Frankfurt's DAX 40 fell about 0.4% to trade below 25,200 on Thursday, weighed down by a global tech selloff triggered by AI-concerns and the prospect of higher interest rates in the US. Meanwhile, investors continued to monitor geopolitical developments and corporate earnings worldwide. Infineon Technologies plunged over 9%, making it the worst performer, with AI-related Siemens Energy (-6.9%) and Hochtief (-3.5%) also falling sharply.