaders, reducing volatility.
- Increased trading volume in non-industrial Ibex components
- Stabilization of industrial spread vs index
What to watch
- Quarterly earnings reports for ArcelorMittal and ACS (Next 45 days)
- Brent Crude and Iron Ore price volatility (Next 30 days)
- ECB monetary policy updates regarding industrial inflation (Next 60 days)
Timeline
- — ArcelorMittal, ACS and Repsol surge over 40% in 2026 (Expansión)
Analysis — what this means
Likely next events
- Increased institutional buying of heavy‑industry stocks
- Potential rebalancing of Ibex sector weightings
- Possible regulatory or policy discussions on energy transition for Repsol
Sectors affected
- Industrial
- Construction
- Energy
Regulatory implications
- EU emissions policy scrutiny on steel producers
- Energy market regulation review for Repsol
- Construction safety standards discussion for ACS
Historical parallels
- Outperformance of Spanish heavyweights in 2019
- Eurozone rally after 2008 crisis
- Tech‑driven surge of Nasdaq‑listed firms echoing 2021 pattern
Key entities
Sources
Related cases
- ACS gears up for its annual Capital Markets Day, seeking to replicate 2025’s share‑price surge to €140 while navigating AI‑driven opportunities and Ormuz supply‑chain risks
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- Spanish energy giants Iberdrola, Endesa, Naturgy, Repsol and Moeve are set to more than double their 2023 profits in 2026, driven by record gas and oil prices
- ACS secures A$430 million highway upgrade contract in Australia, expanding its infrastructure order book
- ACS overtakes Chinese rivals to lead international construction revenue, bolstered by US market strength
- Spanish construction giants ACS, FCC, Acciona and Sacyr hit record order books, up 8.6% vs December and 15.8% YoY driven by overseas contracts