The CAC 40 reversed early losses to close about 0.3% up at 8303 on Monday, its highest level in a week and ranking among the strongest performers across Europe. Technology provided the main support, led by STMicroelectronics (+4%) following a renewed enthusiasm for artificial intelligence after the launch of GPT-6 Astra by OpenAI, the startup's " world's smartest " model. Schneider Electric and Legrand also advanced solidly, rising 2.7% and 2.4%, respectively. TotalEnergies gained 1.5%, supported by higher oil prices and news that it had completed several major contractual and commercial milestones for the Papua LNG project. Meanwhile, geopolitical tensions and rising energy prices kept traders on edge, while expectations of further rate hikes and mounting political uncertainty in Europe weighed on sentiment.