European shares declined on Thursday, with technology stocks, particularly STMicroelectronics, and Nestle shares weighing on the market. Nestle's stock fell nearly 7% following its earnings report. In contrast, energy stocks saw gains as Brent crude oil prices surged toward $100 a barrel, reigniting inflation concerns. The anticipation of the European Central Bank's policy decision, coupled with hawkish signals, pushed government borrowing costs to long-term highs. Alphabet's increased spending on artificial intelligence also contributed to investor caution.