The Athens General Index is trading near the 2,500-point level, weighed down by broad-based selling that mirrors weakness in US equity markets.
Greek banking stocks are among the worst performers, with Alpha Bank shares down 1% and National Bank of Greece falling 0.5% in early trade.
43% to 25,476.64, driven by selling pressure in technology stocks, while the S&P 500 also retreated 0.
The decline reflects a broader risk-off sentiment that has persisted across global equities following recent volatility in the technology sector.
In the non-banking segment, Aktor Industries continued its downward trajectory, dropping 2.7%, while Elvalhalcor posted significant losses.
The pressure on industrial and materials names suggests that the sell-off is not confined to financials but is affecting cyclical sectors sensitive to global growth concerns.
This follows a session on Wednesday where the Nasdaq Composite fell 0.43% to 25,476.64, driven by selling pressure in technology stocks, while the S&P 500 also retreated 0.10% to 7,358.22.