Nervousness gripped the Athens Stock Exchange on Tuesday as geopolitical uncertainty in the Middle East continued to suppress investor sentiment.

The General Index held firm at the critical 2,500-point support level, but broad-based selling pressure emerged in key sectors, particularly among financials and industrials.

The fragile peace process between the United States and Iran remains under strain, with both sides exchanging military strikes, casting a shadow over regional stability and market confidence.

CrediaBank and ElvalHalcor were among the most active decliners, reflecting the market's aversion to risk amid the escalating tensions.

The banking sector faces headwinds from both the geopolitical backdrop and broader European equity weakness, while ElvalHalcor's slide underscores the vulnerability of industrial exporters to supply chain disruptions and energy price volatility.

This follows a period of heightened sensitivity in Greek markets, where the General Index has struggled to break out of a narrow trading range despite defensive positioning by local investors.

The broader European context offers little respite, with equity markets opening lower across the continent.

AstraZeneca shares continued their downward trajectory, dragging on index performance and highlighting the pervasive risk-off mood.